diff options
Diffstat (limited to 'lib/Target/X86/X86InstrInfo.td')
| -rw-r--r-- | lib/Target/X86/X86InstrInfo.td | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td index bb90f29b0c..c4db588290 100644 --- a/lib/Target/X86/X86InstrInfo.td +++ b/lib/Target/X86/X86InstrInfo.td @@ -2774,6 +2774,16 @@ def : Pat<(i32 (and (loadi32 addr:$src), (i32 65535))),(MOVZX32rm16 addr:$src)>; // r & (2^16-1) ==> movz def : Pat<(and GR32:$src1, 0xffff), (MOVZX32rr16 (i16 (EXTRACT_SUBREG GR32:$src1, x86_subreg_16bit)))>; +// r & (2^8-1) ==> movz +def : Pat<(and GR32:$src1, 0xff), + (MOVZX32rr8 (i8 (EXTRACT_SUBREG (MOV32to32_ GR32:$src1), + x86_subreg_8bit)))>, + Requires<[In32BitMode]>; +// r & (2^8-1) ==> movz +def : Pat<(and GR16:$src1, 0xff), + (MOVZX16rr8 (i8 (EXTRACT_SUBREG (MOV16to16_ GR16:$src1), + x86_subreg_8bit)))>, + Requires<[In32BitMode]>; // (shl x, 1) ==> (add x, x) def : Pat<(shl GR8 :$src1, (i8 1)), (ADD8rr GR8 :$src1, GR8 :$src1)>; |