AMDGPUAnnotateUniformValues.cpp Source File (original) (raw)

24#define DEBUG_TYPE "amdgpu-annotate-uniform"

26using namespace llvm;

28namespace {

30class AMDGPUAnnotateUniformValues

31 : public InstVisitor {

35 bool isEntryFunc;

36 bool Changed = false;

39 I->setMetadata("amdgpu.uniform", MDNode::get(I->getContext(), {}));

40 Changed = true;

41 }

44 I->setMetadata("amdgpu.noclobber", MDNode::get(I->getContext(), {}));

45 Changed = true;

46 }

48public:

51 : UA(&UA), MSSA(&MSSA), AA(&AA),

57 bool changed() const { return Changed; }

58};

60}

62void AMDGPUAnnotateUniformValues::visitBranchInst(BranchInst &I) {

63 if (UA->isUniform(&I))

64 setUniformMetadata(&I);

65}

67void AMDGPUAnnotateUniformValues::visitLoadInst(LoadInst &I) {

68 Value *Ptr = I.getPointerOperand();

69 if (!UA->isUniform(Ptr))

70 return;

72 if (PtrI)

73 setUniformMetadata(PtrI);

78 if (!isEntryFunc)

79 return;

82 setNoClobberMetadata(&I);

83}

92 AMDGPUAnnotateUniformValues Impl(UI, MSSA, AA, F);

93 Impl.visit(F);

95 if (!Impl.changed())

101 return PA;

102}

103

105public:

107

109

111

114 return "AMDGPU Annotate Uniform Values";

115 }

116

122 }

123};

124

126 if (skipFunction(F))

127 return false;

128

130 getAnalysis().getUniformityInfo();

131 MemorySSA &MSSA = getAnalysis().getMSSA();

132 AliasAnalysis &AA = getAnalysis().getAAResults();

133

134 AMDGPUAnnotateUniformValues Impl(UI, MSSA, AA, F);

135 Impl.visit(F);

136 return Impl.changed();

137}

138

140 "Add AMDGPU uniform metadata", false, false)

146

148

151}

Add AMDGPU uniform metadata

static bool runOnFunction(Function &F, bool PostInlining)

This file exposes an interface to building/using memory SSA to walk memory instructions using a use/d...

FunctionAnalysisManager FAM

#define INITIALIZE_PASS_DEPENDENCY(depName)

#define INITIALIZE_PASS_END(passName, arg, name, cfg, analysis)

#define INITIALIZE_PASS_BEGIN(passName, arg, name, cfg, analysis)

LLVM IR instance of the generic uniformity analysis.

void getAnalysisUsage(AnalysisUsage &AU) const override

getAnalysisUsage - This function should be overriden by passes that need analysis information to do t...

bool runOnFunction(Function &F) override

runOnFunction - Virtual method overriden by subclasses to do the per-function processing of the pass.

StringRef getPassName() const override

getPassName - Return a nice clean name for a pass.

bool doInitialization(Module &M) override

doInitialization - Virtual method overridden by subclasses to do any necessary initialization before ...

AMDGPUAnnotateUniformValuesLegacy()

A manager for alias analyses.

A wrapper pass to provide the legacy pass manager access to a suitably prepared AAResults object.

PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM)

A container for analyses that lazily runs them and caches their results.

PassT::Result & getResult(IRUnitT &IR, ExtraArgTs... ExtraArgs)

Get the result of an analysis pass for a given IR unit.

Represent the analysis usage information of a pass.

AnalysisUsage & addRequired()

void setPreservesAll()

Set by analyses that do not transform their input at all.

Conditional or Unconditional Branch instruction.

Represents analyses that only rely on functions' control flow.

FunctionPass class - This class is used to implement most global optimizations.

Base class for instruction visitors.

RetTy visitBranchInst(BranchInst &I)

RetTy visitLoadInst(LoadInst &I)

An instruction for reading from memory.

static MDTuple * get(LLVMContext &Context, ArrayRef< Metadata * > MDs)

An analysis that produces MemorySSA for a function.

Legacy analysis pass which computes MemorySSA.

Encapsulates MemorySSA, including all data associated with memory accesses.

A Module instance is used to store all the information related to an LLVM module.

A set of analyses that are preserved following a run of a transformation pass.

static PreservedAnalyses none()

Convenience factory function for the empty preserved set.

static PreservedAnalyses all()

Construct a special preserved set that preserves all passes.

void preserveSet()

Mark an analysis set as preserved.

StringRef - Represent a constant reference to a string, i.e.

Analysis pass which computes UniformityInfo.

Legacy analysis pass which computes a CycleInfo.

LLVM Value Representation.

@ GLOBAL_ADDRESS

Address space for global memory (RAT0, VTX0).

bool isEntryFunctionCC(CallingConv::ID CC)

bool isClobberedInFunction(const LoadInst *Load, MemorySSA *MSSA, AAResults *AA)

Check is a Load is clobbered in its function.

This is an optimization pass for GlobalISel generic memory operations.

FunctionPass * createAMDGPUAnnotateUniformValuesLegacy()

T uniform(GenT &Gen, T Min, T Max)

Return a uniformly distributed random value between Min and Max.