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Mark livein registers as being in used.
author
Evan Cheng
<evan.cheng@apple.com>
Fri, 23 Feb 2007 08:41:19 +0000
(08:41 +0000)
committer
Evan Cheng
<evan.cheng@apple.com>
Fri, 23 Feb 2007 08:41:19 +0000
(08:41 +0000)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34525
91177308
-0d34-0410-b5e6-
96231b3b80d8
lib/CodeGen/RegisterScavenging.cpp
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diff --git
a/lib/CodeGen/RegisterScavenging.cpp
b/lib/CodeGen/RegisterScavenging.cpp
index
5aa2ca3
..
0938e3a
100644
(file)
--- a/
lib/CodeGen/RegisterScavenging.cpp
+++ b/
lib/CodeGen/RegisterScavenging.cpp
@@
-43,6
+43,12
@@
RegScavenger::RegScavenger(MachineBasicBlock *mbb)
if (CSRegs != NULL)
for (unsigned i = 0; CSRegs[i]; ++i)
CalleeSavedRegs.set(CSRegs[i]);
+
+ // Live-in registers are in use.
+ if (!MBB->livein_empty())
+ for (MachineBasicBlock::const_livein_iterator I = MBB->livein_begin(),
+ E = MBB->livein_end(); I != E; ++I)
+ setUsed(*I);
}
void RegScavenger::forward() {