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[SYCL][NFC] Optimize SpecConstantPass #2610

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Merged
merged 1 commit into from
Oct 8, 2020
Merged

[SYCL][NFC] Optimize SpecConstantPass #2610

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22 changes: 11 additions & 11 deletions llvm/tools/sycl-post-link/SpecConstants.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -183,27 +183,27 @@ PreservedAnalyses SpecConstantsPass::run(Module &M,
int NextID = 0;
StringMap<unsigned> IDMap;

// Iterate through all calls to
// Iterate through all declarations of instances of function template
// template <typename T> T __sycl_getSpecConstantValue(const char *ID)
// intrinsic and lower them depending on the SetValAtRT setting (see below).
// intrinsic to find its calls and lower them depending on the SetValAtRT
// setting (see below).
bool IRModified = false;

for (Function &F : M) {
if (F.isDeclaration())
if (!F.isDeclaration())
continue;
SmallVector<CallInst *, 32> SCIntrCalls;

for (Instruction &I : instructions(F)) {
auto *CI = dyn_cast<CallInst>(&I);
Function *Callee = nullptr;
if (!CI || CI->isIndirectCall() || !(Callee = CI->getCalledFunction()))
continue;
StringRef Name = Callee->getName();
if (!F.getName().startswith(SYCL_GET_SPEC_CONST_VAL))
continue;

if (!Name.startswith(SYCL_GET_SPEC_CONST_VAL))
SmallVector<CallInst *, 32> SCIntrCalls;
for (auto *U : F.users()) {
auto *CI = dyn_cast<CallInst>(U);
if (!CI)
continue;
SCIntrCalls.push_back(CI);
}

IRModified = IRModified || (SCIntrCalls.size() > 0);

for (auto *CI : SCIntrCalls) {
Expand Down