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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-05-20 06:38:32 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-05-20 06:38:32 +0000 |
| commit | 8e86929e3ce3fe56295d2704b93bf14c709b311a (patch) | |
| tree | 724d2f52b31243fda72dd8ab5f10ba9b9297dd99 /lib/CodeGen/TwoAddressInstructionPass.cpp | |
| parent | 4991de8fe1e72230cf714378b96411f1b59f6b77 (diff) | |
| download | llvm-8e86929e3ce3fe56295d2704b93bf14c709b311a.tar.gz llvm-8e86929e3ce3fe56295d2704b93bf14c709b311a.tar.bz2 llvm-8e86929e3ce3fe56295d2704b93bf14c709b311a.tar.xz | |
Properly constrain register classes in 2-addr.
X86 has 2-addr instructions with different constraints on the tied def
and use operands. One is GR32, one is GR32_NOSP.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157149 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/TwoAddressInstructionPass.cpp')
| -rw-r--r-- | lib/CodeGen/TwoAddressInstructionPass.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp index 8164690e40..5218aa1f7a 100644 --- a/lib/CodeGen/TwoAddressInstructionPass.cpp +++ b/lib/CodeGen/TwoAddressInstructionPass.cpp @@ -1555,6 +1555,12 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) { MO.setIsKill(false); RemovedKillFlag = true; } + + // Make sure regA is a legal regclass for the SrcIdx operand. + if (TargetRegisterInfo::isVirtualRegister(regA) && + TargetRegisterInfo::isVirtualRegister(regB)) + MRI->constrainRegClass(regA, MRI->getRegClass(regB)); + MO.setReg(regA); if (isCopy) |