Replace cc1 options '-mdisable-fp-elim' and '-momit-leaf-frame-pointer' with '-mframe-pointer'

[ychen]

Summary

After D56351 and D64294, frame pointer handling is migrated to tri-state (all, non-leaf, none) in clang driver and on the function attribute. This patch makes the frame pointer handling cc1 option tri-state.

[ychen]

gentle ping

[chandlerc]

Wow, thanks for the cleanups. This is much easier to read as a consequence. And sorry it took a while to get you another round of review. Comments below.

include/clang/Driver/CC1Options.td

270 ↗

(On Diff #180368)

Should say more Specify which frame pointers to retain (all, non-leaf, none).

lib/Driver/ToolChains/Clang.cpp

574 ↗

(On Diff #180368)

Keep LLVM coding convention naming pattern please.

576–579 ↗

(On Diff #180368)

This still doesn't make sense to me...

If the user specifies -fomit-frame-point or -fno-omit-frame-pointer *after* -momit-leaf-frame-pointer or -mno-omit-leaf-frame-pointer, then that last flag should win...

I think you need to first get the "base" FP state by checking the main two flags. Then you need to get the "last" FP state by checking *all four flags*. When the last flag is a leaf flag, then the state is determined by the base + the last. When the last flag is not one of the leaf flags, then the last flag fully specifies the result.

I think you can also process these variables into something simpler to test below, essentially handling all the matching logic in one place.

[ychen]

Thanks for the review!

• address comments

[ychen]

lib/Driver/ToolChains/Clang.cpp

576–579 ↗

(On Diff #180368)

I see the point here. I didn't do it since it deviates from GCC/intel compiler behavior. Could you please confirm we really want that?

One example from here is : -momit-leaf-frame-pointer -fno-omit-frame-pointer
(https://software.intel.com/en-us/cpp-compiler-developer-guide-and-reference-momit-leaf-frame-pointer)

For GCC/intel, this is frame-pointer=non-leaf, for us, it will be frame-pointer=all

[ychen]

ping

[MaskRay]

This should be rebased after D64294.

[ychen]

• rebase after D64294.

[MaskRay]

clang/include/clang/Basic/CodeGenOptions.h

120

We can probably use enum class FramePointerKind { None, NonLeaf, All }; here.. (enum class ClassABI is an example in this file)

clang/lib/CodeGen/CGCall.cpp

1734

llvm_unreachable can be deleted if a switch statement is used.

clang/lib/Driver/ToolChains/Clang.cpp

49

This is probably not necessary. The enum is only used in 2 places below.

3972

llvm_unreachable("unknown FramePointerKind"); can be deleted if a switch statement is used.

clang/lib/Frontend/CompilerInvocation.cpp

845

I guess this can be deleted now.

-pg + FramePointerKind::None is rejected by the driver.

if (Arg *A = Args.getLastArg(options::OPT_pg))
  if (FPKeepKind == FramePointerKind::None)
    D.Diag(diag::err_drv_argument_not_allowed_with) << "-fomit-frame-pointer"
                                                    << A->getAsString(Args);

[ychen]

clang/lib/Frontend/CompilerInvocation.cpp

845

This is still needed for clang/test/CodeGen/x86_64-profiling-keep-fp.c to pass.

We could have another patch to address this and update the test.

[ychen]

• Make FramePointerKind enum class.
• Replace two if-else-if blocks to switch statements.

[MaskRay]

clang/lib/CodeGen/CGCall.cpp

1728

The assert here is not very necessary.

clang/lib/Driver/ToolChains/Clang.cpp

3955

Add a space after switch.

[ychen]

• update

[ychen]

@chandlerc ping?

clang/include/clang/Basic/CodeGenOptions.h

public:
   enum SignReturnAddressScope {
     None,    // No signing for any function
     NonLeaf, // Sign the return address of functions that spill LR
     All      // Sign the return address of all functions
   };
 
   enum SignReturnAddressKeyValue { AKey, BKey };
 
+  enum class FramePointerKind {
+    None,        // Omit all frame pointers.
+    NonLeaf,     // Keep non-leaf frame pointers.
+    All,         // Keep all frame pointers.
+  };
+
   /// The code model to use (-mcmodel).
   std::string CodeModel;
 
   /// The filename with path we use for coverage data files. The runtime
   /// allows further manipulation with the GCOV_PREFIX and GCOV_PREFIX_STRIP
   /// environment variables.
   std::string CoverageDataFile;
 

