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author | Evan Cheng <evan.cheng@apple.com> | 2010-01-07 00:54:06 +0000 |
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committer | Evan Cheng <evan.cheng@apple.com> | 2010-01-07 00:54:06 +0000 |
commit | 17751dac3e0a7b7a8cdf9bd612ce20f157eb251f (patch) | |
tree | 9e9dba3cf9cd9e1598aff628c3e58bf39cce0726 /lib | |
parent | ad6b6da8aafa88fa3bd002f2595121e1227c4b93 (diff) | |
download | llvm-17751dac3e0a7b7a8cdf9bd612ce20f157eb251f.tar.gz llvm-17751dac3e0a7b7a8cdf9bd612ce20f157eb251f.tar.bz2 llvm-17751dac3e0a7b7a8cdf9bd612ce20f157eb251f.tar.xz |
Fix a minor regression from my dag combiner changes. One more place which needs to look pass truncates.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92885 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
-rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 7d92fd8fad..212478c58a 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -5611,13 +5611,21 @@ SDValue X86TargetLowering::EmitTest(SDValue Op, unsigned X86CC, // because a TEST instruction will be better. bool NonFlagUse = false; for (SDNode::use_iterator UI = Op.getNode()->use_begin(), - UE = Op.getNode()->use_end(); UI != UE; ++UI) - if (UI->getOpcode() != ISD::BRCOND && - (UI->getOpcode() != ISD::SELECT || UI.getOperandNo() != 0) && - UI->getOpcode() != ISD::SETCC) { + UE = Op.getNode()->use_end(); UI != UE; ++UI) { + SDNode *User = *UI; + unsigned UOpNo = UI.getOperandNo(); + if (User->getOpcode() == ISD::TRUNCATE && User->hasOneUse()) { + // Look pass truncate. + UOpNo = User->use_begin().getOperandNo(); + User = *User->use_begin(); + } + if (User->getOpcode() != ISD::BRCOND && + User->getOpcode() != ISD::SETCC && + (User->getOpcode() != ISD::SELECT || UOpNo != 0)) { NonFlagUse = true; break; } + } if (!NonFlagUse) break; } |