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| author | Craig Topper <craig.topper@intel.com> | 2017-07-31 05:55:54 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@intel.com> | 2017-07-31 05:55:54 +0000 |
| commit | 97e9fa795450235a2cc312e7c67e2589acc01ca8 (patch) | |
| tree | f176534f54930638c23e57214dd6c4c880b91545 /llvm/lib/Target | |
| parent | 5ca19556270f7d44cc2731be5d6c4fb6cc245f98 (diff) | |
| download | bcm5719-llvm-97e9fa795450235a2cc312e7c67e2589acc01ca8.tar.gz bcm5719-llvm-97e9fa795450235a2cc312e7c67e2589acc01ca8.zip | |
[X86] Add pattern to use bzhi for 64-bit 'and' with a mask when there is a load involved.
We already had a pattern without load, but with a load we were falling back to a regular 'and' due to pattern complexity priority.
llvm-svn: 309535
Diffstat (limited to 'llvm/lib/Target')
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrInfo.td | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86InstrInfo.td b/llvm/lib/Target/X86/X86InstrInfo.td index e3e8d2d613c..75638f24bfe 100644 --- a/llvm/lib/Target/X86/X86InstrInfo.td +++ b/llvm/lib/Target/X86/X86InstrInfo.td @@ -2361,6 +2361,10 @@ let Predicates = [HasBMI2] in { (BZHI64rr GR64:$src, (INSERT_SUBREG (i64 (IMPLICIT_DEF)), (MOV8ri (CountTrailingOnes imm:$mask)), sub_8bit))>; + def : Pat<(and (loadi64 addr:$src), BZHIMask:$mask), + (BZHI64rm addr:$src, + (INSERT_SUBREG (i64 (IMPLICIT_DEF)), + (MOV8ri (CountTrailingOnes imm:$mask)), sub_8bit))>; def : Pat<(and GR32:$src, (add (shl 1, GR8:$lz), -1)), (BZHI32rr GR32:$src, |
