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[PGO] Create the profile data variable before the lowering 

This patch creates the profile data variable before lowering the profile intrinsics.

Reviewers: davidxl, silvas

Differential Revision: http://reviews.llvm.org/D16015

llvm-svn: 258156
This commit is contained in:
Rong Xu 2016-01-19 18:29:54 +00:00
parent 1ec08ac7e4
commit 294572f116
1 changed files with 12 additions and 3 deletions
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15
llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
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@ -137,11 +137,20 @@ bool InstrProfiling::runOnModule(Module &M) {
// We did not know how many value sites there would be inside
// the instrumented function. This is counting the number of instrumented
// target value sites to enter it as field in the profile data variable.
for (Function &F : M)
for (Function &F : M) {
InstrProfIncrementInst *FirstProfIncInst = nullptr;
for (BasicBlock &BB : F)
for (auto I = BB.begin(), E = BB.end(); I != E;)
if (auto *Ind = dyn_cast<InstrProfValueProfileInst>(I++))
for (auto I = BB.begin(), E = BB.end(); I != E; I++)
if (auto *Ind = dyn_cast<InstrProfValueProfileInst>(I))
computeNumValueSiteCounts(Ind);
else if (FirstProfIncInst == nullptr)
FirstProfIncInst = dyn_cast<InstrProfIncrementInst>(I);
// Value profiling intrinsic lowering requires per-function profile data
// variable to be created first.
if (FirstProfIncInst != nullptr)
static_cast<void>(getOrCreateRegionCounters(FirstProfIncInst));
}
for (Function &F : M)
for (BasicBlock &BB : F)