Remove ASan asm instrumentation.

[eugenis]

Summary

It is incomplete and has no users AFAIK.

compiler-rt/lib/asan/tests/CMakeLists.txt

 endif()
 
 set(ASAN_BLACKLIST_FILE "${CMAKE_CURRENT_SOURCE_DIR}/asan_test.ignore")
 set(ASAN_UNITTEST_INSTRUMENTED_CFLAGS
   ${ASAN_UNITTEST_COMMON_CFLAGS}
   -fsanitize=address
   "-fsanitize-blacklist=${ASAN_BLACKLIST_FILE}"
 )
-if(CAN_TARGET_x86_64 OR CAN_TARGET_i386)
-  list(APPEND ASAN_UNITTEST_INSTRUMENTED_CFLAGS -mllvm -asan-instrument-assembly)
-endif()
-
 if(NOT MSVC)
   list(APPEND ASAN_UNITTEST_COMMON_LINK_FLAGS --driver-mode=g++)
 endif()
 
 # x86_64 FreeBSD 9.2 additionally requires libc++ to build the tests.
 if(CMAKE_SYSTEM MATCHES "FreeBSD-9.2-RELEASE")
   list(APPEND ASAN_UNITTEST_COMMON_LINK_FLAGS "-lc++")
 endif()

 set(ASAN_NOINST_TEST_SOURCES
   ${COMPILER_RT_GTEST_SOURCE}
   asan_fake_stack_test.cc
   asan_noinst_test.cc
   asan_test_main.cc)
 
 set(ASAN_INST_TEST_SOURCES
   ${COMPILER_RT_GTEST_SOURCE}
-  asan_asm_test.cc
   asan_globals_test.cc
   asan_interface_test.cc
   asan_internal_interface_test.cc
   asan_test.cc
   asan_oob_test.cc
   asan_mem_test.cc
   asan_str_test.cc
   asan_test_main.cc)

compiler-rt/lib/asan/tests/asan_asm_test.cc

-//===-- asan_asm_test.cc --------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of AddressSanitizer, an address sanity checker.
-//
-//===----------------------------------------------------------------------===//
-#include "asan_test_utils.h"
-
-#if defined(__linux__) &&                                                      \
-    (!defined(ASAN_SHADOW_SCALE) || ASAN_SHADOW_SCALE == 3)
-
-// Assembly instrumentation is broken on x86 Android (x86 + PIC + shared runtime
-// library). See https://github.com/google/sanitizers/issues/353
-#if defined(__x86_64__) ||                                                     \
-    (defined(__i386__) && defined(__SSE2__) && !defined(__ANDROID__))
-
-#include <emmintrin.h>
-
-namespace {
-
-template<typename T> void asm_write(T *ptr, T val);
-template<typename T> T asm_read(T *ptr);
-template<typename T> void asm_rep_movs(T *dst, T *src, size_t n);
-
-} // End of anonymous namespace
-
-#endif // defined(__x86_64__) || (defined(__i386__) && defined(__SSE2__))
-
-#if defined(__x86_64__)
-
-namespace {
-
-#define DECLARE_ASM_WRITE(Type, Size, Mov, Reg)        \
-template<> void asm_write<Type>(Type *ptr, Type val) { \
-  __asm__(                                             \
-    Mov " %[val], (%[ptr])  \n\t"                      \
-    :                                                  \
-    : [ptr] "r" (ptr), [val] Reg (val)                 \
-    : "memory"                                         \
-  );                                                   \
-}
-
-#define DECLARE_ASM_READ(Type, Size, Mov, Reg)     \
-template<> Type asm_read<Type>(Type *ptr) {        \
-  Type res;                                        \
-  __asm__(                                         \
-    Mov " (%[ptr]), %[res]  \n\t"                  \
-    : [res] Reg (res)                              \
-    : [ptr] "r" (ptr)                              \
-    : "memory"                                     \
-  );                                               \
-  return res;                                      \
-}
-
-#define DECLARE_ASM_REP_MOVS(Type, Movs)                         \
-  template <>                                                    \
-  void asm_rep_movs<Type>(Type * dst, Type * src, size_t size) { \
-    __asm__("rep " Movs " \n\t"                                  \
-            : "+D"(dst), "+S"(src), "+c"(size)                   \
-            :                                                    \
-            : "memory");                                         \
-  }
-
-DECLARE_ASM_WRITE(U8, "8", "movq", "r");
-DECLARE_ASM_READ(U8, "8", "movq", "=r");
-DECLARE_ASM_REP_MOVS(U8, "movsq");
-
-} // End of anonymous namespace
-
-#endif // defined(__x86_64__)
-
-#if defined(__i386__) && defined(__SSE2__) && !defined(__ANDROID__)
-
-namespace {
-
-#define DECLARE_ASM_WRITE(Type, Size, Mov, Reg)        \
-template<> void asm_write<Type>(Type *ptr, Type val) { \
-  __asm__(                                             \
-    Mov " %[val], (%[ptr])  \n\t"                      \
-    :                                                  \
-    : [ptr] "r" (ptr), [val] Reg (val)                 \
-    : "memory"                                         \
-  );                                                   \
-}
-
-#define DECLARE_ASM_READ(Type, Size, Mov, Reg)     \
-template<> Type asm_read<Type>(Type *ptr) {        \
-  Type res;                                        \
-  __asm__(                                         \
-    Mov " (%[ptr]), %[res]  \n\t"                  \
-    : [res] Reg (res)                              \
-    : [ptr] "r" (ptr)                              \
-    : "memory"                                     \
-  );                                               \
-  return res;                                      \
-}
-
-#define DECLARE_ASM_REP_MOVS(Type, Movs)                         \
-  template <>                                                    \
-  void asm_rep_movs<Type>(Type * dst, Type * src, size_t size) { \
-    __asm__("rep " Movs " \n\t"                                  \
-            : "+D"(dst), "+S"(src), "+c"(size)                   \
-            :                                                    \
-            : "memory");                                         \
-  }
-
-} // End of anonymous namespace
-
-#endif  // defined(__i386__) && defined(__SSE2__)
-
-#if defined(__x86_64__) ||                                                     \
-    (defined(__i386__) && defined(__SSE2__) && !defined(__ANDROID__))
-
-namespace {
-
-DECLARE_ASM_WRITE(U1, "1", "movb", "r");
-DECLARE_ASM_WRITE(U2, "2", "movw", "r");
-DECLARE_ASM_WRITE(U4, "4", "movl", "r");
-DECLARE_ASM_WRITE(__m128i, "16", "movaps", "x");
-
-DECLARE_ASM_READ(U1, "1", "movb", "=r");
-DECLARE_ASM_READ(U2, "2", "movw", "=r");
-DECLARE_ASM_READ(U4, "4", "movl", "=r");
-DECLARE_ASM_READ(__m128i, "16", "movaps", "=x");
-
-DECLARE_ASM_REP_MOVS(U1, "movsb");
-DECLARE_ASM_REP_MOVS(U2, "movsw");
-DECLARE_ASM_REP_MOVS(U4, "movsl");
-
-template<typename T> void TestAsmWrite(const char *DeathPattern) {
-  T *buf = new T;
-  EXPECT_DEATH(asm_write(&buf[1], static_cast<T>(0)), DeathPattern);
-  T var = 0x12;
-  asm_write(&var, static_cast<T>(0x21));
-  ASSERT_EQ(static_cast<T>(0x21), var);
-  delete buf;
-}
-
-template<> void TestAsmWrite<__m128i>(const char *DeathPattern) {
-  char *buf = new char[16];
-  char *p = buf + 16;
-  if (((uintptr_t) p % 16) != 0)
-    p = buf + 8;
-  assert(((uintptr_t) p % 16) == 0);
-  __m128i val = _mm_set1_epi16(0x1234);
-  EXPECT_DEATH(asm_write<__m128i>((__m128i*) p, val), DeathPattern);
-  __m128i var = _mm_set1_epi16(0x4321);
-  asm_write(&var, val);
-  ASSERT_EQ(0x1234, _mm_extract_epi16(var, 0));
-  delete [] buf;
-}
-
-template<typename T> void TestAsmRead(const char *DeathPattern) {
-  T *buf = new T;
-  EXPECT_DEATH(asm_read(&buf[1]), DeathPattern);
-  T var = 0x12;
-  ASSERT_EQ(static_cast<T>(0x12), asm_read(&var));
-  delete buf;
-}
-
-template<> void TestAsmRead<__m128i>(const char *DeathPattern) {
-  char *buf = new char[16];
-  char *p = buf + 16;
-  if (((uintptr_t) p % 16) != 0)
-    p = buf + 8;
-  assert(((uintptr_t) p % 16) == 0);
-  EXPECT_DEATH(asm_read<__m128i>((__m128i*) p), DeathPattern);
-  __m128i val = _mm_set1_epi16(0x1234);
-  ASSERT_EQ(0x1234, _mm_extract_epi16(asm_read(&val), 0));
-  delete [] buf;
-}
-
-U4 AsmLoad(U4 *a) {
-  U4 r;
-  __asm__("movl (%[a]), %[r]  \n\t" : [r] "=r" (r) : [a] "r" (a) : "memory");
-  return r;
-}
-
-void AsmStore(U4 r, U4 *a) {
-  __asm__("movl %[r], (%[a])  \n\t" : : [a] "r" (a), [r] "r" (r) : "memory");
-}
-
-template <typename T>
-void TestAsmRepMovs(const char *DeathPatternRead,
-                    const char *DeathPatternWrite) {
-  T src_good[4] = { 0x0, 0x1, 0x2, 0x3 };
-  T dst_good[4] = {};
-  asm_rep_movs(dst_good, src_good, 4);
-  ASSERT_EQ(static_cast<T>(0x0), dst_good[0]);
-  ASSERT_EQ(static_cast<T>(0x1), dst_good[1]);
-  ASSERT_EQ(static_cast<T>(0x2), dst_good[2]);
-  ASSERT_EQ(static_cast<T>(0x3), dst_good[3]);
-
-  T dst_bad[3];
-  EXPECT_DEATH(asm_rep_movs(dst_bad, src_good, 4), DeathPatternWrite);
-
-  T src_bad[3] = { 0x0, 0x1, 0x2 };
-  EXPECT_DEATH(asm_rep_movs(dst_good, src_bad, 4), DeathPatternRead);
-
-  T* dp = dst_bad + 4;
-  T* sp = src_bad + 4;
-  asm_rep_movs(dp, sp, 0);
-}
-
-} // End of anonymous namespace
-
-TEST(AddressSanitizer, asm_load_store) {
-  U4* buf = new U4[2];
-  EXPECT_DEATH(AsmLoad(&buf[3]), "READ of size 4");
-  EXPECT_DEATH(AsmStore(0x1234, &buf[3]), "WRITE of size 4");
-  delete [] buf;
-}
-
-TEST(AddressSanitizer, asm_rw) {
-  TestAsmWrite<U1>("WRITE of size 1");
-  TestAsmWrite<U2>("WRITE of size 2");
-  TestAsmWrite<U4>("WRITE of size 4");
-#if defined(__x86_64__)
-  TestAsmWrite<U8>("WRITE of size 8");
-#endif // defined(__x86_64__)
-  TestAsmWrite<__m128i>("WRITE of size 16");
-
-  TestAsmRead<U1>("READ of size 1");
-  TestAsmRead<U2>("READ of size 2");
-  TestAsmRead<U4>("READ of size 4");
-#if defined(__x86_64__)
-  TestAsmRead<U8>("READ of size 8");
-#endif // defined(__x86_64__)
-  TestAsmRead<__m128i>("READ of size 16");
-}
-
-TEST(AddressSanitizer, asm_flags) {
-  long magic = 0x1234;
-  long r = 0x0;
-
-#if defined(__x86_64__) && !defined(__ILP32__)
-  __asm__("xorq %%rax, %%rax  \n\t"
-          "movq (%[p]), %%rax \n\t"
-          "sete %%al          \n\t"
-          "movzbq %%al, %[r]  \n\t"
-          : [r] "=r"(r)
-          : [p] "r"(&magic)
-          : "rax", "memory");
-#else
-  __asm__("xorl %%eax, %%eax  \n\t"
-          "movl (%[p]), %%eax \n\t"
-          "sete %%al          \n\t"
-          "movzbl %%al, %[r]  \n\t"
-          : [r] "=r"(r)
-          : [p] "r"(&magic)
-          : "eax", "memory");
-#endif // defined(__x86_64__) && !defined(__ILP32__)
-
-  ASSERT_EQ(0x1, r);
-}
-
-TEST(AddressSanitizer, asm_rep_movs) {
-  TestAsmRepMovs<U1>("READ of size 1", "WRITE of size 1");
-  TestAsmRepMovs<U2>("READ of size 2", "WRITE of size 2");
-  TestAsmRepMovs<U4>("READ of size 4", "WRITE of size 4");
-#if defined(__x86_64__)
-  TestAsmRepMovs<U8>("READ of size 8", "WRITE of size 8");
-#endif  // defined(__x86_64__)
-}
-
-#endif // defined(__x86_64__) || (defined(__i386__) && defined(__SSE2__))
-
-#endif // defined(__linux__)