clang/include/clang/Basic/CodeGenOptions.def

 CODEGENOPT(CoverageNoFunctionNamesInData, 1, 0) ///< Do not include function names in GCDA files.
 CODEGENOPT(CoverageExitBlockBeforeBody, 1, 0) ///< Whether to emit the exit block before the body blocks in GCNO files.
 CODEGENOPT(CXAAtExit         , 1, 1) ///< Use __cxa_atexit for calling destructors.
 CODEGENOPT(RegisterGlobalDtorsWithAtExit, 1, 1) ///< Use atexit or __cxa_atexit to register global destructors.
 CODEGENOPT(CXXCtorDtorAliases, 1, 0) ///< Emit complete ctors/dtors as linker
                                      ///< aliases to base ctors when possible.
 CODEGENOPT(DataSections      , 1, 0) ///< Set when -fdata-sections is enabled.
 CODEGENOPT(UniqueSectionNames, 1, 1) ///< Set for -funique-section-names.
-CODEGENOPT(DisableFPElim     , 1, 0) ///< Set when -fomit-frame-pointer is enabled.
+ENUM_CODEGENOPT(FramePointer, FramePointerKind, 2, FramePointerKind::None) /// frame-pointer: all,non-leaf,none
+
 CODEGENOPT(DisableFree       , 1, 0) ///< Don't free memory.
 CODEGENOPT(DiscardValueNames , 1, 0) ///< Discard Value Names from the IR (LLVMContext flag)
 CODEGENOPT(DisableGCov       , 1, 0) ///< Don't run the GCov pass, for testing.
 CODEGENOPT(DisableLLVMPasses , 1, 0) ///< Don't run any LLVM IR passes to get
                                      ///< the pristine IR generated by the
                                      ///< frontend.
 CODEGENOPT(DisableLifetimeMarkers, 1, 0) ///< Don't emit any lifetime markers
 CODEGENOPT(DisableO0ImplyOptNone , 1, 0) ///< Don't annonate function with optnone at O0

 CODEGENOPT(StrictFloatCastOverflow, 1, 1)
 
 CODEGENOPT(UniformWGSize     , 1, 0) ///< -cl-uniform-work-group-size
 CODEGENOPT(NoZeroInitializedInBSS , 1, 0) ///< -fno-zero-initialized-in-bss.
 /// Method of Objective-C dispatch to use.
 ENUM_CODEGENOPT(ObjCDispatchMethod, ObjCDispatchMethodKind, 2, Legacy)
 /// Replace certain message sends with calls to ObjC runtime entrypoints
 CODEGENOPT(ObjCConvertMessagesToRuntimeCalls , 1, 1)
-CODEGENOPT(OmitLeafFramePointer , 1, 0) ///< Set when -momit-leaf-frame-pointer is
-                                        ///< enabled.
 
 VALUE_CODEGENOPT(OptimizationLevel, 2, 0) ///< The -O[0-3] option specified.
 VALUE_CODEGENOPT(OptimizeSize, 2, 0) ///< If -Os (==1) or -Oz (==2) is specified.
 
 /// Choose profile instrumenation kind or no instrumentation.
 ENUM_CODEGENOPT(ProfileInstr, ProfileInstrKind, 2, ProfileNone)
 /// Choose profile kind for PGO use compilation.
 ENUM_CODEGENOPT(ProfileUse, ProfileInstrKind, 2, ProfileNone)

clang/include/clang/Driver/CC1Options.td

 def new_struct_path_tbaa : Flag<["-"], "new-struct-path-tbaa">,
   HelpText<"Enable enhanced struct-path aware Type Based Alias Analysis">;
 def masm_verbose : Flag<["-"], "masm-verbose">,
   HelpText<"Generate verbose assembly output">;
 def mcode_model : Separate<["-"], "mcode-model">,
   HelpText<"The code model to use">, Values<"tiny,small,kernel,medium,large">;
 def mdebug_pass : Separate<["-"], "mdebug-pass">,
   HelpText<"Enable additional debug output">;
-def mdisable_fp_elim : Flag<["-"], "mdisable-fp-elim">,
-  HelpText<"Disable frame pointer elimination optimization">;
+def mframe_pointer_EQ : Joined<["-"], "mframe-pointer=">,
+  HelpText<"Specify which frame pointers to retain (all, non-leaf, none).">, Values<"all,non-leaf,none">;
 def mdisable_tail_calls : Flag<["-"], "mdisable-tail-calls">,
   HelpText<"Disable tail call optimization, keeping the call stack accurate">;
 def menable_no_infinities : Flag<["-"], "menable-no-infs">,
   HelpText<"Allow optimization to assume there are no infinities.">;
 def menable_no_nans : Flag<["-"], "menable-no-nans">,
   HelpText<"Allow optimization to assume there are no NaNs.">;
 def menable_unsafe_fp_math : Flag<["-"], "menable-unsafe-fp-math">,
   HelpText<"Allow unsafe floating-point math optimizations which may decrease "

clang/include/clang/Driver/Options.td

 
 def mbackchain : Flag<["-"], "mbackchain">, Group<m_Group>, Flags<[DriverOption,CC1Option]>,
   HelpText<"Link stack frames through backchain on System Z">;
 def mno_backchain : Flag<["-"], "mno-backchain">, Group<m_Group>, Flags<[DriverOption,CC1Option]>;
 
 def mno_warn_nonportable_cfstrings : Flag<["-"], "mno-warn-nonportable-cfstrings">, Group<m_Group>;
 def mno_omit_leaf_frame_pointer : Flag<["-"], "mno-omit-leaf-frame-pointer">, Group<m_Group>;
 def momit_leaf_frame_pointer : Flag<["-"], "momit-leaf-frame-pointer">, Group<m_Group>,
-  HelpText<"Omit frame pointer setup for leaf functions">, Flags<[CC1Option]>;
+  HelpText<"Omit frame pointer setup for leaf functions">;
 def moslib_EQ : Joined<["-"], "moslib=">, Group<m_Group>;
 def mpascal_strings : Flag<["-"], "mpascal-strings">, Alias<fpascal_strings>;
 def mred_zone : Flag<["-"], "mred-zone">, Group<m_Group>;
 def mtls_direct_seg_refs : Flag<["-"], "mtls-direct-seg-refs">, Group<m_Group>,
   HelpText<"Enable direct TLS access through segment registers (default)">;
 def mregparm_EQ : Joined<["-"], "mregparm=">, Group<m_Group>;
 def mrelax_all : Flag<["-"], "mrelax-all">, Group<m_Group>, Flags<[CC1Option,CC1AsOption]>,
   HelpText<"(integrated-as) Relax all machine instructions">;

