From 6212f9a304d7f8061c87920d39bddbc19afecb0c Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Fri, 6 May 2011 19:31:19 +0000
Subject: Iterate backwards over debug locations when splitting them so they
can be safely erased.
This should unbreak dragonegg-i386-linux and build-self-4-mingw32.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131007 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/CodeGen/LiveDebugVariables.cpp | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
(limited to 'lib')
diff --git a/lib/CodeGen/LiveDebugVariables.cpp b/lib/CodeGen/LiveDebugVariables.cpp
index 41bf87f..783a7e1 100644
--- a/lib/CodeGen/LiveDebugVariables.cpp
+++ b/lib/CodeGen/LiveDebugVariables.cpp
@@ -795,7 +795,10 @@ UserValue::splitLocation(unsigned OldLocNo, ArrayRef<LiveInterval*> NewRegs) {
bool
UserValue::splitRegister(unsigned OldReg, ArrayRef<LiveInterval*> NewRegs) {
bool DidChange = false;
- for (unsigned LocNo = 0, E = locations.size(); LocNo != E; ++LocNo) {
+ // Split locations referring to OldReg. Iterate backwards so splitLocation can
+ // safely erase unuused locations.
+ for (unsigned i = locations.size(); i ; --i) {
+ unsigned LocNo = i-1;
const MachineOperand *Loc = &locations[LocNo];
if (!Loc->isReg() || Loc->getReg() != OldReg)
continue;
--
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