compiler-rt/test/asan/TestCases/Linux/asan-asm-stacktrace-test.cc

-// Check that a stack unwinding algorithm works corretly even with the assembly
-// instrumentation.
-
-// REQUIRES: x86_64-target-arch, shadow-scale-3
-// RUN: %clangxx_asan -g -O1 %s -fno-inline-functions -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -mllvm -asan-instrument-assembly -o %t && not %run %t 2>&1 | FileCheck %s
-// RUN: %clangxx_asan -g -O1 %s -fno-inline-functions -fomit-frame-pointer -momit-leaf-frame-pointer -mllvm -asan-instrument-assembly -o %t && not %run %t 2>&1 | FileCheck %s
-// RUN: %clangxx_asan -g0 -O1 %s -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-exceptions -fno-inline-functions -fomit-frame-pointer -momit-leaf-frame-pointer -mllvm -asan-instrument-assembly -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-nounwind
-
-#include <cstddef>
-
-// CHECK: READ of size 4
-// CHECK-NEXT: {{#0 0x[0-9a-fA-F]+ in foo}}
-// CHECK-NEXT: {{#1 0x[0-9a-fA-F]+ in main}}
-
-// CHECK-nounwind: READ of size 4
-// CHECK-nounwind-NEXT: {{#0 0x[0-9a-fA-F]+ in foo}}
-
-__attribute__((noinline)) int foo(size_t n, int *buffer) {
-  int r;
-  __asm__("movl (%[buffer], %[n], 4), %[r]  \n\t"
-          : [r] "=r"(r)
-          : [buffer] "r"(buffer), [n] "r"(n)
-          : "memory");
-  return r;
-}
-
-int main() {
-  const size_t n = 16;
-  int *buffer = new int[n];
-  foo(n, buffer);
-  delete[] buffer;
-  return 0;
-}

llvm/include/llvm/MC/MCParser/MCTargetAsmParser.h

public:
   // Target-specific parsing of expression.
   virtual bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) {
     return getParser().parsePrimaryExpr(Res, EndLoc);
   }
 
   virtual bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc,
                              SMLoc &EndLoc) = 0;
 
-  /// Sets frame register corresponding to the current MachineFunction.
-  virtual void SetFrameRegister(unsigned RegNo) {}
-
   /// ParseInstruction - Parse one assembly instruction.
   ///
   /// The parser is positioned following the instruction name. The target
   /// specific instruction parser should parse the entire instruction and
   /// construct the appropriate MCInst, or emit an error. On success, the entire
   /// line should be parsed up to and including the end-of-statement token. On
   /// failure, the parser is not required to read to the end of the line.
   //

llvm/include/llvm/MC/MCTargetOptions.h

 
 class MCTargetOptions {
 public:
   enum AsmInstrumentation {
     AsmInstrumentationNone,
     AsmInstrumentationAddress
   };
 
-  /// Enables AddressSanitizer instrumentation at machine level.
-  bool SanitizeAddress : 1;
-
   bool MCRelaxAll : 1;
   bool MCNoExecStack : 1;
   bool MCFatalWarnings : 1;
   bool MCNoWarn : 1;
   bool MCNoDeprecatedWarn : 1;
   bool MCSaveTempLabels : 1;
   bool MCUseDwarfDirectory : 1;
   bool MCIncrementalLinkerCompatible : 1;

llvm/include/llvm/MC/MCTargetOptionsCommandFlags.inc

 
 #ifndef LLVM_MC_MCTARGETOPTIONSCOMMANDFLAGS_H
 #define LLVM_MC_MCTARGETOPTIONSCOMMANDFLAGS_H
 
 #include "llvm/MC/MCTargetOptions.h"
 #include "llvm/Support/CommandLine.h"
 using namespace llvm;
 
-static cl::opt<MCTargetOptions::AsmInstrumentation> AsmInstrumentation(
-    "asm-instrumentation", cl::desc("Instrumentation of inline assembly and "
-                                    "assembly source files"),
-    cl::init(MCTargetOptions::AsmInstrumentationNone),
-    cl::values(clEnumValN(MCTargetOptions::AsmInstrumentationNone, "none",
-                          "no instrumentation at all"),
-               clEnumValN(MCTargetOptions::AsmInstrumentationAddress, "address",
-                          "instrument instructions with memory arguments")));
-
 static cl::opt<bool> RelaxAll("mc-relax-all",
                        cl::desc("When used with filetype=obj, "
                                 "relax all fixups in the emitted object file"));
 
 static cl::opt<bool> IncrementalLinkerCompatible(
     "incremental-linker-compatible",
     cl::desc(
         "When used with filetype=obj, "

 
 static cl::opt<std::string>
 ABIName("target-abi", cl::Hidden,
         cl::desc("The name of the ABI to be targeted from the backend."),
         cl::init(""));
 
 static MCTargetOptions InitMCTargetOptionsFromFlags() {
   MCTargetOptions Options;
-  Options.SanitizeAddress =
-      (AsmInstrumentation == MCTargetOptions::AsmInstrumentationAddress);
   Options.MCRelaxAll = RelaxAll;
   Options.MCIncrementalLinkerCompatible = IncrementalLinkerCompatible;
   Options.MCPIECopyRelocations = PIECopyRelocations;
   Options.DwarfVersion = DwarfVersion;
   Options.ShowMCInst = ShowMCInst;
   Options.ABIName = ABIName;
   Options.MCFatalWarnings = FatalWarnings;
   Options.MCNoWarn = NoWarn;
   Options.MCNoDeprecatedWarn = NoDeprecatedWarn;
   return Options;
 }
 
 #endif

llvm/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp

if (!TAP)
     report_fatal_error("Inline asm not supported by this streamer because"
                        " we don't have an asm parser for this target\n");
   Parser->setAssemblerDialect(Dialect);
   Parser->setTargetParser(*TAP.get());
   // Enable lexing Masm binary and hex integer literals in intel inline
   // assembly.
   if (Dialect == InlineAsm::AD_Intel)
     Parser->getLexer().setLexMasmIntegers(true);
-  if (MF) {
-    const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo();
-    TAP->SetFrameRegister(TRI->getFrameRegister(*MF));
-  }
 
   emitInlineAsmStart();
   // Don't implicitly switch to the text section before the asm.
   int Res = Parser->Run(/*NoInitialTextSection*/ true,
                         /*NoFinalize*/ true);
   emitInlineAsmEnd(STI, &TAP->getSTI());
 
   if (Res && !DiagInfo->DiagHandler)
void AsmPrinter::EmitInlineAsm(const MachineInstr *MI) const {
   InlineAsm::AsmDialect InlineAsmVariant = MI->getInlineAsmDialect();
   AsmPrinter *AP = const_cast<AsmPrinter*>(this);
   if (InlineAsmVariant == InlineAsm::AD_ATT)
     EmitGCCInlineAsmStr(AsmStr, MI, MMI, InlineAsmVariant, AsmPrinterVariant,
                         AP, LocCookie, OS);
   else
     EmitMSInlineAsmStr(AsmStr, MI, MMI, InlineAsmVariant, AP, LocCookie, OS);
 
-  // Reset SanitizeAddress based on the function's attribute.
-  MCTargetOptions MCOptions = TM.Options.MCOptions;
-  MCOptions.SanitizeAddress =
-      MF->getFunction().hasFnAttribute(Attribute::SanitizeAddress);
-
   // Emit warnings if we use reserved registers on the clobber list, as
   // that might give surprising results.
   std::vector<std::string> RestrRegs;
   // Start with the first operand descriptor, and iterate over them.
   for (unsigned I = InlineAsm::MIOp_FirstOperand, NumOps = MI->getNumOperands();
        I < NumOps; ++I) {
     const MachineOperand &MO = MI->getOperand(I);
     if (MO.isImm()) {
if (!RestrRegs.empty()) {
     }
     std::string Note = "Reserved registers on the clobber list may not be "
                 "preserved across the asm statement, and clobbering them may "
                 "lead to undefined behaviour.";
     SrcMgr.PrintMessage(Loc, SourceMgr::DK_Warning, Msg);
     SrcMgr.PrintMessage(Loc, SourceMgr::DK_Note, Note);
   }
 
-  EmitInlineAsm(OS.str(), getSubtargetInfo(), MCOptions, LocMD,
+  EmitInlineAsm(OS.str(), getSubtargetInfo(), TM.Options.MCOptions, LocMD,
                 MI->getInlineAsmDialect());
 
   // Emit the #NOAPP end marker.  This has to happen even if verbose-asm isn't
   // enabled, so we use emitRawComment.
   OutStreamer->emitRawComment(MAI->getInlineAsmEnd());
 }
 
 

llvm/lib/MC/MCTargetOptions.cpp

 //===- lib/MC/MCTargetOptions.cpp - MC Target Options ---------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
 #include "llvm/MC/MCTargetOptions.h"
 #include "llvm/ADT/StringRef.h"
 
 using namespace llvm;
 
 MCTargetOptions::MCTargetOptions()
-    : SanitizeAddress(false), MCRelaxAll(false), MCNoExecStack(false),
-      MCFatalWarnings(false), MCNoWarn(false), MCNoDeprecatedWarn(false),
-      MCSaveTempLabels(false), MCUseDwarfDirectory(false),
-      MCIncrementalLinkerCompatible(false), MCPIECopyRelocations(false),
-      ShowMCEncoding(false), ShowMCInst(false), AsmVerbose(false),
-      PreserveAsmComments(true) {}
+    : MCRelaxAll(false), MCNoExecStack(false), MCFatalWarnings(false),
+      MCNoWarn(false), MCNoDeprecatedWarn(false), MCSaveTempLabels(false),
+      MCUseDwarfDirectory(false), MCIncrementalLinkerCompatible(false),
+      MCPIECopyRelocations(false), ShowMCEncoding(false), ShowMCInst(false),
+      AsmVerbose(false), PreserveAsmComments(true) {}
 
 StringRef MCTargetOptions::getABIName() const {
   return ABIName;
 }

llvm/lib/Target/X86/AsmParser/CMakeLists.txt

 add_llvm_library(LLVMX86AsmParser
-  X86AsmInstrumentation.cpp
   X86AsmParser.cpp
   )

llvm/lib/Target/X86/AsmParser/X86AsmInstrumentation.h

-//===- X86AsmInstrumentation.h - Instrument X86 inline assembly -*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_LIB_TARGET_X86_ASMPARSER_X86ASMINSTRUMENTATION_H
-#define LLVM_LIB_TARGET_X86_ASMPARSER_X86ASMINSTRUMENTATION_H
-
-#include "llvm/ADT/SmallVector.h"
-#include <memory>
-
-namespace llvm {
-
-class MCContext;
-class MCInst;
-class MCInstrInfo;
-class MCParsedAsmOperand;
-class MCStreamer;
-class MCSubtargetInfo;
-class MCTargetOptions;
-class X86AsmInstrumentation;
-
-X86AsmInstrumentation *
-CreateX86AsmInstrumentation(const MCTargetOptions &MCOptions,
-                            const MCContext &Ctx,
-                            const MCSubtargetInfo *&STI);
-
-class X86AsmInstrumentation {
-public:
-  virtual ~X86AsmInstrumentation();
-
-  // Sets frame register corresponding to a current frame.
-  void SetInitialFrameRegister(unsigned RegNo) {
-    InitialFrameReg = RegNo;
-  }
-
-  // Tries to instrument and emit instruction.
-  virtual void InstrumentAndEmitInstruction(
-      const MCInst &Inst,
-      SmallVectorImpl<std::unique_ptr<MCParsedAsmOperand>> &Operands,
-      MCContext &Ctx, const MCInstrInfo &MII, MCStreamer &Out);
-
-protected:
-  friend X86AsmInstrumentation *
-  CreateX86AsmInstrumentation(const MCTargetOptions &MCOptions,
-                              const MCContext &Ctx,
-                              const MCSubtargetInfo *&STI);
-
-  X86AsmInstrumentation(const MCSubtargetInfo *&STI);
-
-  unsigned GetFrameRegGeneric(const MCContext &Ctx, MCStreamer &Out);
-
-  void EmitInstruction(MCStreamer &Out, const MCInst &Inst);
-
-  const MCSubtargetInfo *&STI;
-
-  unsigned InitialFrameReg = 0;
-};
-
-} // end namespace llvm
-
-#endif // LLVM_LIB_TARGET_X86_ASMPARSER_X86ASMINSTRUMENTATION_H

