forked from OSchip/llvm-project
104 lines
2.8 KiB
C++
104 lines
2.8 KiB
C++
//===-- AMDGPUAnnotateUniformValues.cpp - ---------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
/// \file
|
|
/// This pass adds amdgpu.uniform metadata to IR values so this information
|
|
/// can be used during instruction selection.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "AMDGPU.h"
|
|
#include "AMDGPUIntrinsicInfo.h"
|
|
#include "llvm/Analysis/DivergenceAnalysis.h"
|
|
#include "llvm/IR/InstVisitor.h"
|
|
#include "llvm/IR/IRBuilder.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
|
|
#define DEBUG_TYPE "amdgpu-annotate-uniform"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
|
|
class AMDGPUAnnotateUniformValues : public FunctionPass,
|
|
public InstVisitor<AMDGPUAnnotateUniformValues> {
|
|
DivergenceAnalysis *DA;
|
|
|
|
public:
|
|
static char ID;
|
|
AMDGPUAnnotateUniformValues() :
|
|
FunctionPass(ID) { }
|
|
bool doInitialization(Module &M) override;
|
|
bool runOnFunction(Function &F) override;
|
|
const char *getPassName() const override { return "AMDGPU Annotate Uniform Values"; }
|
|
void getAnalysisUsage(AnalysisUsage &AU) const override {
|
|
AU.addRequired<DivergenceAnalysis>();
|
|
AU.setPreservesAll();
|
|
}
|
|
|
|
void visitBranchInst(BranchInst &I);
|
|
void visitLoadInst(LoadInst &I);
|
|
|
|
};
|
|
|
|
} // End anonymous namespace
|
|
|
|
INITIALIZE_PASS_BEGIN(AMDGPUAnnotateUniformValues, DEBUG_TYPE,
|
|
"Add AMDGPU uniform metadata", false, false)
|
|
INITIALIZE_PASS_DEPENDENCY(DivergenceAnalysis)
|
|
INITIALIZE_PASS_END(AMDGPUAnnotateUniformValues, DEBUG_TYPE,
|
|
"Add AMDGPU uniform metadata", false, false)
|
|
|
|
char AMDGPUAnnotateUniformValues::ID = 0;
|
|
|
|
static void setUniformMetadata(Instruction *I) {
|
|
I->setMetadata("amdgpu.uniform", MDNode::get(I->getContext(), {}));
|
|
}
|
|
|
|
void AMDGPUAnnotateUniformValues::visitBranchInst(BranchInst &I) {
|
|
if (I.isUnconditional())
|
|
return;
|
|
|
|
Value *Cond = I.getCondition();
|
|
if (!DA->isUniform(Cond))
|
|
return;
|
|
|
|
setUniformMetadata(I.getParent()->getTerminator());
|
|
}
|
|
|
|
void AMDGPUAnnotateUniformValues::visitLoadInst(LoadInst &I) {
|
|
Value *Ptr = I.getPointerOperand();
|
|
if (!DA->isUniform(Ptr))
|
|
return;
|
|
|
|
if (Instruction *PtrI = dyn_cast<Instruction>(Ptr))
|
|
setUniformMetadata(PtrI);
|
|
|
|
}
|
|
|
|
bool AMDGPUAnnotateUniformValues::doInitialization(Module &M) {
|
|
return false;
|
|
}
|
|
|
|
bool AMDGPUAnnotateUniformValues::runOnFunction(Function &F) {
|
|
if (skipFunction(F))
|
|
return false;
|
|
|
|
DA = &getAnalysis<DivergenceAnalysis>();
|
|
visit(F);
|
|
|
|
return true;
|
|
}
|
|
|
|
FunctionPass *
|
|
llvm::createAMDGPUAnnotateUniformValues() {
|
|
return new AMDGPUAnnotateUniformValues();
|
|
}
|