[FuzzMutate] Inst deleter doesn't work with PhiNodes
Differential Revision: https://reviews.llvm.org/D42412
llvm-svn: 323409
diff --git a/llvm/lib/FuzzMutate/IRMutator.cpp b/llvm/lib/FuzzMutate/IRMutator.cpp
index 00b558a..2dc7dfb 100644
--- a/llvm/lib/FuzzMutate/IRMutator.cpp
+++ b/llvm/lib/FuzzMutate/IRMutator.cpp
@@ -152,10 +152,14 @@
void InstDeleterIRStrategy::mutate(Function &F, RandomIRBuilder &IB) {
auto RS = makeSampler<Instruction *>(IB.Rand);
- // Avoid terminators so we don't have to worry about keeping the CFG coherent.
- for (Instruction &Inst : instructions(F))
- if (!Inst.isTerminator())
- RS.sample(&Inst, /*Weight=*/1);
+ for (Instruction &Inst : instructions(F)) {
+ // TODO: We can't handle these instructions.
+ if (Inst.isTerminator() || Inst.isEHPad() ||
+ Inst.isSwiftError() || isa<PHINode>(Inst))
+ continue;
+
+ RS.sample(&Inst, /*Weight=*/1);
+ }
if (RS.isEmpty())
return;
@@ -191,4 +195,5 @@
RS.sample(IB.newSource(*BB, InstsBefore, {}, Pred), /*Weight=*/1);
Inst.replaceAllUsesWith(RS.getSelection());
+ Inst.eraseFromParent();
}