llvm/lib/Target/X86/AsmParser/X86AsmInstrumentation.cpp

-//===-- X86AsmInstrumentation.cpp - Instrument X86 inline assembly --------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "X86AsmInstrumentation.h"
-#include "MCTargetDesc/X86MCTargetDesc.h"
-#include "X86Operand.h"
-#include "llvm/ADT/Triple.h"
-#include "llvm/ADT/Twine.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCDwarf.h"
-#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCInst.h"
-#include "llvm/MC/MCInstBuilder.h"
-#include "llvm/MC/MCInstrInfo.h"
-#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
-#include "llvm/MC/MCParser/MCTargetAsmParser.h"
-#include "llvm/MC/MCRegisterInfo.h"
-#include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCSubtargetInfo.h"
-#include "llvm/MC/MCTargetOptions.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/SMLoc.h"
-#include <algorithm>
-#include <cassert>
-#include <cstdint>
-#include <limits>
-#include <memory>
-#include <vector>
-
-// Following comment describes how assembly instrumentation works.
-// Currently we have only AddressSanitizer instrumentation, but we're
-// planning to implement MemorySanitizer for inline assembly too. If
-// you're not familiar with AddressSanitizer algorithm, please, read
-// https://github.com/google/sanitizers/wiki/AddressSanitizerAlgorithm
-//
-// When inline assembly is parsed by an instance of X86AsmParser, all
-// instructions are emitted via EmitInstruction method. That's the
-// place where X86AsmInstrumentation analyzes an instruction and
-// decides, whether the instruction should be emitted as is or
-// instrumentation is required. The latter case happens when an
-// instruction reads from or writes to memory. Now instruction opcode
-// is explicitly checked, and if an instruction has a memory operand
-// (for instance, movq (%rsi, %rcx, 8), %rax) - it should be
-// instrumented.  There're also exist instructions that modify
-// memory but don't have an explicit memory operands, for instance,
-// movs.
-//
-// Let's consider at first 8-byte memory accesses when an instruction
-// has an explicit memory operand. In this case we need two registers -
-// AddressReg to compute address of a memory cells which are accessed
-// and ShadowReg to compute corresponding shadow address. So, we need
-// to spill both registers before instrumentation code and restore them
-// after instrumentation. Thus, in general, instrumentation code will
-// look like this:
-// PUSHF  # Store flags, otherwise they will be overwritten
-// PUSH AddressReg  # spill AddressReg
-// PUSH ShadowReg   # spill ShadowReg
-// LEA MemOp, AddressReg  # compute address of the memory operand
-// MOV AddressReg, ShadowReg
-// SHR ShadowReg, 3
-// # ShadowOffset(AddressReg >> 3) contains address of a shadow
-// # corresponding to MemOp.
-// CMP ShadowOffset(ShadowReg), 0  # test shadow value
-// JZ .Done  # when shadow equals to zero, everything is fine
-// MOV AddressReg, RDI
-// # Call __asan_report function with AddressReg as an argument
-// CALL __asan_report
-// .Done:
-// POP ShadowReg  # Restore ShadowReg
-// POP AddressReg  # Restore AddressReg
-// POPF  # Restore flags
-//
-// Memory accesses with different size (1-, 2-, 4- and 16-byte) are
-// handled in a similar manner, but small memory accesses (less than 8
-// byte) require an additional ScratchReg, which is used for shadow value.
-//
-// If, suppose, we're instrumenting an instruction like movs, only
-// contents of RDI, RDI + AccessSize * RCX, RSI, RSI + AccessSize *
-// RCX are checked.  In this case there're no need to spill and restore
-// AddressReg , ShadowReg or flags four times, they're saved on stack
-// just once, before instrumentation of these four addresses, and restored
-// at the end of the instrumentation.
-//
-// There exist several things which complicate this simple algorithm.
-// * Instrumented memory operand can have RSP as a base or an index
-//   register.  So we need to add a constant offset before computation
-//   of memory address, since flags, AddressReg, ShadowReg, etc. were
-//   already stored on stack and RSP was modified.
-// * Debug info (usually, DWARF) should be adjusted, because sometimes
-//   RSP is used as a frame register. So, we need to select some
-//   register as a frame register and temprorary override current CFA
-//   register.
-
-using namespace llvm;
-
-static cl::opt<bool> ClAsanInstrumentAssembly(
-    "asan-instrument-assembly",
-    cl::desc("instrument assembly with AddressSanitizer checks"), cl::Hidden,
-    cl::init(false));
-
-static const int64_t MinAllowedDisplacement =
-    std::numeric_limits<int32_t>::min();
-static const int64_t MaxAllowedDisplacement =
-    std::numeric_limits<int32_t>::max();
-
-static int64_t ApplyDisplacementBounds(int64_t Displacement) {
-  return std::max(std::min(MaxAllowedDisplacement, Displacement),
-                  MinAllowedDisplacement);
-}
-
-static void CheckDisplacementBounds(int64_t Displacement) {
-  assert(Displacement >= MinAllowedDisplacement &&
-         Displacement <= MaxAllowedDisplacement);
-}
-
-static bool IsStackReg(unsigned Reg) {
-  return Reg == X86::RSP || Reg == X86::ESP;
-}
-
-static bool IsSmallMemAccess(unsigned AccessSize) { return AccessSize < 8; }
-
-namespace {
-
-class X86AddressSanitizer : public X86AsmInstrumentation {
-public:
-  struct RegisterContext {
-  private:
-    enum RegOffset {
-      REG_OFFSET_ADDRESS = 0,
-      REG_OFFSET_SHADOW,
-      REG_OFFSET_SCRATCH
-    };
-
-  public:
-    RegisterContext(unsigned AddressReg, unsigned ShadowReg,
-                    unsigned ScratchReg) {
-      BusyRegs.push_back(convReg(AddressReg, 64));
-      BusyRegs.push_back(convReg(ShadowReg, 64));
-      BusyRegs.push_back(convReg(ScratchReg, 64));
-    }
-
-    unsigned AddressReg(unsigned Size) const {
-      return convReg(BusyRegs[REG_OFFSET_ADDRESS], Size);
-    }
-
-    unsigned ShadowReg(unsigned Size) const {
-      return convReg(BusyRegs[REG_OFFSET_SHADOW], Size);
-    }
-
-    unsigned ScratchReg(unsigned Size) const {
-      return convReg(BusyRegs[REG_OFFSET_SCRATCH], Size);
-    }
-
-    void AddBusyReg(unsigned Reg) {
-      if (Reg != X86::NoRegister)
-        BusyRegs.push_back(convReg(Reg, 64));
-    }
-
-    void AddBusyRegs(const X86Operand &Op) {
-      AddBusyReg(Op.getMemBaseReg());
-      AddBusyReg(Op.getMemIndexReg());
-    }
-
-    unsigned ChooseFrameReg(unsigned Size) const {
-      static const MCPhysReg Candidates[] = { X86::RBP, X86::RAX, X86::RBX,
-                                              X86::RCX, X86::RDX, X86::RDI,
-                                              X86::RSI };
-      for (unsigned Reg : Candidates) {
-        if (!std::count(BusyRegs.begin(), BusyRegs.end(), Reg))
-          return convReg(Reg, Size);
-      }
-      return X86::NoRegister;
-    }
-
-  private:
-    unsigned convReg(unsigned Reg, unsigned Size) const {
-      return Reg == X86::NoRegister ? Reg : getX86SubSuperRegister(Reg, Size);
-    }
-
-    std::vector<unsigned> BusyRegs;
-  };
-
-  X86AddressSanitizer(const MCSubtargetInfo *&STI)
-      : X86AsmInstrumentation(STI), RepPrefix(false), OrigSPOffset(0) {}
-
-  ~X86AddressSanitizer() override = default;
-
-  // X86AsmInstrumentation implementation:
-  void InstrumentAndEmitInstruction(const MCInst &Inst, OperandVector &Operands,
-                                    MCContext &Ctx, const MCInstrInfo &MII,
-                                    MCStreamer &Out) override {
-    InstrumentMOVS(Inst, Operands, Ctx, MII, Out);
-    if (RepPrefix)
-      EmitInstruction(Out, MCInstBuilder(X86::REP_PREFIX));
-
-    InstrumentMOV(Inst, Operands, Ctx, MII, Out);
-
-    RepPrefix = (Inst.getOpcode() == X86::REP_PREFIX);
-    if (!RepPrefix)
-      EmitInstruction(Out, Inst);
-  }
-
-  // Adjusts up stack and saves all registers used in instrumentation.
-  virtual void InstrumentMemOperandPrologue(const RegisterContext &RegCtx,
-                                            MCContext &Ctx,
-                                            MCStreamer &Out) = 0;
-
-  // Restores all registers used in instrumentation and adjusts stack.
-  virtual void InstrumentMemOperandEpilogue(const RegisterContext &RegCtx,
-                                            MCContext &Ctx,
-                                            MCStreamer &Out) = 0;
-
-  virtual void InstrumentMemOperandSmall(X86Operand &Op, unsigned AccessSize,
-                                         bool IsWrite,
-                                         const RegisterContext &RegCtx,
-                                         MCContext &Ctx, MCStreamer &Out) = 0;
-  virtual void InstrumentMemOperandLarge(X86Operand &Op, unsigned AccessSize,
-                                         bool IsWrite,
-                                         const RegisterContext &RegCtx,
-                                         MCContext &Ctx, MCStreamer &Out) = 0;
-
-  virtual void InstrumentMOVSImpl(unsigned AccessSize, MCContext &Ctx,
-                                  MCStreamer &Out) = 0;
-
-  void InstrumentMemOperand(X86Operand &Op, unsigned AccessSize, bool IsWrite,
-                            const RegisterContext &RegCtx, MCContext &Ctx,
-                            MCStreamer &Out);
-  void InstrumentMOVSBase(unsigned DstReg, unsigned SrcReg, unsigned CntReg,
-                          unsigned AccessSize, MCContext &Ctx, MCStreamer &Out);
-
-  void InstrumentMOVS(const MCInst &Inst, OperandVector &Operands,
-                      MCContext &Ctx, const MCInstrInfo &MII, MCStreamer &Out);
-  void InstrumentMOV(const MCInst &Inst, OperandVector &Operands,
-                     MCContext &Ctx, const MCInstrInfo &MII, MCStreamer &Out);
-
-protected:
-  void EmitLabel(MCStreamer &Out, MCSymbol *Label) { Out.EmitLabel(Label); }
-
-  void EmitLEA(X86Operand &Op, unsigned Size, unsigned Reg, MCStreamer &Out) {
-    assert(Size == 32 || Size == 64);
-    MCInst Inst;
-    Inst.setOpcode(Size == 32 ? X86::LEA32r : X86::LEA64r);
-    Inst.addOperand(MCOperand::createReg(getX86SubSuperRegister(Reg, Size)));
-    Op.addMemOperands(Inst, 5);
-    EmitInstruction(Out, Inst);
-  }
-
-  void ComputeMemOperandAddress(X86Operand &Op, unsigned Size,
-                                unsigned Reg, MCContext &Ctx, MCStreamer &Out);
-
-  // Creates new memory operand with Displacement added to an original
-  // displacement. Residue will contain a residue which could happen when the
-  // total displacement exceeds 32-bit limitation.
-  std::unique_ptr<X86Operand> AddDisplacement(X86Operand &Op,
-                                              int64_t Displacement,
-                                              MCContext &Ctx, int64_t *Residue);
-
-  bool is64BitMode() const {
-    return STI->getFeatureBits()[X86::Mode64Bit];
-  }
-
-  bool is32BitMode() const {
-    return STI->getFeatureBits()[X86::Mode32Bit];
-  }
-
-  bool is16BitMode() const {
-    return STI->getFeatureBits()[X86::Mode16Bit];
-  }
-
-  unsigned getPointerWidth() {
-    if (is16BitMode()) return 16;
-    if (is32BitMode()) return 32;
-    if (is64BitMode()) return 64;
-    llvm_unreachable("invalid mode");
-  }
-
-  // True when previous instruction was actually REP prefix.
-  bool RepPrefix;
-
-  // Offset from the original SP register.
-  int64_t OrigSPOffset;
-};
-
-void X86AddressSanitizer::InstrumentMemOperand(
-    X86Operand &Op, unsigned AccessSize, bool IsWrite,
-    const RegisterContext &RegCtx, MCContext &Ctx, MCStreamer &Out) {
-  assert(Op.isMem() && "Op should be a memory operand.");
-  assert((AccessSize & (AccessSize - 1)) == 0 && AccessSize <= 16 &&
-         "AccessSize should be a power of two, less or equal than 16.");
-  // FIXME: take into account load/store alignment.
-  if (IsSmallMemAccess(AccessSize))
-    InstrumentMemOperandSmall(Op, AccessSize, IsWrite, RegCtx, Ctx, Out);
-  else
-    InstrumentMemOperandLarge(Op, AccessSize, IsWrite, RegCtx, Ctx, Out);
-}
-
-void X86AddressSanitizer::InstrumentMOVSBase(unsigned DstReg, unsigned SrcReg,
-                                             unsigned CntReg,
-                                             unsigned AccessSize,
-                                             MCContext &Ctx, MCStreamer &Out) {
-  // FIXME: check whole ranges [DstReg .. DstReg + AccessSize * (CntReg - 1)]
-  // and [SrcReg .. SrcReg + AccessSize * (CntReg - 1)].
-  RegisterContext RegCtx(X86::RDX /* AddressReg */, X86::RAX /* ShadowReg */,
-                         IsSmallMemAccess(AccessSize)
-                             ? X86::RBX
-                             : X86::NoRegister /* ScratchReg */);
-  RegCtx.AddBusyReg(DstReg);
-  RegCtx.AddBusyReg(SrcReg);
-  RegCtx.AddBusyReg(CntReg);
-
-  InstrumentMemOperandPrologue(RegCtx, Ctx, Out);
-
-  // Test (%SrcReg)
-  {
-    const MCExpr *Disp = MCConstantExpr::create(0, Ctx);
-    std::unique_ptr<X86Operand> Op(X86Operand::CreateMem(
-        getPointerWidth(), 0, Disp, SrcReg, 0, AccessSize, SMLoc(), SMLoc()));
-    InstrumentMemOperand(*Op, AccessSize, false /* IsWrite */, RegCtx, Ctx,
-                         Out);
-  }
-
-  // Test -1(%SrcReg, %CntReg, AccessSize)
-  {
-    const MCExpr *Disp = MCConstantExpr::create(-1, Ctx);
-    std::unique_ptr<X86Operand> Op(X86Operand::CreateMem(
-        getPointerWidth(), 0, Disp, SrcReg, CntReg, AccessSize, SMLoc(),
-        SMLoc()));
-    InstrumentMemOperand(*Op, AccessSize, false /* IsWrite */, RegCtx, Ctx,
-                         Out);
-  }
-
-  // Test (%DstReg)
-  {
-    const MCExpr *Disp = MCConstantExpr::create(0, Ctx);
-    std::unique_ptr<X86Operand> Op(X86Operand::CreateMem(
-        getPointerWidth(), 0, Disp, DstReg, 0, AccessSize, SMLoc(), SMLoc()));
-    InstrumentMemOperand(*Op, AccessSize, true /* IsWrite */, RegCtx, Ctx, Out);
-  }
-