clang/lib/CodeGen/CGCall.cpp

void CodeGenModule::ConstructDefaultFnAttrList(StringRef Name, bool HasOptnone,
   if (AttrOnCallSite) {
     // Attributes that should go on the call site only.
     if (!CodeGenOpts.SimplifyLibCalls ||
         CodeGenOpts.isNoBuiltinFunc(Name.data()))
       FuncAttrs.addAttribute(llvm::Attribute::NoBuiltin);
     if (!CodeGenOpts.TrapFuncName.empty())
       FuncAttrs.addAttribute("trap-func-name", CodeGenOpts.TrapFuncName);
   } else {
-    // Attributes that should go on the function, but not the call site.
-    if (!CodeGenOpts.DisableFPElim) {
-      FuncAttrs.addAttribute("no-frame-pointer-elim", "false");
-    } else if (CodeGenOpts.OmitLeafFramePointer) {
-      FuncAttrs.addAttribute("no-frame-pointer-elim", "false");
-      FuncAttrs.addAttribute("no-frame-pointer-elim-non-leaf");
-    } else {
-      FuncAttrs.addAttribute("no-frame-pointer-elim", "true");
-      FuncAttrs.addAttribute("no-frame-pointer-elim-non-leaf");
+    StringRef FpKind;
+    switch (CodeGenOpts.getFramePointer()) {
+    case CodeGenOptions::FramePointerKind::None:
+      FpKind = "none";
+      break;
+    case CodeGenOptions::FramePointerKind::NonLeaf:
+      FpKind = "non-leaf";
+      break;
+    case CodeGenOptions::FramePointerKind::All:
+      FpKind = "all";
+      break;
     }
+    assert(!FpKind.empty() && "unknown frame-pointer");
+    FuncAttrs.addAttribute("frame-pointer", FpKind);
 
     FuncAttrs.addAttribute("less-precise-fpmad",
                            llvm::toStringRef(CodeGenOpts.LessPreciseFPMAD));
 
     if (CodeGenOpts.NullPointerIsValid)
       FuncAttrs.addAttribute("null-pointer-is-valid", "true");
     if (!CodeGenOpts.FPDenormalMode.empty())
       FuncAttrs.addAttribute("denormal-fp-math", CodeGenOpts.FPDenormalMode);
 
     FuncAttrs.addAttribute("no-trapping-math",
                            llvm::toStringRef(CodeGenOpts.NoTrappingMath));
 
     // Strict (compliant) code is the default, so only add this attribute to

clang/lib/Driver/ToolChains/Clang.cpp

 #include "Arch/X86.h"
 #include "AMDGPU.h"
 #include "CommonArgs.h"
 #include "Hexagon.h"
 #include "MSP430.h"
 #include "InputInfo.h"
 #include "PS4CPU.h"
 #include "clang/Basic/CharInfo.h"
+#include "clang/Basic/CodeGenOptions.h"
 #include "clang/Basic/LangOptions.h"
 #include "clang/Basic/ObjCRuntime.h"
 #include "clang/Basic/Version.h"
 #include "clang/Driver/Distro.h"
 #include "clang/Driver/DriverDiagnostic.h"
 #include "clang/Driver/Options.h"
 #include "clang/Driver/SanitizerArgs.h"
 #include "clang/Driver/XRayArgs.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/Config/llvm-config.h"
 #include "llvm/Option/ArgList.h"
 #include "llvm/Support/CodeGen.h"
 #include "llvm/Support/Compression.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/Process.h"
 #include "llvm/Support/TargetParser.h"
 #include "llvm/Support/YAMLParser.h"
 
 #ifdef LLVM_ON_UNIX
 #include <unistd.h> // For getuid().
 #endif
 
 using namespace clang::driver;
 using namespace clang::driver::tools;
 using namespace clang;
 using namespace llvm::opt;
 
 static void CheckPreprocessingOptions(const Driver &D, const ArgList &Args) {
   if (Arg *A =
           Args.getLastArg(clang::driver::options::OPT_C, options::OPT_CC)) {
     if (!Args.hasArg(options::OPT_E) && !Args.hasArg(options::OPT__SLASH_P) &&
static codegenoptions::DebugInfoKind DebugLevelToInfoKind(const Arg &A) {
   if (A.getOption().matches(options::OPT_gline_tables_only) ||
       A.getOption().matches(options::OPT_ggdb1))
     return codegenoptions::DebugLineTablesOnly;
   if (A.getOption().matches(options::OPT_gline_directives_only))
     return codegenoptions::DebugDirectivesOnly;
   return codegenoptions::LimitedDebugInfo;
 }
 
