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Don't update physical register def.
author
Evan Cheng
<evan.cheng@apple.com>
Sat, 6 Mar 2010 01:14:19 +0000
(
01:14
+0000)
committer
Evan Cheng
<evan.cheng@apple.com>
Sat, 6 Mar 2010 01:14:19 +0000
(
01:14
+0000)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97861
91177308
-0d34-0410-b5e6-
96231b3b80d8
lib/CodeGen/MachineCSE.cpp
patch
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diff --git
a/lib/CodeGen/MachineCSE.cpp
b/lib/CodeGen/MachineCSE.cpp
index af35a7a3bb3ee2809c535eeeca25bb0d00d1f82b..b376e3d05fee9257a96b1eee9c4638f85ff1e393 100644
(file)
--- a/
lib/CodeGen/MachineCSE.cpp
+++ b/
lib/CodeGen/MachineCSE.cpp
@@
-238,8
+238,9
@@
bool MachineCSE::ProcessBlock(MachineDomTreeNode *Node) {
continue;
unsigned OldReg = MO.getReg();
unsigned NewReg = CSMI->getOperand(i).getReg();
- assert(OldReg != NewReg &&
- TargetRegisterInfo::isVirtualRegister(OldReg) &&
+ if (OldReg == NewReg)
+ continue;
+ assert(TargetRegisterInfo::isVirtualRegister(OldReg) &&
TargetRegisterInfo::isVirtualRegister(NewReg) &&
"Do not CSE physical register defs!");
MRI->replaceRegWith(OldReg, NewReg);