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dbg_value may end a block.
author
Evan Cheng
<evan.cheng@apple.com>
Wed, 24 Mar 2010 01:50:28 +0000
(
01:50
+0000)
committer
Evan Cheng
<evan.cheng@apple.com>
Wed, 24 Mar 2010 01:50:28 +0000
(
01:50
+0000)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99378
91177308
-0d34-0410-b5e6-
96231b3b80d8
lib/CodeGen/MachineCSE.cpp
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diff --git
a/lib/CodeGen/MachineCSE.cpp
b/lib/CodeGen/MachineCSE.cpp
index
355acfc
..
fc9dea8
100644
(file)
--- a/
lib/CodeGen/MachineCSE.cpp
+++ b/
lib/CodeGen/MachineCSE.cpp
@@
-118,14
+118,14
@@
bool MachineCSE::isPhysDefTriviallyDead(unsigned Reg,
MachineBasicBlock::const_iterator E) {
unsigned LookAheadLeft = 5;
while (LookAheadLeft) {
+ // Skip over dbg_value's.
+ while (I != E && I->isDebugValue())
+ ++I;
+
if (I == E)
// Reached end of block, register is obviously dead.
return true;
- // Skip over dbg_value's.
- while (I->isDebugValue())
- ++I;
-
bool SeenDef = false;
for (unsigned i = 0, e = I->getNumOperands(); i != e; ++i) {
const MachineOperand &MO = I->getOperand(i);