MCInstrInfo is exposed to asm instrumentation.

[ygorshenin]

Summary

MCInstrInfo is exposed to asm instrumentation.

[eugenis]

LGTM

lib/Target/X86/AsmParser/X86AsmParser.cpp

2261

wrong formatting;
I'll fix locally before commit.

[eugenis]

r207115.

lib/Target/X86/AsmParser/X86AsmInstrumentation.h

 #define X86_ASM_INSTRUMENTATION_H
 
 #include "llvm/ADT/SmallVector.h"
 
 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();
 
   // Instruments Inst. Should be called just before the original
   // instruction is sent to Out.
   virtual void InstrumentInstruction(
       const MCInst &Inst, SmallVectorImpl<MCParsedAsmOperand *> &Operands,
-      MCContext &Ctx, MCStreamer &Out);
+      MCContext &Ctx,
+      const MCInstrInfo &MII,
+      MCStreamer &Out);
 
 protected:
   friend X86AsmInstrumentation *
   CreateX86AsmInstrumentation(const MCTargetOptions &MCOptions,
                               const MCContext &Ctx, const MCSubtargetInfo &STI);
 
   X86AsmInstrumentation();
 };
 
 } // End llvm namespace
 
 #endif // X86_ASM_INSTRUMENTATION_H

lib/Target/X86/AsmParser/X86AsmInstrumentation.cpp

 #include "MCTargetDesc/X86BaseInfo.h"
 #include "X86AsmInstrumentation.h"
 #include "X86Operand.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/IR/Function.h"
 #include "llvm/MC/MCContext.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/MCStreamer.h"
 #include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/MC/MCTargetOptions.h"
 
 namespace llvm {
 namespace {
 

 class X86AddressSanitizer : public X86AsmInstrumentation {
 public:
   X86AddressSanitizer(const MCSubtargetInfo &STI) : STI(STI) {}
   virtual ~X86AddressSanitizer() {}
 
   // X86AsmInstrumentation implementation:
   virtual void InstrumentInstruction(
       const MCInst &Inst, SmallVectorImpl<MCParsedAsmOperand *> &Operands,
-      MCContext &Ctx, MCStreamer &Out) override {
-    InstrumentMOV(Inst, Operands, Ctx, Out);
+      MCContext &Ctx, const MCInstrInfo &MII, MCStreamer &Out) override {
+    InstrumentMOV(Inst, Operands, Ctx, MII, Out);
   }
 
   // Should be implemented differently in x86_32 and x86_64 subclasses.
   virtual void InstrumentMemOperandImpl(X86Operand *Op, unsigned AccessSize,
                                         bool IsWrite, MCContext &Ctx,
                                         MCStreamer &Out) = 0;
 
   void InstrumentMemOperand(MCParsedAsmOperand *Op, unsigned AccessSize,
                             bool IsWrite, MCContext &Ctx, MCStreamer &Out);
   void InstrumentMOV(const MCInst &Inst,
                      SmallVectorImpl<MCParsedAsmOperand *> &Operands,
-                     MCContext &Ctx, MCStreamer &Out);
+                     MCContext &Ctx, const MCInstrInfo &MII, MCStreamer &Out);
   void EmitInstruction(MCStreamer &Out, const MCInst &Inst) {
     Out.EmitInstruction(Inst, STI);
   }
 
 protected:
   const MCSubtargetInfo &STI;
 };
 
void X86AddressSanitizer::InstrumentMemOperand(
   if (IsStackReg(MemOp->getMemBaseReg()) || IsStackReg(MemOp->getMemIndexReg()))
     return;
 
   InstrumentMemOperandImpl(MemOp, AccessSize, IsWrite, Ctx, Out);
 }
 
 void X86AddressSanitizer::InstrumentMOV(
     const MCInst &Inst, SmallVectorImpl<MCParsedAsmOperand *> &Operands,
-    MCContext &Ctx, MCStreamer &Out) {
+    MCContext &Ctx, const MCInstrInfo &MII, MCStreamer &Out) {
   // Access size in bytes.
   unsigned AccessSize = 0;
 
