RPCSX/llvm
1
0
Fork 0
mirror of https://github.com/RPCSX/llvm.git synced 2024-12-12 22:26:14 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Handle constants in phi nodes properly. This fixes test/Transforms/GVNPRE/2007-06-18-ConstantInPhi.ll

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37655 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2007-06-19 07:35:36 +00:00
parent 20c2b35c2f
commit d0954105f0
1 changed files with 10 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
lib/Transforms/Scalar/GVNPRE.cpp
View File

@ -927,7 +927,16 @@ bool GVNPRE::runOnFunction(Function &F) {
for (std::set<Value*>::iterator I = S.begin(), E = S.end();
I != E; ++I) {
if (find_leader(anticIn, VN.lookup(*I)) == 0)
// For non-opaque values, we should already have a value numbering.
// However, for opaques, such as constants within PHI nodes, it is
// possible that they have not yet received a number. Make sure they do
// so now.
uint32_t valNum = 0;
if (isa<BinaryOperator>(*I) || isa<CmpInst>(*I))
valNum = VN.lookup(*I);
else
valNum = VN.lookup_or_add(*I);
if (find_leader(anticIn, valNum) == 0)
val_insert(anticIn, *I);
}