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c17da7166d
This is in preparation to making changes needed to stop resetting NoFramePointerElim in resetTargetOptions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238079 91177308-0d34-0410-b5e6-96231b3b80d8
74 lines
2.8 KiB
C++
74 lines
2.8 KiB
C++
//===-- TargetOptionsImpl.cpp - Options that apply to all targets ----------==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the methods in the TargetOptions.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/Function.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/Target/TargetOptions.h"
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using namespace llvm;
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/// DisableFramePointerElim - This returns true if frame pointer elimination
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/// optimization should be disabled for the given machine function.
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bool TargetOptions::DisableFramePointerElim(const MachineFunction &MF) const {
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// Check to see if we should eliminate non-leaf frame pointers and then
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// check to see if we should eliminate all frame pointers.
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if (MF.getFunction()->hasFnAttribute("no-frame-pointer-elim-non-leaf") &&
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!NoFramePointerElim) {
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const MachineFrameInfo *MFI = MF.getFrameInfo();
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return MFI->hasCalls();
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}
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return NoFramePointerElim;
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}
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/// LessPreciseFPMAD - This flag return true when -enable-fp-mad option
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/// is specified on the command line. When this flag is off(default), the
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/// code generator is not allowed to generate mad (multiply add) if the
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/// result is "less precise" than doing those operations individually.
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bool TargetOptions::LessPreciseFPMAD() const {
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return UnsafeFPMath || LessPreciseFPMADOption;
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}
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/// HonorSignDependentRoundingFPMath - Return true if the codegen must assume
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/// that the rounding mode of the FPU can change from its default.
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bool TargetOptions::HonorSignDependentRoundingFPMath() const {
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return !UnsafeFPMath && HonorSignDependentRoundingFPMathOption;
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}
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/// getTrapFunctionName - If this returns a non-empty string, this means isel
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/// should lower Intrinsic::trap to a call to the specified function name
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/// instead of an ISD::TRAP node.
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StringRef TargetOptions::getTrapFunctionName() const {
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return TrapFuncName;
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}
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void llvm::setFunctionAttributes(StringRef CPU, StringRef Features, Module &M) {
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for (auto &F : M) {
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auto &Ctx = F.getContext();
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AttributeSet Attrs = F.getAttributes(), NewAttrs;
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if (!CPU.empty())
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NewAttrs = NewAttrs.addAttribute(Ctx, AttributeSet::FunctionIndex,
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"target-cpu", CPU);
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if (!Features.empty())
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NewAttrs = NewAttrs.addAttribute(Ctx, AttributeSet::FunctionIndex,
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"target-features", Features);
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// Let NewAttrs override Attrs.
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NewAttrs = Attrs.addAttributes(Ctx, AttributeSet::FunctionIndex, NewAttrs);
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F.setAttributes(NewAttrs);
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}
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}
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