-  // Test -1(%DstReg, %CntReg, AccessSize)
-  {
-    const MCExpr *Disp = MCConstantExpr::create(-1, Ctx);
-    std::unique_ptr<X86Operand> Op(X86Operand::CreateMem(
-        getPointerWidth(), 0, Disp, DstReg, CntReg, AccessSize, SMLoc(),
-        SMLoc()));
-    InstrumentMemOperand(*Op, AccessSize, true /* IsWrite */, RegCtx, Ctx, Out);
-  }
-
-  InstrumentMemOperandEpilogue(RegCtx, Ctx, Out);
-}
-
-void X86AddressSanitizer::InstrumentMOVS(const MCInst &Inst,
-                                         OperandVector &Operands,
-                                         MCContext &Ctx, const MCInstrInfo &MII,
-                                         MCStreamer &Out) {
-  // Access size in bytes.
-  unsigned AccessSize = 0;
-
-  switch (Inst.getOpcode()) {
-  case X86::MOVSB:
-    AccessSize = 1;
-    break;
-  case X86::MOVSW:
-    AccessSize = 2;
-    break;
-  case X86::MOVSL:
-    AccessSize = 4;
-    break;
-  case X86::MOVSQ:
-    AccessSize = 8;
-    break;
-  default:
-    return;
-  }
-
-  InstrumentMOVSImpl(AccessSize, Ctx, Out);
-}
-
-void X86AddressSanitizer::InstrumentMOV(const MCInst &Inst,
-                                        OperandVector &Operands, MCContext &Ctx,
-                                        const MCInstrInfo &MII,
-                                        MCStreamer &Out) {
-  // Access size in bytes.
-  unsigned AccessSize = 0;
-
-  switch (Inst.getOpcode()) {
-  case X86::MOV8mi:
-  case X86::MOV8mr:
-  case X86::MOV8rm:
-    AccessSize = 1;
-    break;
-  case X86::MOV16mi:
-  case X86::MOV16mr:
-  case X86::MOV16rm:
-    AccessSize = 2;
-    break;
-  case X86::MOV32mi:
-  case X86::MOV32mr:
-  case X86::MOV32rm:
-    AccessSize = 4;
-    break;
-  case X86::MOV64mi32:
-  case X86::MOV64mr:
-  case X86::MOV64rm:
-    AccessSize = 8;
-    break;
-  case X86::MOVAPDmr:
-  case X86::MOVAPSmr:
-  case X86::MOVAPDrm:
-  case X86::MOVAPSrm:
-    AccessSize = 16;
-    break;
-  default:
-    return;
-  }
-
-  const bool IsWrite = MII.get(Inst.getOpcode()).mayStore();
-
-  for (unsigned Ix = 0; Ix < Operands.size(); ++Ix) {
-    assert(Operands[Ix]);
-    MCParsedAsmOperand &Op = *Operands[Ix];
-    if (Op.isMem()) {
-      X86Operand &MemOp = static_cast<X86Operand &>(Op);
-      RegisterContext RegCtx(
-          X86::RDI /* AddressReg */, X86::RAX /* ShadowReg */,
-          IsSmallMemAccess(AccessSize) ? X86::RCX
-                                       : X86::NoRegister /* ScratchReg */);
-      RegCtx.AddBusyRegs(MemOp);
-      InstrumentMemOperandPrologue(RegCtx, Ctx, Out);
-      InstrumentMemOperand(MemOp, AccessSize, IsWrite, RegCtx, Ctx, Out);
-      InstrumentMemOperandEpilogue(RegCtx, Ctx, Out);
-    }
-  }
-}
-
-void X86AddressSanitizer::ComputeMemOperandAddress(X86Operand &Op,
-                                                   unsigned Size,
-                                                   unsigned Reg, MCContext &Ctx,
-                                                   MCStreamer &Out) {
-  int64_t Displacement = 0;
-  if (IsStackReg(Op.getMemBaseReg()))
-    Displacement -= OrigSPOffset;
-  if (IsStackReg(Op.getMemIndexReg()))
-    Displacement -= OrigSPOffset * Op.getMemScale();
-
-  assert(Displacement >= 0);
-
-  // Emit Op as is.
-  if (Displacement == 0) {
-    EmitLEA(Op, Size, Reg, Out);
-    return;
-  }
-
-  int64_t Residue;
-  std::unique_ptr<X86Operand> NewOp =
-      AddDisplacement(Op, Displacement, Ctx, &Residue);
-  EmitLEA(*NewOp, Size, Reg, Out);
-
-  while (Residue != 0) {
-    const MCConstantExpr *Disp =
-        MCConstantExpr::create(ApplyDisplacementBounds(Residue), Ctx);
-    std::unique_ptr<X86Operand> DispOp =
-        X86Operand::CreateMem(getPointerWidth(), 0, Disp, Reg, 0, 1, SMLoc(),
-                              SMLoc());
-    EmitLEA(*DispOp, Size, Reg, Out);
-    Residue -= Disp->getValue();
-  }
-}
-
-std::unique_ptr<X86Operand>
-X86AddressSanitizer::AddDisplacement(X86Operand &Op, int64_t Displacement,
-                                     MCContext &Ctx, int64_t *Residue) {
-  assert(Displacement >= 0);
-
-  if (Displacement == 0 ||
-      (Op.getMemDisp() && Op.getMemDisp()->getKind() != MCExpr::Constant)) {
-    *Residue = Displacement;
-    return X86Operand::CreateMem(Op.getMemModeSize(), Op.getMemSegReg(),
-                                 Op.getMemDisp(), Op.getMemBaseReg(),
-                                 Op.getMemIndexReg(), Op.getMemScale(),
-                                 SMLoc(), SMLoc());
-  }
-
-  int64_t OrigDisplacement =
-      static_cast<const MCConstantExpr *>(Op.getMemDisp())->getValue();
-  CheckDisplacementBounds(OrigDisplacement);
-  Displacement += OrigDisplacement;
-
-  int64_t NewDisplacement = ApplyDisplacementBounds(Displacement);
-  CheckDisplacementBounds(NewDisplacement);
-
-  *Residue = Displacement - NewDisplacement;
-  const MCExpr *Disp = MCConstantExpr::create(NewDisplacement, Ctx);
-  return X86Operand::CreateMem(Op.getMemModeSize(), Op.getMemSegReg(), Disp,
-                               Op.getMemBaseReg(), Op.getMemIndexReg(),
-                               Op.getMemScale(), SMLoc(), SMLoc());
-}
-
-class X86AddressSanitizer32 : public X86AddressSanitizer {
-public:
-  static const long kShadowOffset = 0x20000000;
-
-  X86AddressSanitizer32(const MCSubtargetInfo *&STI)
-      : X86AddressSanitizer(STI) {}
-
-  ~X86AddressSanitizer32() override = default;
-
-  unsigned GetFrameReg(const MCContext &Ctx, MCStreamer &Out) {
-    unsigned FrameReg = GetFrameRegGeneric(Ctx, Out);
-    if (FrameReg == X86::NoRegister)
-      return FrameReg;
-    return getX86SubSuperRegister(FrameReg, 32);
-  }
-
-  void SpillReg(MCStreamer &Out, unsigned Reg) {
-    EmitInstruction(Out, MCInstBuilder(X86::PUSH32r).addReg(Reg));
-    OrigSPOffset -= 4;
-  }
-
-  void RestoreReg(MCStreamer &Out, unsigned Reg) {
-    EmitInstruction(Out, MCInstBuilder(X86::POP32r).addReg(Reg));
-    OrigSPOffset += 4;
-  }
-
-  void StoreFlags(MCStreamer &Out) {
-    EmitInstruction(Out, MCInstBuilder(X86::PUSHF32));
-    OrigSPOffset -= 4;
-  }
-
-  void RestoreFlags(MCStreamer &Out) {
-    EmitInstruction(Out, MCInstBuilder(X86::POPF32));
-    OrigSPOffset += 4;
-  }
-
-  void InstrumentMemOperandPrologue(const RegisterContext &RegCtx,
-                                    MCContext &Ctx,
-                                    MCStreamer &Out) override {
-    unsigned LocalFrameReg = RegCtx.ChooseFrameReg(32);
-    assert(LocalFrameReg != X86::NoRegister);
-
-    const MCRegisterInfo *MRI = Ctx.getRegisterInfo();
-    unsigned FrameReg = GetFrameReg(Ctx, Out);
-    if (MRI && FrameReg != X86::NoRegister) {
-      SpillReg(Out, LocalFrameReg);
-      if (FrameReg == X86::ESP) {
-        Out.EmitCFIAdjustCfaOffset(4 /* byte size of the LocalFrameReg */);
-        Out.EmitCFIRelOffset(
-            MRI->getDwarfRegNum(LocalFrameReg, true /* IsEH */), 0);
-      }
-      EmitInstruction(
-          Out,
-          MCInstBuilder(X86::MOV32rr).addReg(LocalFrameReg).addReg(FrameReg));
-      Out.EmitCFIRememberState();
-      Out.EmitCFIDefCfaRegister(
-          MRI->getDwarfRegNum(LocalFrameReg, true /* IsEH */));
-    }
-
-    SpillReg(Out, RegCtx.AddressReg(32));
-    SpillReg(Out, RegCtx.ShadowReg(32));
-    if (RegCtx.ScratchReg(32) != X86::NoRegister)
-      SpillReg(Out, RegCtx.ScratchReg(32));
-    StoreFlags(Out);
-  }
-
-  void InstrumentMemOperandEpilogue(const RegisterContext &RegCtx,
-                                    MCContext &Ctx,
-                                    MCStreamer &Out) override {
-    unsigned LocalFrameReg = RegCtx.ChooseFrameReg(32);
-    assert(LocalFrameReg != X86::NoRegister);
-
-    RestoreFlags(Out);
-    if (RegCtx.ScratchReg(32) != X86::NoRegister)
-      RestoreReg(Out, RegCtx.ScratchReg(32));
-    RestoreReg(Out, RegCtx.ShadowReg(32));
-    RestoreReg(Out, RegCtx.AddressReg(32));
-
-    unsigned FrameReg = GetFrameReg(Ctx, Out);
-    if (Ctx.getRegisterInfo() && FrameReg != X86::NoRegister) {
-      RestoreReg(Out, LocalFrameReg);
-      Out.EmitCFIRestoreState();
-      if (FrameReg == X86::ESP)
-        Out.EmitCFIAdjustCfaOffset(-4 /* byte size of the LocalFrameReg */);
-    }
-  }
-
-  void InstrumentMemOperandSmall(X86Operand &Op, unsigned AccessSize,
-                                 bool IsWrite,
-                                 const RegisterContext &RegCtx,
-                                 MCContext &Ctx,
-                                 MCStreamer &Out) override;
-  void InstrumentMemOperandLarge(X86Operand &Op, unsigned AccessSize,
-                                 bool IsWrite,
-                                 const RegisterContext &RegCtx,
-                                 MCContext &Ctx,
-                                 MCStreamer &Out) override;
-  void InstrumentMOVSImpl(unsigned AccessSize, MCContext &Ctx,
-                          MCStreamer &Out) override;
-
-private:
-  void EmitCallAsanReport(unsigned AccessSize, bool IsWrite, MCContext &Ctx,
-                          MCStreamer &Out, const RegisterContext &RegCtx) {
-    EmitInstruction(Out, MCInstBuilder(X86::CLD));
-    EmitInstruction(Out, MCInstBuilder(X86::MMX_EMMS));
-
-    EmitInstruction(Out, MCInstBuilder(X86::AND32ri8)
-                             .addReg(X86::ESP)
-                             .addReg(X86::ESP)
-                             .addImm(-16));
-    EmitInstruction(
-        Out, MCInstBuilder(X86::PUSH32r).addReg(RegCtx.AddressReg(32)));
-
-    MCSymbol *FnSym = Ctx.getOrCreateSymbol(Twine("__asan_report_") +
-                                            (IsWrite ? "store" : "load") +
-                                            Twine(AccessSize));
-    const MCSymbolRefExpr *FnExpr =
-        MCSymbolRefExpr::create(FnSym, MCSymbolRefExpr::VK_PLT, Ctx);
-    EmitInstruction(Out, MCInstBuilder(X86::CALLpcrel32).addExpr(FnExpr));
-  }
-};
-
-void X86AddressSanitizer32::InstrumentMemOperandSmall(
-    X86Operand &Op, unsigned AccessSize, bool IsWrite,
-    const RegisterContext &RegCtx, MCContext &Ctx, MCStreamer &Out) {
-  unsigned AddressRegI32 = RegCtx.AddressReg(32);
-  unsigned ShadowRegI32 = RegCtx.ShadowReg(32);
-  unsigned ShadowRegI8 = RegCtx.ShadowReg(8);
-
-  assert(RegCtx.ScratchReg(32) != X86::NoRegister);
-  unsigned ScratchRegI32 = RegCtx.ScratchReg(32);
-
-  ComputeMemOperandAddress(Op, 32, AddressRegI32, Ctx, Out);
-
-  EmitInstruction(Out, MCInstBuilder(X86::MOV32rr).addReg(ShadowRegI32).addReg(
-                           AddressRegI32));
-  EmitInstruction(Out, MCInstBuilder(X86::SHR32ri)
-                           .addReg(ShadowRegI32)
-                           .addReg(ShadowRegI32)
-                           .addImm(3));
-
-  {
-    MCInst Inst;
-    Inst.setOpcode(X86::MOV8rm);
-    Inst.addOperand(MCOperand::createReg(ShadowRegI8));
-    const MCExpr *Disp = MCConstantExpr::create(kShadowOffset, Ctx);
-    std::unique_ptr<X86Operand> Op(
-        X86Operand::CreateMem(getPointerWidth(), 0, Disp, ShadowRegI32, 0, 1,
-                              SMLoc(), SMLoc()));
-    Op->addMemOperands(Inst, 5);
-    EmitInstruction(Out, Inst);
-  }
-
-  EmitInstruction(
-      Out, MCInstBuilder(X86::TEST8rr).addReg(ShadowRegI8).addReg(ShadowRegI8));
-  MCSymbol *DoneSym = Ctx.createTempSymbol();
-  const MCExpr *DoneExpr = MCSymbolRefExpr::create(DoneSym, Ctx);
-  EmitInstruction(Out, MCInstBuilder(X86::JE_1).addExpr(DoneExpr));
-
-  EmitInstruction(Out, MCInstBuilder(X86::MOV32rr).addReg(ScratchRegI32).addReg(
-                           AddressRegI32));
-  EmitInstruction(Out, MCInstBuilder(X86::AND32ri)
-                           .addReg(ScratchRegI32)
-                           .addReg(ScratchRegI32)
-                           .addImm(7));
-
-  switch (AccessSize) {
-  default: llvm_unreachable("Incorrect access size");
-  case 1:
-    break;
-  case 2: {
-    const MCExpr *Disp = MCConstantExpr::create(1, Ctx);
-    std::unique_ptr<X86Operand> Op(
-        X86Operand::CreateMem(getPointerWidth(), 0, Disp, ScratchRegI32, 0, 1,
-                              SMLoc(), SMLoc()));
-    EmitLEA(*Op, 32, ScratchRegI32, Out);
-    break;
-  }
-  case 4:
-    EmitInstruction(Out, MCInstBuilder(X86::ADD32ri8)
-                             .addReg(ScratchRegI32)
-                             .addReg(ScratchRegI32)
-                             .addImm(3));
-    break;
-  }
-
-  EmitInstruction(
-      Out,
-      MCInstBuilder(X86::MOVSX32rr8).addReg(ShadowRegI32).addReg(ShadowRegI8));
-  EmitInstruction(Out, MCInstBuilder(X86::CMP32rr).addReg(ScratchRegI32).addReg(
-                           ShadowRegI32));
-  EmitInstruction(Out, MCInstBuilder(X86::JL_1).addExpr(DoneExpr));
-
-  EmitCallAsanReport(AccessSize, IsWrite, Ctx, Out, RegCtx);
-  EmitLabel(Out, DoneSym);
-}
-
-void X86AddressSanitizer32::InstrumentMemOperandLarge(
-    X86Operand &Op, unsigned AccessSize, bool IsWrite,
-    const RegisterContext &RegCtx, MCContext &Ctx, MCStreamer &Out) {
-  unsigned AddressRegI32 = RegCtx.AddressReg(32);
-  unsigned ShadowRegI32 = RegCtx.ShadowReg(32);
-
-  ComputeMemOperandAddress(Op, 32, AddressRegI32, Ctx, Out);
-
-  EmitInstruction(Out, MCInstBuilder(X86::MOV32rr).addReg(ShadowRegI32).addReg(
-                           AddressRegI32));
-  EmitInstruction(Out, MCInstBuilder(X86::SHR32ri)
-                           .addReg(ShadowRegI32)
-                           .addReg(ShadowRegI32)
-                           .addImm(3));
-  {
-    MCInst Inst;
-    switch (AccessSize) {
-    default: llvm_unreachable("Incorrect access size");
-    case 8:
-      Inst.setOpcode(X86::CMP8mi);
-      break;
-    case 16:
-      Inst.setOpcode(X86::CMP16mi);
-      break;
-    }
-    const MCExpr *Disp = MCConstantExpr::create(kShadowOffset, Ctx);
-    std::unique_ptr<X86Operand> Op(
-        X86Operand::CreateMem(getPointerWidth(), 0, Disp, ShadowRegI32, 0, 1,
