RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-23 03:02:36 +01:00
Code Issues Projects Releases Wiki Activity

Makes promoteIndirectCall an external function.

Browse Source 
Summary: promoteIndirectCall should be a utility function that could be invoked by other optimization passes.

Reviewers: davidxl

Reviewed By: davidxl

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D29051

llvm-svn: 292850
This commit is contained in:
Dehao Chen 2017-01-23 23:18:24 +00:00
parent 268960185f
commit 9e02f996da
2 changed files with 21 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
include/llvm/Transforms/Instrumentation.h
View File

@ -88,6 +88,20 @@ ModulePass *
createPGOInstrumentationUseLegacyPass(StringRef Filename = StringRef(""));
ModulePass *createPGOIndirectCallPromotionLegacyPass(bool InLTO = false);
// Helper function that transforms Inst (either an indirect-call instruction, or
// an invoke instruction , to a conditional call to F. This is like:
// if (Inst.CalledValue == F)
// F(...);
// else
// Inst(...);
// end
// TotalCount is the profile count value that the instruction executes.
// Count is the profile count value that F is the target function.
// These two values are used to update the branch weight.
// Returns the promoted direct call instruction.
Instruction *promoteIndirectCall(Instruction *Inst, Function *F, uint64_t Count,
uint64_t TotalCount);
/// Options for the frontend instrumentation based profiling pass.
struct InstrProfOptions {
// Add the 'noredzone' attribute to added runtime library calls.

24
lib/Transforms/Instrumentation/IndirectCallPromotion.cpp
View File

@ -172,19 +172,6 @@ private:
Instruction *Inst, const ArrayRef<InstrProfValueData> &ValueDataRef,
uint64_t TotalCount, uint32_t NumCandidates);
// Main function that transforms Inst (either a indirect-call instruction, or
// an invoke instruction , to a conditional call to F. This is like:
// if (Inst.CalledValue == F)
// F(...);
// else
// Inst(...);
// end
// TotalCount is the profile count value that the instruction executes.
// Count is the profile count value that F is the target function.
// These two values are being used to update the branch weight.
void promote(Instruction *Inst, Function *F, uint64_t Count,
uint64_t TotalCount);
// Promote a list of targets for one indirect-call callsite. Return
// the number of promotions.
uint32_t tryToPromote(Instruction *Inst,
@ -532,8 +519,10 @@ static void insertCallRetPHI(Instruction *Inst, Instruction *CallResult,
// Ret = phi(Ret1, Ret2);
// It adds type casts for the args do not match the parameters and the return
// value. Branch weights metadata also updated.
void ICallPromotionFunc::promote(Instruction *Inst, Function *DirectCallee,
uint64_t Count, uint64_t TotalCount) {
// Returns the promoted direct call instruction.
Instruction *llvm::promoteIndirectCall(Instruction *Inst,
Function *DirectCallee, uint64_t Count,
uint64_t TotalCount) {
assert(DirectCallee != nullptr);
BasicBlock *BB = Inst->getParent();
// Just to suppress the non-debug build warning.
@ -576,9 +565,10 @@ void ICallPromotionFunc::promote(Instruction *Inst, Function *DirectCallee,
DEBUG(dbgs() << *BB << *DirectCallBB << *IndirectCallBB << *MergeBB << "\n");
emitOptimizationRemark(
F.getContext(), "pgo-icall-prom", F, Inst->getDebugLoc(),
BB->getContext(), "pgo-icall-prom", *BB->getParent(), Inst->getDebugLoc(),
Twine("Promote indirect call to ") + DirectCallee->getName() +
" with count " + Twine(Count) + " out of " + Twine(TotalCount));
return NewInst;
}
// Promote indirect-call to conditional direct-call for one callsite.
@ -589,7 +579,7 @@ uint32_t ICallPromotionFunc::tryToPromote(
for (auto &C : Candidates) {
uint64_t Count = C.Count;
promote(Inst, C.TargetFunction, Count, TotalCount);
promoteIndirectCall(Inst, C.TargetFunction, Count, TotalCount);
assert(TotalCount >= Count);
TotalCount -= Count;
NumOfPGOICallPromotion++;