Fix problem in DEBUG code. I could be pointing past the end and
dereferencing it causes an assertion error.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11458 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/FloatingPoint.cpp b/lib/Target/X86/FloatingPoint.cpp
index 28517c3..5755682 100644
--- a/lib/Target/X86/FloatingPoint.cpp
+++ b/lib/Target/X86/FloatingPoint.cpp
@@ -245,20 +245,20 @@
}
// Print out all of the instructions expanded to if -debug
- DEBUG(if (&*I == PrevMI) {
- std::cerr<< "Just deleted pseudo instruction\n";
- } else {
- MachineBasicBlock::iterator Start = I;
- // Rewind to first instruction newly inserted.
- while (Start != BB.begin() &&
- --Start != MachineBasicBlock::iterator(PrevMI));
- ++Start;
- std::cerr << "Inserted instructions:\n\t";
- Start->print(std::cerr, MF.getTarget());
- while (++Start != I); ++Start;
- }
- dumpStack();
- );
+ DEBUG(
+ MachineBasicBlock::iterator PrevI(PrevMI);
+ if (I == PrevI) {
+ std::cerr<< "Just deleted pseudo instruction\n";
+ } else {
+ MachineBasicBlock::iterator Start = I;
+ // Rewind to first instruction newly inserted.
+ while (Start != BB.begin() && prior(Start) != PrevI) --Start;
+ std::cerr << "Inserted instructions:\n\t";
+ Start->print(std::cerr, MF.getTarget());
+ while (++Start != next(I));
+ }
+ dumpStack();
+ );
Changed = true;
}