-                              SMLoc(), SMLoc()));
-    Op->addMemOperands(Inst, 5);
-    Inst.addOperand(MCOperand::createImm(0));
-    EmitInstruction(Out, Inst);
-  }
-  MCSymbol *DoneSym = Ctx.createTempSymbol();
-  const MCExpr *DoneExpr = MCSymbolRefExpr::create(DoneSym, Ctx);
-  EmitInstruction(Out, MCInstBuilder(X86::JE_1).addExpr(DoneExpr));
-
-  EmitCallAsanReport(AccessSize, IsWrite, Ctx, Out, RegCtx);
-  EmitLabel(Out, DoneSym);
-}
-
-void X86AddressSanitizer32::InstrumentMOVSImpl(unsigned AccessSize,
-                                               MCContext &Ctx,
-                                               MCStreamer &Out) {
-  StoreFlags(Out);
-
-  // No need to test when ECX is equals to zero.
-  MCSymbol *DoneSym = Ctx.createTempSymbol();
-  const MCExpr *DoneExpr = MCSymbolRefExpr::create(DoneSym, Ctx);
-  EmitInstruction(
-      Out, MCInstBuilder(X86::TEST32rr).addReg(X86::ECX).addReg(X86::ECX));
-  EmitInstruction(Out, MCInstBuilder(X86::JE_1).addExpr(DoneExpr));
-
-  // Instrument first and last elements in src and dst range.
-  InstrumentMOVSBase(X86::EDI /* DstReg */, X86::ESI /* SrcReg */,
-                     X86::ECX /* CntReg */, AccessSize, Ctx, Out);
-
-  EmitLabel(Out, DoneSym);
-  RestoreFlags(Out);
-}
-
-class X86AddressSanitizer64 : public X86AddressSanitizer {
-public:
-  static const long kShadowOffset = 0x7fff8000;
-
-  X86AddressSanitizer64(const MCSubtargetInfo *&STI)
-      : X86AddressSanitizer(STI) {}
-
-  ~X86AddressSanitizer64() override = default;
-
-  unsigned GetFrameReg(const MCContext &Ctx, MCStreamer &Out) {
-    unsigned FrameReg = GetFrameRegGeneric(Ctx, Out);
-    if (FrameReg == X86::NoRegister)
-      return FrameReg;
-    return getX86SubSuperRegister(FrameReg, 64);
-  }
-
-  void SpillReg(MCStreamer &Out, unsigned Reg) {
-    EmitInstruction(Out, MCInstBuilder(X86::PUSH64r).addReg(Reg));
-    OrigSPOffset -= 8;
-  }
-
-  void RestoreReg(MCStreamer &Out, unsigned Reg) {
-    EmitInstruction(Out, MCInstBuilder(X86::POP64r).addReg(Reg));
-    OrigSPOffset += 8;
-  }
-
-  void StoreFlags(MCStreamer &Out) {
-    EmitInstruction(Out, MCInstBuilder(X86::PUSHF64));
-    OrigSPOffset -= 8;
-  }
-
-  void RestoreFlags(MCStreamer &Out) {
-    EmitInstruction(Out, MCInstBuilder(X86::POPF64));
-    OrigSPOffset += 8;
-  }
-
-  void InstrumentMemOperandPrologue(const RegisterContext &RegCtx,
-                                    MCContext &Ctx,
-                                    MCStreamer &Out) override {
-    unsigned LocalFrameReg = RegCtx.ChooseFrameReg(64);
-    assert(LocalFrameReg != X86::NoRegister);
-
-    const MCRegisterInfo *MRI = Ctx.getRegisterInfo();
-    unsigned FrameReg = GetFrameReg(Ctx, Out);
-    if (MRI && FrameReg != X86::NoRegister) {
-      SpillReg(Out, X86::RBP);
-      if (FrameReg == X86::RSP) {
-        Out.EmitCFIAdjustCfaOffset(8 /* byte size of the LocalFrameReg */);
-        Out.EmitCFIRelOffset(
-            MRI->getDwarfRegNum(LocalFrameReg, true /* IsEH */), 0);
-      }
-      EmitInstruction(
-          Out,
-          MCInstBuilder(X86::MOV64rr).addReg(LocalFrameReg).addReg(FrameReg));
-      Out.EmitCFIRememberState();
-      Out.EmitCFIDefCfaRegister(
-          MRI->getDwarfRegNum(LocalFrameReg, true /* IsEH */));
-    }
-
-    EmitAdjustRSP(Ctx, Out, -128);
-    SpillReg(Out, RegCtx.ShadowReg(64));
-    SpillReg(Out, RegCtx.AddressReg(64));
-    if (RegCtx.ScratchReg(64) != X86::NoRegister)
-      SpillReg(Out, RegCtx.ScratchReg(64));
-    StoreFlags(Out);
-  }
-
-  void InstrumentMemOperandEpilogue(const RegisterContext &RegCtx,
-                                    MCContext &Ctx,
-                                    MCStreamer &Out) override {
-    unsigned LocalFrameReg = RegCtx.ChooseFrameReg(64);
-    assert(LocalFrameReg != X86::NoRegister);
-
-    RestoreFlags(Out);
-    if (RegCtx.ScratchReg(64) != X86::NoRegister)
-      RestoreReg(Out, RegCtx.ScratchReg(64));
-    RestoreReg(Out, RegCtx.AddressReg(64));
-    RestoreReg(Out, RegCtx.ShadowReg(64));
-    EmitAdjustRSP(Ctx, Out, 128);
-
-    unsigned FrameReg = GetFrameReg(Ctx, Out);
-    if (Ctx.getRegisterInfo() && FrameReg != X86::NoRegister) {
-      RestoreReg(Out, LocalFrameReg);
-      Out.EmitCFIRestoreState();
-      if (FrameReg == X86::RSP)
-        Out.EmitCFIAdjustCfaOffset(-8 /* byte size of the LocalFrameReg */);
-    }
-  }
-
-  void InstrumentMemOperandSmall(X86Operand &Op, unsigned AccessSize,
-                                 bool IsWrite,
-                                 const RegisterContext &RegCtx,
-                                 MCContext &Ctx,
-                                 MCStreamer &Out) override;
-  void InstrumentMemOperandLarge(X86Operand &Op, unsigned AccessSize,
-                                 bool IsWrite,
-                                 const RegisterContext &RegCtx,
-                                 MCContext &Ctx,
-                                 MCStreamer &Out) override;
-  void InstrumentMOVSImpl(unsigned AccessSize, MCContext &Ctx,
-                          MCStreamer &Out) override;
-
-private:
-  void EmitAdjustRSP(MCContext &Ctx, MCStreamer &Out, long Offset) {
-    const MCExpr *Disp = MCConstantExpr::create(Offset, Ctx);
-    std::unique_ptr<X86Operand> Op(
-        X86Operand::CreateMem(getPointerWidth(), 0, Disp, X86::RSP, 0, 1,
-                              SMLoc(), SMLoc()));
-    EmitLEA(*Op, 64, X86::RSP, Out);
-    OrigSPOffset += Offset;
-  }
-
-  void EmitCallAsanReport(unsigned AccessSize, bool IsWrite, MCContext &Ctx,
-                          MCStreamer &Out, const RegisterContext &RegCtx) {
-    EmitInstruction(Out, MCInstBuilder(X86::CLD));
-    EmitInstruction(Out, MCInstBuilder(X86::MMX_EMMS));
-
-    EmitInstruction(Out, MCInstBuilder(X86::AND64ri8)
-                             .addReg(X86::RSP)
-                             .addReg(X86::RSP)
-                             .addImm(-16));
-
-    if (RegCtx.AddressReg(64) != X86::RDI) {
-      EmitInstruction(Out, MCInstBuilder(X86::MOV64rr).addReg(X86::RDI).addReg(
-                               RegCtx.AddressReg(64)));
-    }
-    MCSymbol *FnSym = Ctx.getOrCreateSymbol(Twine("__asan_report_") +
-                                            (IsWrite ? "store" : "load") +
-                                            Twine(AccessSize));
-    const MCSymbolRefExpr *FnExpr =
-        MCSymbolRefExpr::create(FnSym, MCSymbolRefExpr::VK_PLT, Ctx);
-    EmitInstruction(Out, MCInstBuilder(X86::CALL64pcrel32).addExpr(FnExpr));
-  }
-};
-
-} // end anonymous namespace
-
-void X86AddressSanitizer64::InstrumentMemOperandSmall(
-    X86Operand &Op, unsigned AccessSize, bool IsWrite,
-    const RegisterContext &RegCtx, MCContext &Ctx, MCStreamer &Out) {
-  unsigned AddressRegI64 = RegCtx.AddressReg(64);
-  unsigned AddressRegI32 = RegCtx.AddressReg(32);
-  unsigned ShadowRegI64 = RegCtx.ShadowReg(64);
-  unsigned ShadowRegI32 = RegCtx.ShadowReg(32);
-  unsigned ShadowRegI8 = RegCtx.ShadowReg(8);
-
-  assert(RegCtx.ScratchReg(32) != X86::NoRegister);
-  unsigned ScratchRegI32 = RegCtx.ScratchReg(32);
-
-  ComputeMemOperandAddress(Op, 64, AddressRegI64, Ctx, Out);
-
-  EmitInstruction(Out, MCInstBuilder(X86::MOV64rr).addReg(ShadowRegI64).addReg(
-                           AddressRegI64));
-  EmitInstruction(Out, MCInstBuilder(X86::SHR64ri)
-                           .addReg(ShadowRegI64)
-                           .addReg(ShadowRegI64)
-                           .addImm(3));
-  {
-    MCInst Inst;
-    Inst.setOpcode(X86::MOV8rm);
-    Inst.addOperand(MCOperand::createReg(ShadowRegI8));
-    const MCExpr *Disp = MCConstantExpr::create(kShadowOffset, Ctx);
-    std::unique_ptr<X86Operand> Op(
-        X86Operand::CreateMem(getPointerWidth(), 0, Disp, ShadowRegI64, 0, 1,
-                              SMLoc(), SMLoc()));
-    Op->addMemOperands(Inst, 5);
-    EmitInstruction(Out, Inst);
-  }
-
-  EmitInstruction(
-      Out, MCInstBuilder(X86::TEST8rr).addReg(ShadowRegI8).addReg(ShadowRegI8));
-  MCSymbol *DoneSym = Ctx.createTempSymbol();
-  const MCExpr *DoneExpr = MCSymbolRefExpr::create(DoneSym, Ctx);
-  EmitInstruction(Out, MCInstBuilder(X86::JE_1).addExpr(DoneExpr));
-
-  EmitInstruction(Out, MCInstBuilder(X86::MOV32rr).addReg(ScratchRegI32).addReg(
-                           AddressRegI32));
-  EmitInstruction(Out, MCInstBuilder(X86::AND32ri)
-                           .addReg(ScratchRegI32)
-                           .addReg(ScratchRegI32)
-                           .addImm(7));
-
-  switch (AccessSize) {
-  default: llvm_unreachable("Incorrect access size");
-  case 1:
-    break;
-  case 2: {
-    const MCExpr *Disp = MCConstantExpr::create(1, Ctx);
-    std::unique_ptr<X86Operand> Op(
-        X86Operand::CreateMem(getPointerWidth(), 0, Disp, ScratchRegI32, 0, 1,
-                              SMLoc(), SMLoc()));
-    EmitLEA(*Op, 32, ScratchRegI32, Out);
-    break;
-  }
-  case 4:
-    EmitInstruction(Out, MCInstBuilder(X86::ADD32ri8)
-                             .addReg(ScratchRegI32)
-                             .addReg(ScratchRegI32)
-                             .addImm(3));
-    break;
-  }
-
-  EmitInstruction(
-      Out,
-      MCInstBuilder(X86::MOVSX32rr8).addReg(ShadowRegI32).addReg(ShadowRegI8));
-  EmitInstruction(Out, MCInstBuilder(X86::CMP32rr).addReg(ScratchRegI32).addReg(
-                           ShadowRegI32));
-  EmitInstruction(Out, MCInstBuilder(X86::JL_1).addExpr(DoneExpr));
-
-  EmitCallAsanReport(AccessSize, IsWrite, Ctx, Out, RegCtx);
-  EmitLabel(Out, DoneSym);
-}
-
-void X86AddressSanitizer64::InstrumentMemOperandLarge(
-    X86Operand &Op, unsigned AccessSize, bool IsWrite,
-    const RegisterContext &RegCtx, MCContext &Ctx, MCStreamer &Out) {
-  unsigned AddressRegI64 = RegCtx.AddressReg(64);
-  unsigned ShadowRegI64 = RegCtx.ShadowReg(64);
-
-  ComputeMemOperandAddress(Op, 64, AddressRegI64, Ctx, Out);
-
-  EmitInstruction(Out, MCInstBuilder(X86::MOV64rr).addReg(ShadowRegI64).addReg(
-                           AddressRegI64));
-  EmitInstruction(Out, MCInstBuilder(X86::SHR64ri)
-                           .addReg(ShadowRegI64)
-                           .addReg(ShadowRegI64)
-                           .addImm(3));
-  {
-    MCInst Inst;
-    switch (AccessSize) {
-    default: llvm_unreachable("Incorrect access size");
-    case 8:
-      Inst.setOpcode(X86::CMP8mi);
-      break;
-    case 16:
-      Inst.setOpcode(X86::CMP16mi);
-      break;
-    }
-    const MCExpr *Disp = MCConstantExpr::create(kShadowOffset, Ctx);
-    std::unique_ptr<X86Operand> Op(
-        X86Operand::CreateMem(getPointerWidth(), 0, Disp, ShadowRegI64, 0, 1,
-                              SMLoc(), SMLoc()));
-    Op->addMemOperands(Inst, 5);
-    Inst.addOperand(MCOperand::createImm(0));
-    EmitInstruction(Out, Inst);
-  }
-
-  MCSymbol *DoneSym = Ctx.createTempSymbol();
-  const MCExpr *DoneExpr = MCSymbolRefExpr::create(DoneSym, Ctx);
-  EmitInstruction(Out, MCInstBuilder(X86::JE_1).addExpr(DoneExpr));
-
-  EmitCallAsanReport(AccessSize, IsWrite, Ctx, Out, RegCtx);
-  EmitLabel(Out, DoneSym);
-}
-
-void X86AddressSanitizer64::InstrumentMOVSImpl(unsigned AccessSize,
-                                               MCContext &Ctx,
-                                               MCStreamer &Out) {
-  StoreFlags(Out);
-
-  // No need to test when RCX is equals to zero.
-  MCSymbol *DoneSym = Ctx.createTempSymbol();
-  const MCExpr *DoneExpr = MCSymbolRefExpr::create(DoneSym, Ctx);
-  EmitInstruction(
-      Out, MCInstBuilder(X86::TEST64rr).addReg(X86::RCX).addReg(X86::RCX));
-  EmitInstruction(Out, MCInstBuilder(X86::JE_1).addExpr(DoneExpr));
-
-  // Instrument first and last elements in src and dst range.
-  InstrumentMOVSBase(X86::RDI /* DstReg */, X86::RSI /* SrcReg */,
-                     X86::RCX /* CntReg */, AccessSize, Ctx, Out);
-
-  EmitLabel(Out, DoneSym);
-  RestoreFlags(Out);
-}
-
-X86AsmInstrumentation::X86AsmInstrumentation(const MCSubtargetInfo *&STI)
-    : STI(STI) {}
-
-X86AsmInstrumentation::~X86AsmInstrumentation() = default;
-
-void X86AsmInstrumentation::InstrumentAndEmitInstruction(
-    const MCInst &Inst, OperandVector &Operands, MCContext &Ctx,
-    const MCInstrInfo &MII, MCStreamer &Out) {
-  EmitInstruction(Out, Inst);
-}
-
-void X86AsmInstrumentation::EmitInstruction(MCStreamer &Out,
-                                            const MCInst &Inst) {
-  Out.EmitInstruction(Inst, *STI);
-}
-
-unsigned X86AsmInstrumentation::GetFrameRegGeneric(const MCContext &Ctx,
-                                                   MCStreamer &Out) {
-  if (!Out.getNumFrameInfos()) // No active dwarf frame
-    return X86::NoRegister;
-  const MCDwarfFrameInfo &Frame = Out.getDwarfFrameInfos().back();
-  if (Frame.End) // Active dwarf frame is closed
-    return X86::NoRegister;
-  const MCRegisterInfo *MRI = Ctx.getRegisterInfo();
-  if (!MRI) // No register info
-    return X86::NoRegister;
-
-  if (InitialFrameReg) {
-    // FrameReg is set explicitly, we're instrumenting a MachineFunction.
-    return InitialFrameReg;
-  }
-
-  return MRI->getLLVMRegNum(Frame.CurrentCfaRegister, true /* IsEH */);
-}
-
-X86AsmInstrumentation *
-llvm::CreateX86AsmInstrumentation(const MCTargetOptions &MCOptions,
-                                  const MCContext &Ctx,
-                                  const MCSubtargetInfo *&STI) {
-  Triple T(STI->getTargetTriple());
-  const bool hasCompilerRTSupport = T.isOSLinux();
-  if (ClAsanInstrumentAssembly && hasCompilerRTSupport &&
-      MCOptions.SanitizeAddress) {
-    if (STI->getFeatureBits()[X86::Mode32Bit] != 0)
-      return new X86AddressSanitizer32(STI);
-    if (STI->getFeatureBits()[X86::Mode64Bit] != 0)
-      return new X86AddressSanitizer64(STI);
-  }
-  return new X86AsmInstrumentation(STI);
-}

llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp

 //===-- X86AsmParser.cpp - Parse X86 assembly to MCInst instructions ------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
 #include "InstPrinter/X86IntelInstPrinter.h"
 #include "MCTargetDesc/X86BaseInfo.h"
 #include "MCTargetDesc/X86MCExpr.h"
 #include "MCTargetDesc/X86TargetStreamer.h"
-#include "X86AsmInstrumentation.h"
 #include "X86AsmParserCommon.h"
 #include "X86Operand.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/MC/MCContext.h"
static const char OpPrecedence[] = {
   8, // IC_RPAREN
   9, // IC_LPAREN
   0, // IC_IMM
   0  // IC_REGISTER
 };
 
 class X86AsmParser : public MCTargetAsmParser {
   ParseInstructionInfo *InstInfo;
-  std::unique_ptr<X86AsmInstrumentation> Instrumentation;
   bool Code16GCC;
 
 private:
   SMLoc consumeToken() {
     MCAsmParser &Parser = getParser();
     SMLoc Result = Parser.getTok().getLoc();
     Parser.Lex();
     return Result;
X86AsmParser(const MCSubtargetInfo &sti, MCAsmParser &Parser,
                const MCInstrInfo &mii, const MCTargetOptions &Options)
       : MCTargetAsmParser(Options, sti, mii),  InstInfo(nullptr),
         Code16GCC(false) {
 
     Parser.addAliasForDirective(".word", ".2byte");
 
     // Initialize the set of available features.
     setAvailableFeatures(ComputeAvailableFeatures(getSTI().getFeatureBits()));
-    Instrumentation.reset(
-        CreateX86AsmInstrumentation(Options, Parser.getContext(), STI));
   }
 
   bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc) override;
 
-  void SetFrameRegister(unsigned RegNo) override;
-
   bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) override;
 
   bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
                         SMLoc NameLoc, OperandVector &Operands) override;
 
   bool ParseDirective(AsmToken DirectiveID) override;
 };
 } // end anonymous namespace
if (RegNo == 0) {
     return Error(StartLoc, "invalid register name",
                  SMRange(StartLoc, EndLoc));
   }
 
