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When doing remat, don't consider uses of non-allocatable physregs. Patch

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by Evan.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74370 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-06-27 04:06:41 +00:00
parent 9cb9e6778c
commit 1873d0c225
1 changed files with 4 additions and 0 deletions
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4
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -947,6 +947,10 @@ unsigned LiveIntervals::getReMatImplicitUse(const LiveInterval &li,
unsigned Reg = MO.getReg();
if (Reg == 0 || Reg == li.reg)
continue;
if (TargetRegisterInfo::isPhysicalRegister(Reg) &&
!allocatableRegs_[Reg])
continue;
// FIXME: For now, only remat MI with at most one register operand.
assert(!RegOp &&
"Can't rematerialize instruction with multiple register operand!");