-enum class FramePointerKind { None, NonLeaf, All };
-
 static bool mustUseNonLeafFramePointerForTarget(const llvm::Triple &Triple) {
   switch (Triple.getArch()){
   default:
     return false;
   case llvm::Triple::arm:
   case llvm::Triple::thumb:
     // ARM Darwin targets require a frame pointer to be always present to aid
     // offline debugging via backtraces.
default:
       // pointers are not generally useful.
       return false;
     }
   }
 
   return true;
 }
 
-static FramePointerKind getFramePointerKind(const ArgList &Args,
-                                            const llvm::Triple &Triple) {
+static CodeGenOptions::FramePointerKind
+getFramePointerKind(const ArgList &Args, const llvm::Triple &Triple) {
   Arg *A = Args.getLastArg(options::OPT_fomit_frame_pointer,
                            options::OPT_fno_omit_frame_pointer);
   bool OmitFP = A && A->getOption().matches(options::OPT_fomit_frame_pointer);
   bool NoOmitFP =
       A && A->getOption().matches(options::OPT_fno_omit_frame_pointer);
   if (NoOmitFP || mustUseNonLeafFramePointerForTarget(Triple) ||
       (!OmitFP && useFramePointerForTargetByDefault(Args, Triple))) {
     if (Args.hasFlag(options::OPT_momit_leaf_frame_pointer,
                      options::OPT_mno_omit_leaf_frame_pointer,
                      Triple.isPS4CPU()))
-      return FramePointerKind::NonLeaf;
-    return FramePointerKind::All;
+      return CodeGenOptions::FramePointerKind::NonLeaf;
+    return CodeGenOptions::FramePointerKind::All;
   }
-  return FramePointerKind::None;
+  return CodeGenOptions::FramePointerKind::None;
 }
 
 /// Add a CC1 option to specify the debug compilation directory.
 static void addDebugCompDirArg(const ArgList &Args, ArgStringList &CmdArgs,
                                const llvm::vfs::FileSystem &VFS) {
   if (Arg *A = Args.getLastArg(options::OPT_fdebug_compilation_dir)) {
     CmdArgs.push_back("-fdebug-compilation-dir");
     CmdArgs.push_back(A->getValue());
if (TC.getArch() != llvm::Triple::x86) {
       assert(A->getOption().matches(options::OPT_freg_struct_return));
       CmdArgs.push_back("-freg-struct-return");
     }
   }
 
   if (Args.hasFlag(options::OPT_mrtd, options::OPT_mno_rtd, false))
     CmdArgs.push_back("-fdefault-calling-conv=stdcall");
 
-  FramePointerKind FPKeepKind = getFramePointerKind(Args, RawTriple);
-  if (FPKeepKind != FramePointerKind::None) {
-    CmdArgs.push_back("-mdisable-fp-elim");
-    if (FPKeepKind == FramePointerKind::NonLeaf)
-      CmdArgs.push_back("-momit-leaf-frame-pointer");
+  CodeGenOptions::FramePointerKind FPKeepKind =
+                  getFramePointerKind(Args, RawTriple);
+  const char *FPKeepKindStr = nullptr;
+  switch(FPKeepKind) {
+  case CodeGenOptions::FramePointerKind::None:
+    FPKeepKindStr = "-mframe-pointer=none";
+    break;
+  case CodeGenOptions::FramePointerKind::NonLeaf:
+    FPKeepKindStr = "-mframe-pointer=non-leaf";
+    break;
+  case CodeGenOptions::FramePointerKind::All:
+    FPKeepKindStr = "-mframe-pointer=all";
+    break;
   }
+  assert(FPKeepKindStr && "unknown FramePointerKind");
+  CmdArgs.push_back(FPKeepKindStr);
+
   if (!Args.hasFlag(options::OPT_fzero_initialized_in_bss,
                     options::OPT_fno_zero_initialized_in_bss))
     CmdArgs.push_back("-mno-zero-initialized-in-bss");
 
   bool OFastEnabled = isOptimizationLevelFast(Args);
   // If -Ofast is the optimization level, then -fstrict-aliasing should be
   // enabled.  This alias option is being used to simplify the hasFlag logic.
   OptSpecifier StrictAliasingAliasOption =
       OFastEnabled ? options::OPT_Ofast : options::OPT_fstrict_aliasing;
   // We turn strict aliasing off by default if we're in CL mode, since MSVC
   // doesn't do any TBAA.
   bool TBAAOnByDefault = !D.IsCLMode();

   // Make the compile command echo its inputs for /showFilenames.
   if (Output.getType() == types::TY_Object &&
       Args.hasFlag(options::OPT__SLASH_showFilenames,
                    options::OPT__SLASH_showFilenames_, false)) {
     C.getJobs().getJobs().back()->setPrintInputFilenames(true);
   }
 
   if (Arg *A = Args.getLastArg(options::OPT_pg))
-    if (FPKeepKind == FramePointerKind::None)
+    if (FPKeepKind == CodeGenOptions::FramePointerKind::None)
       D.Diag(diag::err_drv_argument_not_allowed_with) << "-fomit-frame-pointer"
                                                       << A->getAsString(Args);
 
   // Claim some arguments which clang supports automatically.
 
