diff options
Diffstat (limited to 'lib/Target/X86/X86InstrInfo.td')
| -rw-r--r-- | lib/Target/X86/X86InstrInfo.td | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td index e55edce..aa2fe09 100644 --- a/lib/Target/X86/X86InstrInfo.td +++ b/lib/Target/X86/X86InstrInfo.td @@ -2784,19 +2784,24 @@ def : Pat<(zextloadi32i1 addr:$src), (MOVZX32rm8 addr:$src)>; // extload bool -> extload byte def : Pat<(extloadi8i1 addr:$src), (MOV8rm addr:$src)>; -def : Pat<(extloadi16i1 addr:$src), (MOVZX16rm8 addr:$src)>, - Requires<[In32BitMode]>; +def : Pat<(extloadi16i1 addr:$src), + (INSERT_SUBREG (i16 (IMPLICIT_DEF)), (MOV8rm addr:$src), + x86_subreg_8bit)>; +def : Pat<(extloadi16i8 addr:$src), + (INSERT_SUBREG (i16 (IMPLICIT_DEF)), (MOV8rm addr:$src), + x86_subreg_8bit)>; +// For extloads with 32-bit results, chose instructions that +// define the whole 32 bits of the result, to avoid partial-register +// updates. def : Pat<(extloadi32i1 addr:$src), (MOVZX32rm8 addr:$src)>; -def : Pat<(extloadi16i8 addr:$src), (MOVZX16rm8 addr:$src)>, - Requires<[In32BitMode]>; def : Pat<(extloadi32i8 addr:$src), (MOVZX32rm8 addr:$src)>; def : Pat<(extloadi32i16 addr:$src), (MOVZX32rm16 addr:$src)>; // anyext -def : Pat<(i16 (anyext GR8 :$src)), (MOVZX16rr8 GR8 :$src)>, - Requires<[In32BitMode]>; -def : Pat<(i32 (anyext GR8 :$src)), (MOVZX32rr8 GR8 :$src)>, - Requires<[In32BitMode]>; +def : Pat<(i16 (anyext GR8:$src)), + (INSERT_SUBREG (i16 (IMPLICIT_DEF)), GR8:$src, x86_subreg_8bit)>; +def : Pat<(i32 (anyext GR8:$src)), + (INSERT_SUBREG (i32 (IMPLICIT_DEF)), GR8:$src, x86_subreg_8bit)>; def : Pat<(i32 (anyext GR16:$src)), (INSERT_SUBREG (i32 (IMPLICIT_DEF)), GR16:$src, x86_subreg_16bit)>; |