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| author | Michael Kuperstein <michael.m.kuperstein@intel.com> | 2015-08-12 11:27:26 +0000 |
|---|---|---|
| committer | Michael Kuperstein <michael.m.kuperstein@intel.com> | 2015-08-12 11:27:26 +0000 |
| commit | fe0d9bb6ebe5334c4efc31a48979c5f39597f323 (patch) | |
| tree | 02387649fa08ebbbf95ed558615c2f4f6655d5d1 /llvm/lib | |
| parent | 94f2bb55351621fee2d7caa8a5233e564e3a58ff (diff) | |
| download | bcm5719-llvm-fe0d9bb6ebe5334c4efc31a48979c5f39597f323.tar.gz bcm5719-llvm-fe0d9bb6ebe5334c4efc31a48979c5f39597f323.zip | |
[X86] Disable mul -> shl + lea combine when compiling for minsize
Differential Revision: http://reviews.llvm.org/D11904
llvm-svn: 244740
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 4da5851fc06..986646a404c 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -23436,6 +23436,10 @@ static SDValue PerformCMOVCombine(SDNode *N, SelectionDAG &DAG, /// LEA + SHL, LEA + LEA. static SDValue PerformMulCombine(SDNode *N, SelectionDAG &DAG, TargetLowering::DAGCombinerInfo &DCI) { + // An imul is usually smaller than the alternative sequence. + if (DAG.getMachineFunction().getFunction()->optForMinSize()) + return SDValue(); + if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer()) return SDValue(); |
