diff options
Diffstat (limited to 'lib/Target/X86/X86InstrInfo.td')
| -rw-r--r-- | lib/Target/X86/X86InstrInfo.td | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td index 9649c23..f4a57be 100644 --- a/lib/Target/X86/X86InstrInfo.td +++ b/lib/Target/X86/X86InstrInfo.td @@ -3612,6 +3612,17 @@ def : Pat<(parallel (X86smul_ovf (load addr:$src1), i32immSExt8:$src2), (implicit EFLAGS)), (IMUL32rmi8 addr:$src1, i32immSExt8:$src2)>; +// Optimize multiple with overflow by 2. +let AddedComplexity = 2 in { +def : Pat<(parallel (X86smul_ovf GR16:$src1, 2), + (implicit EFLAGS)), + (ADD16rr GR16:$src1, GR16:$src1)>; + +def : Pat<(parallel (X86smul_ovf GR32:$src1, 2), + (implicit EFLAGS)), + (ADD32rr GR32:$src1, GR32:$src1)>; +} + //===----------------------------------------------------------------------===// // Floating Point Stack Support //===----------------------------------------------------------------------===// |