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Don't sink the instruction if TargetRegisterInfo::isSafeToMoveRegClassDefs doesn...
author
Evan Cheng
<evan.cheng@apple.com>
Sat, 7 Feb 2009 01:21:47 +0000
(
01:21
+0000)
committer
Evan Cheng
<evan.cheng@apple.com>
Sat, 7 Feb 2009 01:21:47 +0000
(
01:21
+0000)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63994
91177308
-0d34-0410-b5e6-
96231b3b80d8
lib/CodeGen/MachineSink.cpp
patch
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diff --git
a/lib/CodeGen/MachineSink.cpp
b/lib/CodeGen/MachineSink.cpp
index 87114396f9e5fcb8c8f12fa6327ee6a3fe7a685f..a85a41fbaee8d92c9bc1b3656f36d2a7aa86071b 100644
(file)
--- a/
lib/CodeGen/MachineSink.cpp
+++ b/
lib/CodeGen/MachineSink.cpp
@@
-167,6
+167,10
@@
bool MachineSinking::SinkInstruction(MachineInstr *MI, bool &SawStore) {
} else {
// Virtual register uses are always safe to sink.
if (MO.isUse()) continue;
+
+ // If it's not safe to move defs of the register class, then abort.
+ if (!TII->isSafeToMoveRegClassDefs(RegInfo->getRegClass(Reg)))
+ return false;
// FIXME: This picks a successor to sink into based on having one
// successor that dominates all the uses. However, there are cases where