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Fix comment /NFC

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@317514 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Xinliang David Li 2017-11-06 21:57:51 +00:00
parent 4cbab70b62
commit cebfaaf903
1 changed files with 4 additions and 3 deletions
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7
lib/Transforms/Scalar/JumpThreading.cpp
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@ -192,11 +192,12 @@ JumpThreadingPass::JumpThreadingPass(int T) {
// P(cond == true ) = P(A) + P(cond == true | B) * P(B)
//
// which gives us:
// P(A) <= P(c == true), i.e.
// P(A) is less than P(cond == true), i.e.
// P(t == true) <= P(cond == true)
//
// In other words, if we know P(cond == true), we know that P(t == true)
// can not be greater than 1%.
// In other words, if we know P(cond == true) is unlikely, we know
// that P(t == true) is also unlikely.
//
static void updatePredecessorProfileMetadata(PHINode *PN, BasicBlock *BB) {
BranchInst *CondBr = dyn_cast<BranchInst>(BB->getTerminator());
if (!CondBr)