mirrors/llvm-project
0
0
Fork 0
mirror of https://github.com/llvm/llvm-project.git synced 2025-04-24 06:26:07 +00:00
Code Issues Projects Releases Wiki Activity

[DFSan] Change placeholders from undef to poison (#131534)

Browse Source 
Use `poison` to create dummy phi nodes instead of `undef`.
This commit is contained in:
Pedro Lobo 2025-03-17 22:16:47 +00:00 committed by GitHub
parent ccf2109471
commit 1b31646757
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
llvm/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
View File

@ -3447,9 +3447,9 @@ void DFSanVisitor::visitPHINode(PHINode &PN) {
PN.getIterator());
// Give the shadow phi node valid predecessors to fool SplitEdge into working.
Value *UndefShadow = UndefValue::get(ShadowTy);
Value *PoisonShadow = PoisonValue::get(ShadowTy);
for (BasicBlock *BB : PN.blocks())
ShadowPN->addIncoming(UndefShadow, BB);
ShadowPN->addIncoming(PoisonShadow, BB);
DFSF.setShadow(&PN, ShadowPN);
@ -3457,9 +3457,9 @@ void DFSanVisitor::visitPHINode(PHINode &PN) {
if (DFSF.DFS.shouldTrackOrigins()) {
OriginPN = PHINode::Create(DFSF.DFS.OriginTy, PN.getNumIncomingValues(), "",
PN.getIterator());
Value *UndefOrigin = UndefValue::get(DFSF.DFS.OriginTy);
Value *PoisonOrigin = PoisonValue::get(DFSF.DFS.OriginTy);
for (BasicBlock *BB : PN.blocks())
OriginPN->addIncoming(UndefOrigin, BB);
OriginPN->addIncoming(PoisonOrigin, BB);
DFSF.setOrigin(&PN, OriginPN);
}