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| author | Cameron Zwarich <zwarich@apple.com> | 2011-05-20 23:25:36 +0000 |
|---|---|---|
| committer | Cameron Zwarich <zwarich@apple.com> | 2011-05-20 23:25:36 +0000 |
| commit | 345968c82d73d7b770a377d91ecea53c4672d48b (patch) | |
| tree | 070c87ebac8642e787adce25d018cd227031dac7 | |
| parent | 43299776d7cae9843b354b9fcc08186437516d68 (diff) | |
| download | external_llvm-345968c82d73d7b770a377d91ecea53c4672d48b.zip external_llvm-345968c82d73d7b770a377d91ecea53c4672d48b.tar.gz external_llvm-345968c82d73d7b770a377d91ecea53c4672d48b.tar.bz2 | |
Fix PR9962 by properly constraining register classes in RemoveCopyByCommutingDef(). This
actually fixes most of the VerifyCoalescing failures in test-suite.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131768 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/SimpleRegisterCoalescing.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp index c33ce24..2118489 100644 --- a/lib/CodeGen/SimpleRegisterCoalescing.cpp +++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp @@ -430,6 +430,10 @@ bool SimpleRegisterCoalescing::RemoveCopyByCommutingDef(const CoalescerPair &CP, MachineInstr *NewMI = tii_->commuteInstruction(DefMI); if (!NewMI) return false; + if (TargetRegisterInfo::isVirtualRegister(IntA.reg) && + TargetRegisterInfo::isVirtualRegister(IntB.reg) && + !mri_->constrainRegClass(IntB.reg, mri_->getRegClass(IntA.reg))) + return false; if (NewMI != DefMI) { li_->ReplaceMachineInstrInMaps(DefMI, NewMI); MBB->insert(DefMI, NewMI); |