-  // FIXME: use MCInstrDesc to get proper value of IsWrite.
-  bool IsWrite = false;
   switch (Inst.getOpcode()) {
   case X86::MOV8mi:
   case X86::MOV8mr:
-    AccessSize = 1;
-    IsWrite = true;
-    break;
   case X86::MOV8rm:
     AccessSize = 1;
     break;
   case X86::MOV16mi:
   case X86::MOV16mr:
-    AccessSize = 2;
-    IsWrite = true;
-    break;
   case X86::MOV16rm:
     AccessSize = 2;
     break;
   case X86::MOV32mi:
   case X86::MOV32mr:
-    AccessSize = 4;
-    IsWrite = true;
-    break;
   case X86::MOV32rm:
     AccessSize = 4;
     break;
   case X86::MOV64mi32:
   case X86::MOV64mr:
-    AccessSize = 8;
-    IsWrite = true;
-    break;
   case X86::MOV64rm:
     AccessSize = 8;
     break;
   case X86::MOVAPDmr:
   case X86::MOVAPSmr:
-    AccessSize = 16;
-    IsWrite = true;
-    break;
   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) {
     MCParsedAsmOperand *Op = Operands[Ix];
     if (Op && Op->isMem())
       InstrumentMemOperand(Op, AccessSize, IsWrite, Ctx, Out);
   }
 }
 
 class X86AddressSanitizer32 : public X86AddressSanitizer {

 
 } // End anonymous namespace
 
 X86AsmInstrumentation::X86AsmInstrumentation() {}
 X86AsmInstrumentation::~X86AsmInstrumentation() {}
 
 void X86AsmInstrumentation::InstrumentInstruction(
     const MCInst &Inst, SmallVectorImpl<MCParsedAsmOperand *> &Operands,
-    MCContext &Ctx, MCStreamer &Out) {}
+    MCContext &Ctx, const MCInstrInfo &MII, MCStreamer &Out) {}
 
 X86AsmInstrumentation *
 CreateX86AsmInstrumentation(const MCTargetOptions &MCOptions, const MCContext &Ctx,
                             const MCSubtargetInfo &STI) {
   if (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();
 }
 
 } // End llvm namespace

lib/Target/X86/AsmParser/X86AsmParser.cpp

 #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"
 #include "llvm/MC/MCExpr.h"
 #include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCInstrInfo.h"
 #include "llvm/MC/MCParser/MCAsmLexer.h"
 #include "llvm/MC/MCParser/MCAsmParser.h"
 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
 #include "llvm/MC/MCRegisterInfo.h"
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/MC/MCSymbol.h"
 #include "llvm/MC/MCTargetAsmParser.h"
static const char OpPrecedence[] = {
   6, // IC_LPAREN
   0, // IC_IMM
   0  // IC_REGISTER
 };
 
 class X86AsmParser : public MCTargetAsmParser {
   MCSubtargetInfo &STI;
   MCAsmParser &Parser;
+  const MCInstrInfo &MII;
   ParseInstructionInfo *InstInfo;
   std::unique_ptr<X86AsmInstrumentation> Instrumentation;
 private:
   SMLoc consumeToken() {
     SMLoc Result = Parser.getTok().getLoc();
     Parser.Lex();
     return Result;
   }

 
 #define GET_ASSEMBLER_HEADER
 #include "X86GenAsmMatcher.inc"
 
   /// }
 
 public:
   X86AsmParser(MCSubtargetInfo &sti, MCAsmParser &parser,
-               const MCInstrInfo &MII,
+               const MCInstrInfo &mii,
                const MCTargetOptions &Options)
-      : MCTargetAsmParser(), STI(sti), Parser(parser), InstInfo(0) {
+      : MCTargetAsmParser(), STI(sti), Parser(parser), MII(mii), InstInfo(0) {
 
     // Initialize the set of available features.
     setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
     Instrumentation.reset(
         CreateX86AsmInstrumentation(Options, Parser.getContext(), STI));
   }
 
   bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc) override;
case X86::VMOVSSrr: {
     return true;
   }
   }
 }
 
 static const char *getSubtargetFeatureName(unsigned Val);
 
 void X86AsmParser::EmitInstruction(
-    MCInst &Inst, SmallVectorImpl<MCParsedAsmOperand *> &Operands,
-    MCStreamer &Out) {
-  Instrumentation->InstrumentInstruction(Inst, Operands, getContext(), Out);
+    MCInst& Inst,
+    SmallVectorImpl<MCParsedAsmOperand*>& Operands,
+    MCStreamer& Out) {
+  Instrumentation->InstrumentInstruction(
+      Inst, Operands, getContext(), MII, Out);
   Out.EmitInstruction(Inst, STI);
 }
 
 bool X86AsmParser::
 MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
                         SmallVectorImpl<MCParsedAsmOperand*> &Operands,
                         MCStreamer &Out, unsigned &ErrorInfo,
                         bool MatchingInlineAsm) {