   // -fpch-preprocess is used with gcc to add a special marker in the output to
   // include the PCH file.
   Args.ClaimAllArgs(options::OPT_fpch_preprocess);

clang/lib/Frontend/CompilerInvocation.cpp

static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
   Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
   Opts.RegisterGlobalDtorsWithAtExit =
       Args.hasArg(OPT_fregister_global_dtors_with_atexit);
   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
   Opts.CodeModel = TargetOpts.CodeModel;
   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
-  Opts.DisableFPElim =
-      (Args.hasArg(OPT_mdisable_fp_elim) || Args.hasArg(OPT_pg));
+
+  // Handle -mframe-pointer option.
+  if (Arg *A = Args.getLastArg(OPT_mframe_pointer_EQ)) {
+    CodeGenOptions::FramePointerKind FP;
+    StringRef Name = A->getValue();
+    bool ValidFP = true;
+    if (Name == "none")
+      FP = CodeGenOptions::FramePointerKind::None;
+    else if (Name == "non-leaf")
+      FP = CodeGenOptions::FramePointerKind::NonLeaf;
+    else if (Name == "all")
+      FP = CodeGenOptions::FramePointerKind::All;
+    else {
+      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
+      Success = false;
+      ValidFP = false;
+    }
+    if (ValidFP)
+      Opts.setFramePointer(FP);
+  }
+
+  // -pg may override -mframe-pointer
+  // TODO: This should be merged into getFramePointerKind in Clang.cpp.
+  if (Args.hasArg(OPT_pg))
+    Opts.setFramePointer(CodeGenOptions::FramePointerKind::All);
+
   Opts.DisableFree = Args.hasArg(OPT_disable_free);
   Opts.DiscardValueNames = Args.hasArg(OPT_discard_value_names);
   Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
   Opts.NoEscapingBlockTailCalls =
       Args.hasArg(OPT_fno_escaping_block_tail_calls);
   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
   Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable) ||
                           Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.FatalWarnings = Args.hasArg(OPT_massembler_fatal_warnings);
   Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
   Opts.IncrementalLinkerCompatible =
       Args.hasArg(OPT_mincremental_linker_compatible);
   Opts.PIECopyRelocations =
       Args.hasArg(OPT_mpie_copy_relocations);
   Opts.NoPLT = Args.hasArg(OPT_fno_plt);
-  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
   Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
   Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
   Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
   Opts.StrictReturn = !Args.hasArg(OPT_fno_strict_return);
   Opts.StrictVTablePointers = Args.hasArg(OPT_fstrict_vtable_pointers);
   Opts.ForceEmitVTables = Args.hasArg(OPT_fforce_emit_vtables);
   Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||

clang/test/CodeGen/msp430-fp-elim.c

 // REQUIRES: msp430-registered-target
-// RUN: %clang_cc1 -mdisable-fp-elim -triple msp430 -S %s -o - | FileCheck %s --check-prefix=FP_ENFORCED
+// RUN: %clang_cc1 -mframe-pointer=all -triple msp430 -S %s -o - | FileCheck %s --check-prefix=FP_ENFORCED
 // RUN: %clang_cc1 -triple msp430 -S %s -o - | FileCheck %s --check-prefix=FP_DEFAULT
 
 // Check the frame pointer is not used on MSP430 by default, but can be forcibly turned on.
 
 // FP_ENFORCED: push r4
 // FP_ENFORCED: mov r4, r4
 // FP_ENFORCED: pop r4
 // FP_DEFAULT: .globl fp_elim_check

clang/test/CodeGen/x86_64-profiling-keep-fp.c

 // REQUIRES: x86-registered-target
 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -O3 -pg -S -o - %s | \
 // RUN:   FileCheck %s
-// RUN: %clang_cc1 -triple x86_64-unknown-unknown -O3 -momit-leaf-frame-pointer -pg -S -o - %s | \
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -O3 -mframe-pointer=all -pg -S -o - %s | \
+// RUN:   FileCheck %s
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -O3 -mframe-pointer=non-leaf -pg -S -o - %s | \
 // RUN:   FileCheck %s
 
 // Test that the frame pointer is kept when compiling with
 // profiling.
 
 //CHECK: pushq %rbp
 int main(void)
 {
   return 0;
 }

clang/test/CodeGen/xcore-abi.c

 }
 
 // CHECK-LABEL: define zeroext i8 @testchar()
 // CHECK: ret i8 -1
 char testchar (void) {
   return (char)-1;
 }
 
-// CHECK: "no-frame-pointer-elim"="false"
-// CHECK-NOT: "no-frame-pointer-elim-non-leaf"
+// CHECK: "frame-pointer"="none"

clang/test/CodeGen/xcore-abi.cpp

 // getLanguageLinkage() via a null 'VarDecl*'. This was an XCore specific
 // conditional call to GV->setSection(".cp.rodata").
 class C {
 public:
   ~C(){};
 };
 C c;
 
