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| author | Nadav Rotem <nrotem@apple.com> | 2012-08-13 18:52:44 +0000 |
|---|---|---|
| committer | Nadav Rotem <nrotem@apple.com> | 2012-08-13 18:52:44 +0000 |
| commit | 3a94c545cfd0ae883d5017f0484fb0bb70303c63 (patch) | |
| tree | 8ebfe2297664df905b60011c9dab6f99e05cd7bc /llvm/lib/Target/ARM/ARMISelLowering.cpp | |
| parent | 45b673dad5042c7de1142183a21e3ea5b2f31497 (diff) | |
| download | bcm5719-llvm-3a94c545cfd0ae883d5017f0484fb0bb70303c63.tar.gz bcm5719-llvm-3a94c545cfd0ae883d5017f0484fb0bb70303c63.zip | |
Do not optimize (or (and X,Y), Z) into BFI and other sequences if the AND ISDNode has more than one user.
rdar://11876519
llvm-svn: 161775
Diffstat (limited to 'llvm/lib/Target/ARM/ARMISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMISelLowering.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp index 52bdd528870..c66618a8ef5 100644 --- a/llvm/lib/Target/ARM/ARMISelLowering.cpp +++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp @@ -7422,8 +7422,12 @@ static SDValue PerformORCombine(SDNode *N, return COR; } + + // The code below optimizes (or (and X, Y), Z). + // The AND operand needs to have a single user to make these optimizations + // profitable. SDValue N0 = N->getOperand(0); - if (N0.getOpcode() != ISD::AND) + if (N0.getOpcode() != ISD::AND || !N0.hasOneUse()) return SDValue(); SDValue N1 = N->getOperand(1); |
