Try for the third time to teach getFirstTerminator() about debug values.
This time let's rephrase to trick gcc-4.3 into not miscompiling.
llvm-svn: 123432
diff --git a/llvm/lib/CodeGen/PHIElimination.cpp b/llvm/lib/CodeGen/PHIElimination.cpp
index 923fa21..b940e26 100644
--- a/llvm/lib/CodeGen/PHIElimination.cpp
+++ b/llvm/lib/CodeGen/PHIElimination.cpp
@@ -339,6 +339,8 @@
#ifndef NDEBUG
for (MachineBasicBlock::iterator TI = llvm::next(Term);
TI != opBlock.end(); ++TI) {
+ if (TI->isDebugValue())
+ continue;
assert(!TI->readsRegister(SrcReg) &&
"Terminator instructions cannot use virtual registers unless"
"they are the first terminator in a block!");
@@ -347,9 +349,13 @@
} else if (reusedIncoming || !IncomingReg) {
// We may have to rewind a bit if we didn't insert a copy this time.
KillInst = Term;
- while (KillInst != opBlock.begin())
- if ((--KillInst)->readsRegister(SrcReg))
+ while (KillInst != opBlock.begin()) {
+ --KillInst;
+ if (KillInst->isDebugValue())
+ continue;
+ if (KillInst->readsRegister(SrcReg))
break;
+ }
} else {
// We just inserted this copy.
KillInst = prior(InsertPos);