-// CHECK: "no-frame-pointer-elim"="false"
-// CHECK-NOT: "no-frame-pointer-elim-non-leaf"
+// CHECK: "frame-pointer"="none"

clang/test/CodeGenCXX/global-init.cpp

 // RUN: %clang_cc1 -triple=x86_64-apple-darwin10 -emit-llvm -fexceptions %s -o - |FileCheck %s
 // RUN: %clang_cc1 -triple=x86_64-apple-darwin10 -emit-llvm %s -o - |FileCheck -check-prefix CHECK-NOEXC %s
-// RUN: %clang_cc1 -triple=x86_64-apple-darwin10 -emit-llvm \
-// RUN:     -momit-leaf-frame-pointer -mdisable-fp-elim %s -o - \
+// RUN: %clang_cc1 -triple=x86_64-apple-darwin10 -emit-llvm -mframe-pointer=non-leaf %s -o - \
 // RUN:   | FileCheck -check-prefix CHECK-FP %s
 
 struct A {
   A();
   ~A();
 };
 
 struct B { B(); ~B(); };

 
 // rdar://problem/8090834: this should be nounwind
 // CHECK-NOEXC: define internal void @_GLOBAL__sub_I_global_init.cpp() [[NUW:#[0-9]+]] section "__TEXT,__StaticInit,regular,pure_instructions" {
 
 // CHECK-NOEXC: attributes [[NUW]] = { noinline nounwind{{.*}} }
 
 // PR21811: attach the appropriate attribute to the global init function
 // CHECK-FP: define internal void @_GLOBAL__sub_I_global_init.cpp() [[NUX:#[0-9]+]] section "__TEXT,__StaticInit,regular,pure_instructions" {
-// CHECK-FP: attributes [[NUX]] = { noinline nounwind {{.*}}"no-frame-pointer-elim-non-leaf"{{.*}} }
+// CHECK-FP: attributes [[NUX]] = { noinline nounwind {{.*}}"frame-pointer"="non-leaf"{{.*}} }

clang/test/CodeGenObjCXX/msabi-stret.mm

-// RUN: %clang_cc1 -triple i686-unknown-windows-msvc -fobjc-runtime=ios-6.0 -Os -S -emit-llvm -o - %s -mdisable-fp-elim | FileCheck %s
+// RUN: %clang_cc1 -triple i686-unknown-windows-msvc -fobjc-runtime=ios-6.0 -Os -S -emit-llvm -o - %s -mframe-pointer=all | FileCheck %s
 
 struct S {
   S() = default;
   S(const S &) {}
 };
 
 @interface I
 + (S)m:(S)s;
 @end
 
 S f() {
   return [I m:S()];
 }
 
 // CHECK: declare dso_local void @objc_msgSend_stret(i8*, i8*, ...)
 // CHECK-NOT: declare dllimport void @objc_msgSend(i8*, i8*, ...)

clang/test/Driver/cl-options.c

 // RUN: %clang_cl /Oi- /Oi -### -- %s 2>&1 | FileCheck -check-prefix=Oi %s
 // Oi-NOT: -fno-builtin
 
 // RUN: %clang_cl /Oi- -### -- %s 2>&1 | FileCheck -check-prefix=Oi_ %s
 // Oi_: -fno-builtin
 
 // RUN: %clang_cl /Os --target=i686-pc-windows-msvc -### -- %s 2>&1 | FileCheck -check-prefix=Os %s
 // RUN: %clang_cl /Os --target=x86_64-pc-windows-msvc -### -- %s 2>&1 | FileCheck -check-prefix=Os %s
-// Os-NOT: -mdisable-fp-elim
-// Os-NOT: -momit-leaf-frame-pointer
+// Os: -mframe-pointer=none
 // Os: -Os
 
 // RUN: %clang_cl /Ot --target=i686-pc-windows-msvc -### -- %s 2>&1 | FileCheck -check-prefix=Ot %s
 // RUN: %clang_cl /Ot --target=x86_64-pc-windows-msvc -### -- %s 2>&1 | FileCheck -check-prefix=Ot %s
-// Ot-NOT: -mdisable-fp-elim
-// Ot-NOT: -momit-leaf-frame-pointer
+// Ot: -mframe-pointer=none
 // Ot: -O2
 
 // RUN: %clang_cl /Ox --target=i686-pc-windows-msvc -### -- %s 2>&1 | FileCheck -check-prefix=Ox %s
 // RUN: %clang_cl /Ox --target=x86_64-pc-windows-msvc -### -- %s 2>&1 | FileCheck -check-prefix=Ox %s
-// Ox-NOT: -mdisable-fp-elim
-// Ox-NOT: -momit-leaf-frame-pointer
+// Ox: -mframe-pointer=none
 // Ox: -O2
 
 // RUN: %clang_cl --target=i686-pc-win32 /O2sy- -### -- %s 2>&1 | FileCheck -check-prefix=PR24003 %s
-// PR24003: -mdisable-fp-elim
-// PR24003-NOT: -momit-leaf-frame-pointer
+// PR24003: -mframe-pointer=all
 // PR24003: -Os
 
 // RUN: %clang_cl --target=i686-pc-win32 -Werror /Oy- /O2 -### -- %s 2>&1 | FileCheck -check-prefix=Oy_2 %s
-// Oy_2-NOT: -momit-leaf-frame-pointer
+// Oy_2: -mframe-pointer=all
 // Oy_2: -O2
 
 // RUN: %clang_cl --target=aarch64-pc-windows-msvc -Werror /Oy- /O2 -### -- %s 2>&1 | FileCheck -check-prefix=Oy_aarch64 %s
-// Oy_aarch64: -mdisable-fp-elim
+// Oy_aarch64: -mframe-pointer=all
 // Oy_aarch64: -O2
 