   Parser.Lex(); // Eat identifier token.
   return false;
 }
 
-void X86AsmParser::SetFrameRegister(unsigned RegNo) {
-  Instrumentation->SetInitialFrameRegister(RegNo);
-}
-
 std::unique_ptr<X86Operand> X86AsmParser::DefaultMemSIOperand(SMLoc Loc) {
   bool Parse32 = is32BitMode() || Code16GCC;
   unsigned Basereg = is64BitMode() ? X86::RSI : (Parse32 ? X86::ESI : X86::SI);
   const MCExpr *Disp = MCConstantExpr::create(0, getContext());
   return X86Operand::CreateMem(getPointerWidth(), /*SegReg=*/0, Disp,
                                /*BaseReg=*/Basereg, /*IndexReg=*/0, /*Scale=*/1,
                                Loc, Loc, 0);
 }
bool X86AsmParser::validateInstruction(MCInst &Inst, const OperandVector &Ops) {
 
   return false;
 }
 
 static const char *getSubtargetFeatureName(uint64_t Val);
 
 void X86AsmParser::EmitInstruction(MCInst &Inst, OperandVector &Operands,
                                    MCStreamer &Out) {
-  Instrumentation->InstrumentAndEmitInstruction(
-      Inst, Operands, getContext(), MII, Out);
+  Out.EmitInstruction(Inst, getSTI());
 }
 
 bool X86AsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
                                            OperandVector &Operands,
                                            MCStreamer &Out, uint64_t &ErrorInfo,
                                            bool MatchingInlineAsm) {
   if (isParsingIntelSyntax())
     return MatchAndEmitIntelInstruction(IDLoc, Opcode, Operands, Out, ErrorInfo,

llvm/test/Instrumentation/AddressSanitizer/X86/asm_attr.ll

-; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 -mattr=+sse2 -asm-instrumentation=address -asan-instrument-assembly | FileCheck %s
-
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64-unknown-linux-gnu"
-
-; CHECK-LABEL: mov_no_attr
-; CHECK-NOT: callq __asan_report_load8@PLT
-; CHECK-NOT: callq __asan_report_store8@PLT
-define void @mov_no_attr(i64* %dst, i64* %src) {
-  tail call void asm sideeffect "movq ($1), %rax  \0A\09movq %rax, ($0)  \0A\09", "r,r,~{memory},~{rax},~{dirflag},~{fpsr},~{flags}"(i64* %dst, i64* %src)
-  ret void
-}
-
-; CHECK-LABEL: mov_sanitize
-; CHECK: callq __asan_report_load8@PLT
-; CHECK: callq __asan_report_store8@PLT
-define void @mov_sanitize(i64* %dst, i64* %src) sanitize_address {
-  tail call void asm sideeffect "movq ($1), %rax  \0A\09movq %rax, ($0)  \0A\09", "r,r,~{memory},~{rax},~{dirflag},~{fpsr},~{flags}"(i64* %dst, i64* %src)
-  ret void
-}

llvm/test/Instrumentation/AddressSanitizer/X86/asm_cfi.ll

-; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 -mattr=+sse2 -asm-instrumentation=address -asan-instrument-assembly | FileCheck %s
-
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64-unknown-linux-gnu"
-
-; CHECK-LABEL: mov8b_rbp
-; CHECK: pushq %rbp
-; CHECK-NOT: .cfi_adjust_cfa_offset 8
-; CHECK: movq %rbp, %rbp
-; CHECK: .cfi_remember_state
-; CHECK: .cfi_def_cfa_register %rbp
-; CHECK: leaq -128(%rsp)
-; CHECK: callq __asan_report_load8@PLT
-; CHECK: leaq 128(%rsp)
-; CHECK: popq %rbp
-; CHECK: .cfi_restore_state
-; CHECK-NOT: .cfi_adjust_cfa_offset -8
-; CHECK: retq
-define void @mov8b_rbp(i64* %dst, i64* %src) #0 {
-entry:
-  tail call void asm sideeffect "movq ($0), %rax \0A\09movq %rax, ($1) \0A\09", "r,r,~{rax},~{memory},~{dirflag},~{fpsr},~{flags}"(i64* %src, i64* %dst)
-  ret void
-}
-
-; CHECK-LABEL: mov8b_rsp
-; CHECK: pushq %rbp
-; CHECK: .cfi_adjust_cfa_offset 8
-; CHECK: movq %rsp, %rbp
-; CHECK: .cfi_remember_state
-; CHECK: .cfi_def_cfa_register %rbp
-; CHECK: leaq -128(%rsp)
-; CHECK: callq __asan_report_load8@PLT
-; CHECK: leaq 128(%rsp)
-; CHECK: popq %rbp
-; CHECK: .cfi_restore_state
-; CHECK: .cfi_adjust_cfa_offset -8
-; CHECK: retq
-define void @mov8b_rsp(i64* %dst, i64* %src) #1 {
-entry:
-  tail call void asm sideeffect "movq ($0), %rax \0A\09movq %rax, ($1) \0A\09", "r,r,~{rax},~{memory},~{dirflag},~{fpsr},~{flags}"(i64* %src, i64* %dst)
-  ret void
-}
-
-; CHECK-LABEL: mov8b_rsp_no_cfi
-; CHECK-NOT: .cfi{{[a-z_]+}}
-define void @mov8b_rsp_no_cfi(i64* %dst, i64* %src) #2 {
-entry:
-  tail call void asm sideeffect "movq ($0), %rax \0A\09movq %rax, ($1) \0A\09", "r,r,~{rax},~{memory},~{dirflag},~{fpsr},~{flags}"(i64* %src, i64* %dst)
-  ret void
-}
-
-attributes #0 = { nounwind sanitize_address uwtable "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" }
-attributes #1 = { nounwind sanitize_address uwtable "no-frame-pointer-elim"="false" }
-attributes #2 = { nounwind sanitize_address "no-frame-pointer-elim"="false" }

llvm/test/Instrumentation/AddressSanitizer/X86/asm_cfi.s

-# The test verifies that correct DWARF directives are emitted when
-# assembly files are instrumented.
-
-# RUN: llvm-mc %s -triple=i386-unknown-linux-gnu -asm-instrumentation=address -asan-instrument-assembly | FileCheck %s
-
-# CHECK-LABEL: load4b_cfa_rbp
-# CHECK: pushl %ebx
-# CHECK-NOT: .cfi_adjust_cfa_offset 8
-# CHECK: movl %ebp, %ebx
-# CHECK: .cfi_remember_state
-# CHECK: .cfi_def_cfa_register %ebx
-# CHECK: popl %ebx
-# CHECK: .cfi_restore_state
-# CHECK-NOT: .cfi_adjust_cfa_offset -8
-# CHECK: retl
-
-  .text
-  .globl  load4b_cfa_rbp
-  .type load4b_cfa_rbp,@function
-swap_cfa_rbp:                                   # @swap_cfa_rbp
-  .cfi_startproc
-  pushl %ebp
-  .cfi_def_cfa_offset 8
-  .cfi_offset %ebp, -8
-  movl  %esp, %ebp
-  .cfi_def_cfa_register %ebp
-  movl  8(%ebp), %eax
-  popl  %ebp
-  retl
-  .cfi_endproc
-
-# CHECK-LABEL: load4b_cfa_rsp
-# CHECK: pushl %ebx
-# CHECK: .cfi_adjust_cfa_offset 4
-# CHECK: movl %esp, %ebx
-# CHECK: .cfi_remember_state
-# CHECK: .cfi_def_cfa_register %ebx
-# CHECK: popl %ebx
-# CHECK: .cfi_restore_state
-# CHECK: retl
-
-  .globl  load4b_cfa_rsp
-  .type load4b_cfa_rsp,@function
-swap_cfa_rsp:                                   # @swap_cfa_rsp
-  .cfi_startproc
-  pushl %ebp
-  .cfi_offset %ebp, 0
-  movl  %esp, %ebp
-  movl  8(%ebp), %eax
-  popl  %ebp
-  retl
-  .cfi_endproc

llvm/test/Instrumentation/AddressSanitizer/X86/asm_mov.ll

-; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 -mattr=+sse2 -asm-instrumentation=address -asan-instrument-assembly | FileCheck %s
-
-target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
-target triple = "x86_64-unknown-linux-gnu"
-
-; CHECK-LABEL: mov1b
-; CHECK: leaq -128(%rsp), %rsp
-; CHECK-NEXT: pushq %rax
-; CHECK-NEXT: pushq %rdi
-; CHECK-NEXT: pushq %rcx
-; CHECK-NEXT: pushfq
-; CHECK-NEXT: leaq {{.*}}, %rdi
-; CHECK-NEXT: movq %rdi, %rax
-; CHECK-NEXT: shrq $3, %rax
-; CHECK-NEXT: movb 2147450880(%rax), %al
-; CHECK-NEXT: testb %al, %al
-; CHECK-NEXT: je [[A:.*]]
-; CHECK-NEXT: movl %edi, %ecx
-; CHECK-NEXT: andl $7, %ecx
-; CHECK-NEXT: movsbl %al, %eax
-; CHECK-NEXT: cmpl %eax, %ecx
-; CHECK-NEXT: jl {{.*}}
-; CHECK-NEXT: cld
-; CHECK-NEXT: emms
-; CHECK-NEXT: andq $-16, %rsp
-; CHECK-NEXT: callq __asan_report_load1@PLT
-; CHECK-NEXT: [[A]]:
-; CHECK-NEXT: popfq
-; CHECK-NEXT: popq %rcx
-; CHECK-NEXT: popq %rdi
-; CHECK-NEXT: popq %rax
-; CHECK-NEXT: leaq 128(%rsp), %rsp
-
-; CHECK: leaq -128(%rsp), %rsp
-; CHECK: callq __asan_report_store1@PLT
-; CHECK: leaq 128(%rsp), %rsp
-
-; CHECK: movb {{.*}}, {{.*}}
-define void @mov1b(i8* %dst, i8* %src) #0 {
-entry:
-  tail call void asm sideeffect "movb ($1), %al  \0A\09movb %al, ($0)  \0A\09", "r,r,~{memory},~{rax},~{dirflag},~{fpsr},~{flags}"(i8* %dst, i8* %src) #1, !srcloc !0
-  ret void
-}
-
-; CHECK-LABEL: mov2b
-; CHECK: leaq -128(%rsp), %rsp
-; CHECK: leal 1(%ecx), %ecx
-; CHECK: callq __asan_report_load2@PLT
-; CHECK: leaq 128(%rsp), %rsp
-
-; CHECK: leaq -128(%rsp), %rsp
-; CHECK: leal 1(%ecx), %ecx
-; CHECK: callq __asan_report_store2@PLT
-; CHECK: leaq 128(%rsp), %rsp
-
-; CHECK: movw {{.*}}, {{.*}}
-define void @mov2b(i16* %dst, i16* %src) #0 {
-entry:
-  tail call void asm sideeffect "movw ($1), %ax  \0A\09movw %ax, ($0)  \0A\09", "r,r,~{memory},~{rax},~{dirflag},~{fpsr},~{flags}"(i16* %dst, i16* %src) #1, !srcloc !1
-  ret void
-}
-
-; CHECK-LABEL: mov4b
-; CHECK: leaq -128(%rsp), %rsp
-; CHECK: addl $3, %ecx
-; CHECK: callq __asan_report_load4@PLT
-; CHECK: leaq 128(%rsp), %rsp
-
-; CHECK: leaq -128(%rsp), %rsp
-; CHECK: addl $3, %ecx
-; CHECK: callq __asan_report_store4@PLT
-; CHECK: leaq 128(%rsp), %rsp
-
-; CHECK: movl {{.*}}, {{.*}}
-define void @mov4b(i32* %dst, i32* %src) #0 {
-entry:
-  tail call void asm sideeffect "movl ($1), %eax  \0A\09movl %eax, ($0)  \0A\09", "r,r,~{memory},~{rax},~{dirflag},~{fpsr},~{flags}"(i32* %dst, i32* %src) #1, !srcloc !2
-  ret void
-}
-
-; CHECK-LABEL: mov8b
-; CHECK: leaq -128(%rsp), %rsp
-; CHECK-NEXT: pushq %rax
-; CHECK-NEXT: pushq %rdi
-; CHECK-NEXT: pushfq
-; CHECK-NEXT: leaq {{.*}}, %rdi
-; CHECK-NEXT: movq %rdi, %rax
-; CHECK-NEXT: shrq $3, %rax
-; CHECK-NEXT: cmpb $0, 2147450880(%rax)
-; CHECK-NEXT: je [[A:.*]]
-; CHECK-NEXT: cld
-; CHECK-NEXT: emms
-; CHECK-NEXT: andq $-16, %rsp
-; CHECK-NEXT: callq __asan_report_load8@PLT
-; CHECK-NEXT: [[A]]:
-; CHECK-NEXT: popfq
-; CHECK-NEXT: popq %rdi
-; CHECK-NEXT: popq %rax
-; CHECK-NEXT: leaq 128(%rsp), %rsp
-
-; CHECK: leaq -128(%rsp), %rsp
-; CHECK-NEXT: pushq %rax
-; CHECK-NEXT: pushq %rdi
-; CHECK-NEXT: pushfq
-; CHECK-NEXT: leaq {{.*}}, %rdi
-; CHECK-NEXT: movq %rdi, %rax
-; CHECK-NEXT: shrq $3, %rax
-; CHECK-NEXT: cmpb $0, 2147450880(%rax)
-; CHECK-NEXT: je [[A:.*]]
-; CHECK-NEXT: cld
-; CHECK-NEXT: emms
-; CHECK-NEXT: andq $-16, %rsp
-; CHECK-NEXT: callq __asan_report_store8@PLT
-; CHECK-NEXT: [[A]]:
-; CHECK-NEXT: popfq
-; CHECK-NEXT: popq %rdi
-; CHECK-NEXT: popq %rax
-; CHECK-NEXT: leaq 128(%rsp), %rsp
-
-; CHECK: movq {{.*}}, {{.*}}
-define void @mov8b(i64* %dst, i64* %src) #0 {
-entry:
-  tail call void asm sideeffect "movq ($1), %rax  \0A\09movq %rax, ($0)  \0A\09", "r,r,~{memory},~{rax},~{dirflag},~{fpsr},~{flags}"(i64* %dst, i64* %src) #1, !srcloc !3
-  ret void
-}
-
-; CHECK-LABEL: mov16b
-; CHECK: leaq -128(%rsp), %rsp
-; CHECK: cmpw $0, 2147450880(%rax)
-; CHECK: callq __asan_report_load16@PLT
-; CHECK: leaq 128(%rsp), %rsp
-
-; CHECK: leaq -128(%rsp), %rsp
-; CHECK: cmpw $0, 2147450880(%rax)
-; CHECK: callq __asan_report_store16@PLT
-; CHECK: leaq 128(%rsp), %rsp
-
-; CHECK: movaps {{.*}}, {{.*}}
-define void @mov16b(<2 x i64>* %dst, <2 x i64>* %src) #0 {
-entry:
-  tail call void asm sideeffect "movaps ($1), %xmm0  \0A\09movaps %xmm0, ($0)  \0A\09", "r,r,~{memory},~{xmm0},~{dirflag},~{fpsr},~{flags}"(<2 x i64>* %dst, <2 x i64>* %src) #1, !srcloc !4
-  ret void
-}
-
-attributes #0 = { nounwind uwtable sanitize_address "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-frame-pointer-elim-non-leaf"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
-attributes #1 = { nounwind }
-
-!0 = !{i32 98, i32 122, i32 160}
-!1 = !{i32 305, i32 329, i32 367}
-!2 = !{i32 512, i32 537, i32 576}
-!3 = !{i32 721, i32 746, i32 785}
-!4 = !{i32 929, i32 957, i32 999}

