diff options
Diffstat (limited to 'lib/Target/X86/X86Instr64bit.td')
| -rw-r--r-- | lib/Target/X86/X86Instr64bit.td | 69 |
1 files changed, 58 insertions, 11 deletions
diff --git a/lib/Target/X86/X86Instr64bit.td b/lib/Target/X86/X86Instr64bit.td index 10e66e8..05bccab 100644 --- a/lib/Target/X86/X86Instr64bit.td +++ b/lib/Target/X86/X86Instr64bit.td @@ -1522,7 +1522,7 @@ def : Pat<(store (add (loadi64 addr:$dst), 0x00000000800000000), addr:$dst), // r & (2^32-1) ==> movz def : Pat<(and GR64:$src, 0x00000000FFFFFFFF), - (MOVZX64rr32 (i32 (EXTRACT_SUBREG GR64:$src, x86_subreg_32bit)))>; + (MOVZX64rr32 (EXTRACT_SUBREG GR64:$src, x86_subreg_32bit))>; // r & (2^16-1) ==> movz def : Pat<(and GR64:$src, 0xffff), (MOVZX64rr16 (i16 (EXTRACT_SUBREG GR64:$src, x86_subreg_16bit)))>; @@ -1531,7 +1531,7 @@ def : Pat<(and GR64:$src, 0xff), (MOVZX64rr8 (i8 (EXTRACT_SUBREG GR64:$src, x86_subreg_8bit)))>; // r & (2^8-1) ==> movz def : Pat<(and GR32:$src1, 0xff), - (MOVZX32rr8 (i8 (EXTRACT_SUBREG GR32:$src1, x86_subreg_8bit)))>, + (MOVZX32rr8 (EXTRACT_SUBREG GR32:$src1, x86_subreg_8bit))>, Requires<[In64BitMode]>; // r & (2^8-1) ==> movz def : Pat<(and GR16:$src1, 0xff), @@ -1540,13 +1540,13 @@ def : Pat<(and GR16:$src1, 0xff), // sext_inreg patterns def : Pat<(sext_inreg GR64:$src, i32), - (MOVSX64rr32 (i32 (EXTRACT_SUBREG GR64:$src, x86_subreg_32bit)))>; + (MOVSX64rr32 (EXTRACT_SUBREG GR64:$src, x86_subreg_32bit))>; def : Pat<(sext_inreg GR64:$src, i16), - (MOVSX64rr16 (i16 (EXTRACT_SUBREG GR64:$src, x86_subreg_16bit)))>; + (MOVSX64rr16 (EXTRACT_SUBREG GR64:$src, x86_subreg_16bit))>; def : Pat<(sext_inreg GR64:$src, i8), - (MOVSX64rr8 (i8 (EXTRACT_SUBREG GR64:$src, x86_subreg_8bit)))>; + (MOVSX64rr8 (EXTRACT_SUBREG GR64:$src, x86_subreg_8bit))>; def : Pat<(sext_inreg GR32:$src, i8), - (MOVSX32rr8 (i8 (EXTRACT_SUBREG GR32:$src, x86_subreg_8bit)))>, + (MOVSX32rr8 (EXTRACT_SUBREG GR32:$src, x86_subreg_8bit))>, Requires<[In64BitMode]>; def : Pat<(sext_inreg GR16:$src, i8), (MOVSX16rr8 (i8 (EXTRACT_SUBREG GR16:$src, x86_subreg_8bit)))>, @@ -1554,16 +1554,63 @@ def : Pat<(sext_inreg GR16:$src, i8), // trunc patterns def : Pat<(i32 (trunc GR64:$src)), - (i32 (EXTRACT_SUBREG GR64:$src, x86_subreg_32bit))>; + (EXTRACT_SUBREG GR64:$src, x86_subreg_32bit)>; def : Pat<(i16 (trunc GR64:$src)), - (i16 (EXTRACT_SUBREG GR64:$src, x86_subreg_16bit))>; + (EXTRACT_SUBREG GR64:$src, x86_subreg_16bit)>; def : Pat<(i8 (trunc GR64:$src)), - (i8 (EXTRACT_SUBREG GR64:$src, x86_subreg_8bit))>; + (EXTRACT_SUBREG GR64:$src, x86_subreg_8bit)>; def : Pat<(i8 (trunc GR32:$src)), - (i8 (EXTRACT_SUBREG GR32:$src, x86_subreg_8bit))>, + (EXTRACT_SUBREG GR32:$src, x86_subreg_8bit)>, Requires<[In64BitMode]>; def : Pat<(i8 (trunc GR16:$src)), - (i8 (EXTRACT_SUBREG GR16:$src, x86_subreg_8bit))>, + (EXTRACT_SUBREG GR16:$src, x86_subreg_8bit)>, + Requires<[In64BitMode]>; + +// h-register tricks. +// For now, be conservative and only the extract if the value is immediately +// zero-extended or stored, which are somewhat common cases. This uses a bunch +// of code to prevent a register requiring a REX prefix from being allocated in +// the same instruction as the h register, as there's currently no way to +// describe this requirement to the register allocator. + +// h-register extract and zero-extend. +def : Pat<(and (srl_su GR64:$src, (i8 8)), (i64 255)), + (SUBREG_TO_REG + (i64 0), + (MOVZX32_NOREXrr8 + (EXTRACT_SUBREG (COPY_TO_SUBCLASS GR64:$src, GR64_), + x86_subreg_8bit_hi)), + x86_subreg_32bit)>; +def : Pat<(and (srl_su GR32:$src, (i8 8)), (i32 255)), + (MOVZX32_NOREXrr8 + (EXTRACT_SUBREG (COPY_TO_SUBCLASS GR32:$src, GR32_), + x86_subreg_8bit_hi))>, + Requires<[In64BitMode]>; +def : Pat<(srl_su GR16:$src, (i8 8)), + (EXTRACT_SUBREG + (MOVZX32_NOREXrr8 + (EXTRACT_SUBREG (COPY_TO_SUBCLASS GR16:$src, GR16_), + x86_subreg_8bit_hi)), + x86_subreg_16bit)>, + Requires<[In64BitMode]>; + +// h-register extract and store. +def : Pat<(store (i8 (trunc_su (srl_su GR64:$src, (i8 8)))), addr:$dst), + (MOV8mr_NOREX + addr:$dst, + (EXTRACT_SUBREG (COPY_TO_SUBCLASS GR64:$src, GR64_), + x86_subreg_8bit_hi))>; +def : Pat<(store (i8 (trunc_su (srl_su GR32:$src, (i8 8)))), addr:$dst), + (MOV8mr_NOREX + addr:$dst, + (EXTRACT_SUBREG (COPY_TO_SUBCLASS GR32:$src, GR32_), + x86_subreg_8bit_hi))>, + Requires<[In64BitMode]>; +def : Pat<(store (i8 (trunc_su (srl_su GR16:$src, (i8 8)))), addr:$dst), + (MOV8mr_NOREX + addr:$dst, + (EXTRACT_SUBREG (COPY_TO_SUBCLASS GR16:$src, GR16_), + x86_subreg_8bit_hi))>, Requires<[In64BitMode]>; // (shl x, 1) ==> (add x, x) |