[BPI] Replace weights by probabilities in BPI.
This patch removes all weight-related interfaces from BPI and replace
them by probability versions. With this patch, we won't use edge weight
anymore in either IR or MC passes. Edge probabilitiy is a better
representation in terms of CFG update and validation.
Differential revision: http://reviews.llvm.org/D15519
llvm-svn: 256263
diff --git a/llvm/lib/CodeGen/StackProtector.cpp b/llvm/lib/CodeGen/StackProtector.cpp
index ee1a204..db3fef5 100644
--- a/llvm/lib/CodeGen/StackProtector.cpp
+++ b/llvm/lib/CodeGen/StackProtector.cpp
@@ -453,12 +453,13 @@
LoadInst *LI1 = B.CreateLoad(StackGuardVar);
LoadInst *LI2 = B.CreateLoad(AI);
Value *Cmp = B.CreateICmpEQ(LI1, LI2);
- unsigned SuccessWeight =
- BranchProbabilityInfo::getBranchWeightStackProtector(true);
- unsigned FailureWeight =
- BranchProbabilityInfo::getBranchWeightStackProtector(false);
+ auto SuccessProb =
+ BranchProbabilityInfo::getBranchProbStackProtector(true);
+ auto FailureProb =
+ BranchProbabilityInfo::getBranchProbStackProtector(false);
MDNode *Weights = MDBuilder(F->getContext())
- .createBranchWeights(SuccessWeight, FailureWeight);
+ .createBranchWeights(SuccessProb.getNumerator(),
+ FailureProb.getNumerator());
B.CreateCondBr(Cmp, NewBB, FailBB, Weights);
}
}