llvm/test/Instrumentation/AddressSanitizer/X86/asm_mov.s

-# RUN: llvm-mc %s -triple=x86_64-unknown-linux-gnu -mcpu=corei7 -mattr=+sse2 -asm-instrumentation=address -asan-instrument-assembly | FileCheck %s
-
-  .text
-  .globl  mov1b
-  .align  16, 0x90
-  .type mov1b,@function
-# CHECK-LABEL: mov1b:
-#
-# CHECK: leaq -128(%rsp), %rsp
-# CHECK: callq __asan_report_load1@PLT
-# CHECK: leaq 128(%rsp), %rsp
-#
-# CHECK: movb (%rsi), %al
-#
-# CHECK: leaq -128(%rsp), %rsp
-# CHECK: callq __asan_report_store1@PLT
-# CHECK: leaq 128(%rsp), %rsp
-#
-# CHECK: movb %al, (%rdi)
-mov1b:                                  # @mov1b
-  .cfi_startproc
-# %bb.0:
-  #APP
-  movb  (%rsi), %al
-  movb  %al, (%rdi)
-
-  #NO_APP
-  retq
-.Ltmp0:
-  .size mov1b, .Ltmp0-mov1b
-  .cfi_endproc
-
-  .globl  mov16b
-  .align  16, 0x90
-  .type mov16b,@function
-# CHECK-LABEL: mov16b:
-#
-# CHECK: leaq -128(%rsp), %rsp
-# CHECK: callq __asan_report_load16@PLT
-# CHECK: leaq 128(%rsp), %rsp
-#
-# CHECK: movaps (%rsi), %xmm0
-#
-# CHECK: leaq -128(%rsp), %rsp
-# CHECK: callq __asan_report_store16@PLT
-# CHECK: leaq 128(%rsp), %rsp
-#
-# CHECK: movaps %xmm0, (%rdi)
-mov16b:                                 # @mov16b
-  .cfi_startproc
-# %bb.0:
-  #APP
-  movaps  (%rsi), %xmm0
-  movaps  %xmm0, (%rdi)
-
-  #NO_APP
-  retq
-.Ltmp1:
-  .size mov16b, .Ltmp1-mov16b
-  .cfi_endproc
-
-
-  .ident  "clang version 3.5 "
-  .section  ".note.GNU-stack","",@progbits

llvm/test/Instrumentation/AddressSanitizer/X86/asm_rep_movs.ll

-; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 -mattr=+sse2 -asm-instrumentation=address -asan-instrument-assembly | FileCheck %s
-
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64-unknown-linux-gnu"
-
-; CHECK-LABEL: rep_movs_1b
-; CHECK: pushfq
-; CHECK-NEXT: testq %rcx, %rcx
-; CHECK-NEXT: je [[B:.*]]
-
-; CHECK: leaq -128(%rsp), %rsp
-; CHECK-NEXT: pushq %rax
-; CHECK-NEXT: pushq %rdx
-; CHECK-NEXT: pushq %rbx
-; CHECK-NEXT: pushfq
-
-; CHECK: leaq (%rsi), %rdx
-; CHECK: movq %rdx, %rdi
-; CHECK-NEXT: callq __asan_report_load1@PLT
-
-; CHECK: leaq -1(%rsi,%rcx), %rdx
-; CHECK: movq %rdx, %rdi
-; CHECK-NEXT: callq __asan_report_load1@PLT
-
-; CHECK: leaq (%rdi), %rdx
-; CHECK: movq %rdx, %rdi
-; CHECK-NEXT: callq __asan_report_store1@PLT
-
-; CHECK: leaq -1(%rdi,%rcx), %rdx
-; CHECK: movq %rdx, %rdi
-; CHECK-NEXT: callq __asan_report_store1@PLT
-
-; CHECK: popfq
-; CHECK-NEXT: popq %rbx
-; CHECK-NEXT: popq %rdx
-; CHECK-NEXT: popq %rax
-; CHECK-NEXT: leaq 128(%rsp), %rsp
-
-; CHECK: [[B]]:
-; CHECK-NEXT: popfq
-
-; CHECK: rep movsb (%rsi), %es:(%rdi)
-
-; Function Attrs: nounwind sanitize_address uwtable
-define void @rep_movs_1b(i8* %dst, i8* %src, i64 %n) #0 {
-entry:
-  tail call void asm sideeffect "rep movsb \0A\09", "{si},{di},{cx},~{memory},~{dirflag},~{fpsr},~{flags}"(i8* %src, i8* %dst, i64 %n) #1
-  ret void
-}
-
-; CHECK-LABEL: rep_movs_8b
-; CHECK: pushfq
-; CHECK-NEXT: testq %rcx, %rcx
-; CHECK-NEXT: je [[Q:.*]]
-
-; CHECK: leaq (%rsi), %rdx
-; CHECK: movq %rdx, %rdi
-; CHECK-NEXT: callq __asan_report_load8@PLT
-
-; CHECK: leaq -1(%rsi,%rcx,8), %rdx
-; CHECK: movq %rdx, %rdi
-; CHECK-NEXT: callq __asan_report_load8@PLT
-
-; CHECK: leaq (%rdi), %rdx
-; CHECK: movq %rdx, %rdi
-; CHECK-NEXT: callq __asan_report_store8@PLT
-
-; CHECK: leaq -1(%rdi,%rcx,8), %rdx
-; CHECK: movq %rdx, %rdi
-; CHECK-NEXT: callq __asan_report_store8@PLT
-
-; CHECK: [[Q]]:
-; CHECK-NEXT: popfq
-
-; CHECK: rep movsq (%rsi), %es:(%rdi)
-
-; Function Attrs: nounwind sanitize_address uwtable
-define void @rep_movs_8b(i64* %dst, i64* %src, i64 %n) #0 {
-entry:
-  tail call void asm sideeffect "rep movsq \0A\09", "{si},{di},{cx},~{memory},~{dirflag},~{fpsr},~{flags}"(i64* %src, i64* %dst, i64 %n) #1
-  ret void
-}
-
-attributes #0 = { nounwind sanitize_address uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
-attributes #1 = { nounwind }

llvm/test/Instrumentation/AddressSanitizer/X86/asm_rsp_mem_op.s

-# The test verifies that memory references through %rsp are correctly
-# adjusted after instrumentation.
-
-# RUN: llvm-mc %s -triple=x86_64-unknown-linux-gnu -asm-instrumentation=address -asan-instrument-assembly | FileCheck %s
-
-# CHECK-LABEL: rsp_access
-# CHECK: leaq -128(%rsp), %rsp
-# CHECK: pushq %rax
-# CHECK: pushq %rdi
-# CHECK: pushfq
-# CHECK: leaq 160(%rsp), %rdi
-# CHECK: callq __asan_report_load8@PLT
-# CHECK: popfq
-# CHECK: popq %rdi
-# CHECK: popq %rax
-# CHECK: leaq 128(%rsp), %rsp
-# CHECK: movq 8(%rsp), %rax
-# CHECK: retq
-
-  .text
-  .globl rsp_access
-  .type rsp_access,@function
-rsp_access:
-  movq 8(%rsp), %rax
-  retq
-
-# CHECK-LABEL: rsp_32bit_access
-# CHECK: leaq -128(%rsp), %rsp
-# CHECK: pushq %rax
-# CHECK: pushq %rdi
-# CHECK: pushfq
-# CHECK: leaq 2147483647(%rsp), %rdi
-# CHECK: leaq 145(%rdi), %rdi
-# CHECK: callq __asan_report_load8@PLT
-# CHECK: popfq
-# CHECK: popq %rdi
-# CHECK: popq %rax
-# CHECK: leaq 128(%rsp), %rsp
-# CHECK: movq 2147483640(%rsp), %rax
-# CHECK: retq
-  .globl rsp_32bit_access
-  .type rsp_32bit_access,@function
-rsp_32bit_access:
-  movq 2147483640(%rsp), %rax
-  retq

llvm/test/Instrumentation/AddressSanitizer/X86/asm_swap_intel.s

-# RUN: llvm-mc %s -x86-asm-syntax=intel -triple=x86_64-unknown-linux-gnu -asm-instrumentation=address -asan-instrument-assembly | FileCheck %s
-
-  .text
-  .globl  swap
-  .align  16, 0x90
-  .type swap,@function
-# CHECK-LABEL: swap:
-#
-# CHECK: leaq -128(%rsp), %rsp
-# CHECK: callq __asan_report_load8@PLT
-# CHECK: leaq 128(%rsp), %rsp
-#
-# CHECK: movq (%rcx), %rax
-#
-# CHECK: leaq -128(%rsp), %rsp
-# CHECK: callq __asan_report_load8@PLT
-# CHECK: leaq 128(%rsp), %rsp
-#
-# CHECK: movq (%rdx), %rbx
-#
-# CHECK: leaq -128(%rsp), %rsp
-# CHECK: callq __asan_report_store8@PLT
-# CHECK: leaq 128(%rsp), %rsp
-#
-# CHECK: movq %rbx, (%rcx)
-#
-# CHECK: leaq -128(%rsp), %rsp
-# CHECK: callq __asan_report_store8@PLT
-# CHECK: leaq 128(%rsp), %rsp
-#
-# CHECK: movq %rax, (%rdx)
-swap:                                   # @swap
-  .cfi_startproc
-# %bb.0:
-  push  rbx
-.Ltmp0:
-  .cfi_def_cfa_offset 16
-.Ltmp1:
-  .cfi_offset rbx, -16
-  mov rcx, rdi
-  mov rdx, rsi
-  #APP
-
-
-  mov rax, qword ptr [rcx]
-  mov rbx, qword ptr [rdx]
-  mov qword ptr [rcx], rbx
-  mov qword ptr [rdx], rax
-
-  #NO_APP
-  pop rbx
-  ret
-.Ltmp2:
-  .size swap, .Ltmp2-swap
-  .cfi_endproc
-
-
-  .ident  "clang version 3.5.0 "
-  .section  ".note.GNU-stack","",@progbits

llvm/utils/gn/secondary/llvm/lib/Target/X86/AsmParser/BUILD.gn

deps = [
     "//llvm/lib/MC/MCParser",
     "//llvm/lib/Support",
     "//llvm/lib/Target/X86/InstPrinter",
     "//llvm/lib/Target/X86/MCTargetDesc",
     "//llvm/lib/Target/X86/TargetInfo",
   ]
   include_dirs = [ ".." ]
   sources = [
-    "X86AsmInstrumentation.cpp",
     "X86AsmParser.cpp",
   ]
 }