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| author | Manman Ren <mren@apple.com> | 2012-11-27 18:58:41 +0000 |
|---|---|---|
| committer | Manman Ren <mren@apple.com> | 2012-11-27 18:58:41 +0000 |
| commit | f89406ac7872dc59da1b094383600291827e669f (patch) | |
| tree | 7f12585680ce28128b25d774e6efba63515d6472 /llvm/lib | |
| parent | f1bc9e74317c471017c62dca1a5695e296b27074 (diff) | |
| download | bcm5719-llvm-f89406ac7872dc59da1b094383600291827e669f.tar.gz bcm5719-llvm-f89406ac7872dc59da1b094383600291827e669f.zip | |
CSE: allow PerformTrivialCoalescing to check copies across basic block
boundaries.
Given the following case:
BB0
%vreg1<def> = SUBrr %vreg0, %vreg7
%vreg2<def> = COPY %vreg7
BB1
%vreg10<def> = SUBrr %vreg0, %vreg2
We should be able to CSE between SUBrr in BB0 and SUBrr in BB1.
rdar://12462006
llvm-svn: 168717
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/MachineCSE.cpp | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/MachineCSE.cpp b/llvm/lib/CodeGen/MachineCSE.cpp index dbc41defeb5..56cea4e599c 100644 --- a/llvm/lib/CodeGen/MachineCSE.cpp +++ b/llvm/lib/CodeGen/MachineCSE.cpp @@ -126,8 +126,6 @@ bool MachineCSE::PerformTrivialCoalescing(MachineInstr *MI, // deleted. continue; MachineInstr *DefMI = MRI->getVRegDef(Reg); - if (DefMI->getParent() != MBB) - continue; if (!DefMI->isCopy()) continue; unsigned SrcReg = DefMI->getOperand(1).getReg(); |