 // RUN: %clang_cl --target=i686-pc-win32 -Werror /O2 /O2 -### -- %s 2>&1 | FileCheck -check-prefix=O2O2 %s
 // O2O2: "-O2"
 
 // RUN: %clang_cl /Zs -Werror /Oy -- %s 2>&1
 
 // RUN: %clang_cl --target=i686-pc-win32 -Werror /Oy- -### -- %s 2>&1 | FileCheck -check-prefix=Oy_ %s
-// Oy_: -mdisable-fp-elim
+// Oy_: -mframe-pointer=all
 
 // RUN: %clang_cl /Qvec -### -- %s 2>&1 | FileCheck -check-prefix=Qvec %s
 // Qvec: -vectorize-loops
 
 // RUN: %clang_cl /Qvec /Qvec- -### -- %s 2>&1 | FileCheck -check-prefix=Qvec_ %s
 // Qvec_-NOT: -vectorize-loops
 
 // RUN: %clang_cl /showIncludes -### -- %s 2>&1 | FileCheck -check-prefix=showIncludes %s

clang/test/Driver/clang-translation.c

 // RUN: %clang -target i386-unknown-unknown -### -S -O0 -Os %s -o %t.s -fverbose-asm -funwind-tables -fvisibility=hidden 2>&1 | FileCheck -check-prefix=I386 %s
 // I386: "-triple" "i386-unknown-unknown"
 // I386: "-S"
 // I386: "-disable-free"
 // I386: "-mrelocation-model" "static"
-// I386: "-mdisable-fp-elim"
+// I386: "-mframe-pointer=all"
 // I386: "-masm-verbose"
 // I386: "-munwind-tables"
 // I386: "-Os"
 // I386: "-fvisibility"
 // I386: "hidden"
 // I386: "-o"
 // I386: clang-translation
 

clang/test/Driver/frame-pointer-elim.c

-// KEEP-ALL: "-mdisable-fp-elim"
-// KEEP-ALL-NOT: "-momit-leaf-frame-pointer"
-
-// KEEP-NON-LEAF: "-mdisable-fp-elim"
-// KEEP-NON-LEAF: "-momit-leaf-frame-pointer"
-
-// KEEP-NONE-NOT: "-mdisable-fp-elim"
-// KEEP-NONE-NOT: "-momit-leaf-frame-pointer"
+// KEEP-ALL:      "-mframe-pointer=all"
+// KEEP-NON-LEAF: "-mframe-pointer=non-leaf"
+// KEEP-NONE:     "-mframe-pointer=none"
 
 // On Linux x86, omit frame pointer when optimization is enabled.
 // RUN: %clang -### -target i386-linux -S -fomit-frame-pointer %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=KEEP-NONE %s
 // RUN: %clang -### -target i386-linux -S -O1 %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=KEEP-NONE %s
 
 // -fno-omit-frame-pointer or -pg disables frame pointer omission.

 // RUN:   FileCheck --check-prefix=KEEP-NONE %s
 
 // RUN: %clang -### -target i386-darwin -S -momit-leaf-frame-pointer %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=KEEP-NON-LEAF %s
 
 // RUN: %clang -### -target armv7s-apple-ios -fomit-frame-pointer %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=WARN-OMIT-7S %s
 // WARN-OMIT-7S: warning: optimization flag '-fomit-frame-pointer' is not supported for target 'armv7s'
-// WARN-OMIT-7S: "-mdisable-fp-elim"
-// WARN-OMIT-7S-NOT: "-momit-leaf-frame-pointer"
+// WARN-OMIT-7S: "-mframe-pointer=all"
 
 // RUN: %clang -### -target armv7k-apple-watchos -fomit-frame-pointer %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=WARN-OMIT-7K %s
 // WARN-OMIT-7K: warning: optimization flag '-fomit-frame-pointer' is not supported for target 'armv7k'
-// WARN-OMIT-7K: "-mdisable-fp-elim"
-// WARN-OMIT-7K-NOT: "-momit-leaf-frame-pointer"
+// WARN-OMIT-7K: "-mframe-pointer=all"
 
 // RUN: %clang -### -target armv7s-apple-ios8.0 -momit-leaf-frame-pointer %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=WARN-OMIT-LEAF-7S %s
 // WARN-OMIT-LEAF-7S-NOT: warning: optimization flag '-momit-leaf-frame-pointer' is not supported for target 'armv7s'
-// WARN-OMIT-LEAF-7S: "-mdisable-fp-elim"
-// WARN-OMIT-LEAF-7S: "-momit-leaf-frame-pointer"
+// WARN-OMIT-LEAF-7S: "-mframe-pointer=non-leaf"
 
 // On the PS4, we default to omitting the frame pointer on leaf functions
 // RUN: %clang -### -target x86_64-scei-ps4 -S %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=KEEP-NON-LEAF %s
 // RUN: %clang -### -target x86_64-scei-ps4 -S -O2 %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=KEEP-NON-LEAF %s
 
 // RUN: %clang -### -target powerpc64 -S %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=KEEP-ALL %s
 // RUN: %clang -### -target powerpc64 -S -O1 %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=KEEP-NONE %s
 
 void f0() {}
 void f1() { f0(); }

clang/test/Driver/frame-pointer.c

 // RUN: %clang -target riscv32-unknown-linux-gnu -### -S -Os %s -o %t.s 2>&1 | FileCheck -check-prefix=CHECKs-32 %s
 
