diff options
Diffstat (limited to 'llvm/include')
| -rw-r--r-- | llvm/include/llvm/CodeGen/CommandFlags.inc | 25 | ||||
| -rw-r--r-- | llvm/include/llvm/CodeGen/TargetFrameLowering.h | 7 | ||||
| -rw-r--r-- | llvm/include/llvm/Support/CodeGen.h | 5 |
3 files changed, 28 insertions, 9 deletions
diff --git a/llvm/include/llvm/CodeGen/CommandFlags.inc b/llvm/include/llvm/CodeGen/CommandFlags.inc index 6535e068b6e..568d329a5e8 100644 --- a/llvm/include/llvm/CodeGen/CommandFlags.inc +++ b/llvm/include/llvm/CodeGen/CommandFlags.inc @@ -114,10 +114,16 @@ static cl::opt<TargetMachine::CodeGenFileType> FileType( clEnumValN(TargetMachine::CGFT_Null, "null", "Emit nothing, for performance testing"))); -static cl::opt<bool> - DisableFPElim("disable-fp-elim", - cl::desc("Disable frame pointer elimination optimization"), - cl::init(false)); +static cl::opt<llvm::FramePointer::FP> FramePointerUsage( + "frame-pointer", cl::desc("Specify frame pointer elimination optimization"), + cl::init(llvm::FramePointer::None), + cl::values( + clEnumValN(llvm::FramePointer::All, "all", + "Disable frame pointer elimination"), + clEnumValN(llvm::FramePointer::NonLeaf, "non-leaf", + "Disable frame pointer elimination for non-leaf frame"), + clEnumValN(llvm::FramePointer::None, "none", + "Enable frame pointer elimination"))); static cl::opt<bool> EnableUnsafeFPMath( "enable-unsafe-fp-math", @@ -368,9 +374,14 @@ setFunctionAttributes(StringRef CPU, StringRef Features, Module &M) { NewAttrs.addAttribute("target-cpu", CPU); if (!Features.empty()) NewAttrs.addAttribute("target-features", Features); - if (DisableFPElim.getNumOccurrences() > 0) - NewAttrs.addAttribute("no-frame-pointer-elim", - DisableFPElim ? "true" : "false"); + if (FramePointerUsage.getNumOccurrences() > 0) { + if (FramePointerUsage == llvm::FramePointer::All) + NewAttrs.addAttribute("frame-pointer", "all"); + else if (FramePointerUsage == llvm::FramePointer::NonLeaf) + NewAttrs.addAttribute("frame-pointer", "non-leaf"); + else if (FramePointerUsage == llvm::FramePointer::None) + NewAttrs.addAttribute("frame-pointer", "none"); + } if (DisableTailCalls.getNumOccurrences() > 0) NewAttrs.addAttribute("disable-tail-calls", toStringRef(DisableTailCalls)); diff --git a/llvm/include/llvm/CodeGen/TargetFrameLowering.h b/llvm/include/llvm/CodeGen/TargetFrameLowering.h index f8effee998e..b4d1da94143 100644 --- a/llvm/include/llvm/CodeGen/TargetFrameLowering.h +++ b/llvm/include/llvm/CodeGen/TargetFrameLowering.h @@ -207,8 +207,11 @@ public: return false; } - /// Return true if the target needs to disable frame pointer elimination. - virtual bool noFramePointerElim(const MachineFunction &MF) const; + /// Return true if the target wants to keep the frame pointer regardless of + /// the function attribute "frame-pointer". + virtual bool keepFramePointer(const MachineFunction &MF) const { + return false; + } /// hasFP - Return true if the specified function should have a dedicated /// frame pointer register. For most targets this is true only if the function diff --git a/llvm/include/llvm/Support/CodeGen.h b/llvm/include/llvm/Support/CodeGen.h index ce3a62382f9..22e74167266 100644 --- a/llvm/include/llvm/Support/CodeGen.h +++ b/llvm/include/llvm/Support/CodeGen.h @@ -57,6 +57,11 @@ namespace llvm { }; } + // Specify effect of frame pointer elimination optimization. + namespace FramePointer { + enum FP {All, NonLeaf, None}; + } + } // end llvm namespace #endif |