 // RUN: %clang -target riscv64-unknown-linux-gnu -### -S -O0 %s -o %t.s 2>&1 | FileCheck -check-prefix=CHECK0-64 %s
 // RUN: %clang -target riscv64-unknown-linux-gnu -### -S -O1 %s -o %t.s 2>&1 | FileCheck -check-prefix=CHECK1-64 %s
 // RUN: %clang -target riscv64-unknown-linux-gnu -### -S -O2 %s -o %t.s 2>&1 | FileCheck -check-prefix=CHECK2-64 %s
 // RUN: %clang -target riscv64-unknown-linux-gnu -### -S -O3 %s -o %t.s 2>&1 | FileCheck -check-prefix=CHECK3-64 %s
 // RUN: %clang -target riscv64-unknown-linux-gnu -### -S -Os %s -o %t.s 2>&1 | FileCheck -check-prefix=CHECKs-64 %s
 
-// CHECK0-32: -mdisable-fp-elim
-// CHECK1-32-NOT: -mdisable-fp-elim
-// CHECK2-32-NOT: -mdisable-fp-elim
-// CHECK3-32-NOT: -mdisable-fp-elim
-// CHECKs-32-NOT: -mdisable-fp-elim
-
-// CHECK0-64: -mdisable-fp-elim
-// CHECK1-64-NOT: -mdisable-fp-elim
-// CHECK2-64-NOT: -mdisable-fp-elim
-// CHECK3-64-NOT: -mdisable-fp-elim
-// CHECKs-64-NOT: -mdisable-fp-elim
-// CHECK-MACHO-64: -mdisable-fp-elim
+// CHECK0-32: -mframe-pointer=all
+// CHECK1-32-NOT: -mframe-pointer=all
+// CHECK2-32-NOT: -mframe-pointer=all
+// CHECK3-32-NOT: -mframe-pointer=all
+// CHECKs-32-NOT: -mframe-pointer=all
+
+// CHECK0-64: -mframe-pointer=all
+// CHECK1-64-NOT: -mframe-pointer=all
+// CHECK2-64-NOT: -mframe-pointer=all
+// CHECK3-64-NOT: -mframe-pointer=all
+// CHECKs-64-NOT: -mframe-pointer=all
+// CHECK-MACHO-64: -mframe-pointer=all

clang/test/Driver/woa-fp.c

 // RUN: %clang -target armv7-windows-msvc -fno-omit-frame-pointer -### -S %s -Os -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-NO-FPO
 
 // RUN: %clang -target armv7-windows-itanium -fno-omit-frame-pointer -### -S %s -O0 -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-NO-FPO
 // RUN: %clang -target armv7-windows-itanium -fno-omit-frame-pointer -### -S %s -O1 -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-NO-FPO
 // RUN: %clang -target armv7-windows-itanium -fno-omit-frame-pointer -### -S %s -O2 -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-NO-FPO
 // RUN: %clang -target armv7-windows-itanium -fno-omit-frame-pointer -### -S %s -O3 -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-NO-FPO
 // RUN: %clang -target armv7-windows-itanium -fno-omit-frame-pointer -### -S %s -Os -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-NO-FPO
 
-// CHECK-DEFAULT: "-mdisable-fp-elim"
-// CHECK-FPO-NOT: "-mdisable-fp-elim"
-// CHECK-NO-FPO: "-mdisable-fp-elim"
+// CHECK-DEFAULT: "-mframe-pointer=all"
+// CHECK-FPO-NOT: "-mframe-pointer=all"
+// CHECK-NO-FPO: "-mframe-pointer=all"
 

clang/test/Driver/xcore-opts.c

 // RUN: %clang -target xcore %s -g -Wl,L1Arg,L2Arg -Wa,A1Arg,A2Arg -fverbose-asm -v -### -o %t.o 2>&1 | FileCheck %s
 // RUN: %clang -target xcore -x c++ %s -g -Wl,L1Arg,L2Arg -Wa,A1Arg,A2Arg -fverbose-asm -v -### -o %t.o 2>&1 | FileCheck %s
 // RUN: %clang -target xcore -x c++ %s -fexceptions -### -o %t.o 2>&1 | FileCheck -check-prefix CHECK-EXCEP %s
 // RUN: %clang -target xcore %s -g0 -### -o %t.o 2>&1 | FileCheck -check-prefix CHECK-G0 %s
 
+// CHECK: "-mframe-pointer=none"
 // CHECK: "-nostdsysteminc"
-// CHECK-NOT: "-mdisable-fp-elim"
-// CHECK-NOT: "-momit-leaf-frame-pointer"
 // CHECK: "-fno-signed-char"
 // CHECK: "-fno-use-cxa-atexit"
 // CHECK-NOT: "-fcxx-exceptions"
 // CHECK-NOT: "-fexceptions"
 // CHECK: "-fno-common"
 // CHECK: xcc" "-o"
 // CHECK-NOT: "-fexceptions"
 // CHECK: "-c" "-v" "-g" "-fverbose-asm" "A1Arg" "A2Arg"