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[X86] Add hasSideEffects=0 and mayLoad=1 to MOVZX64* instructions. While there remove a superfluous _Q from the instruction names.

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llvm-svn: 257032
This commit is contained in:
Craig Topper 2016-01-07 05:57:39 +00:00
parent 1be3f64baf
commit 1e8c72699f
2 changed files with 18 additions and 14 deletions
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28
lib/Target/X86/X86InstrExtension.td
View File

@ -146,18 +146,22 @@ def MOVSX64rm32: RI<0x63, MRMSrcMem, (outs GR64:$dst), (ins i32mem:$src),
Sched<[WriteALULd]>, Requires<[In64BitMode]>;
// movzbq and movzwq encodings for the disassembler
def MOVZX64rr8_Q : RI<0xB6, MRMSrcReg, (outs GR64:$dst), (ins GR8:$src),
"movz{bq|x}\t{$src, $dst|$dst, $src}", [], IIC_MOVZX>,
TB, Sched<[WriteALU]>;
def MOVZX64rm8_Q : RI<0xB6, MRMSrcMem, (outs GR64:$dst), (ins i8mem:$src),
"movz{bq|x}\t{$src, $dst|$dst, $src}", [], IIC_MOVZX>,
TB, Sched<[WriteALULd]>;
def MOVZX64rr16_Q : RI<0xB7, MRMSrcReg, (outs GR64:$dst), (ins GR16:$src),
"movz{wq|x}\t{$src, $dst|$dst, $src}", [], IIC_MOVZX>,
TB, Sched<[WriteALU]>;
def MOVZX64rm16_Q : RI<0xB7, MRMSrcMem, (outs GR64:$dst), (ins i16mem:$src),
"movz{wq|x}\t{$src, $dst|$dst, $src}", [], IIC_MOVZX>,
TB, Sched<[WriteALULd]>;
let hasSideEffects = 0 in {
def MOVZX64rr8 : RI<0xB6, MRMSrcReg, (outs GR64:$dst), (ins GR8:$src),
"movz{bq|x}\t{$src, $dst|$dst, $src}", [], IIC_MOVZX>,
TB, Sched<[WriteALU]>;
let mayLoad = 1 in
def MOVZX64rm8 : RI<0xB6, MRMSrcMem, (outs GR64:$dst), (ins i8mem:$src),
"movz{bq|x}\t{$src, $dst|$dst, $src}", [], IIC_MOVZX>,
TB, Sched<[WriteALULd]>;
def MOVZX64rr16 : RI<0xB7, MRMSrcReg, (outs GR64:$dst), (ins GR16:$src),
"movz{wq|x}\t{$src, $dst|$dst, $src}", [], IIC_MOVZX>,
TB, Sched<[WriteALU]>;
let mayLoad = 1 in
def MOVZX64rm16 : RI<0xB7, MRMSrcMem, (outs GR64:$dst), (ins i16mem:$src),
"movz{wq|x}\t{$src, $dst|$dst, $src}", [], IIC_MOVZX>,
TB, Sched<[WriteALULd]>;
}
// 64-bit zero-extension patterns use SUBREG_TO_REG and an operation writing a
// 32-bit register.

4
lib/Target/X86/X86InstrInfo.td
View File

@ -2965,8 +2965,8 @@ def : InstAlias<"movzx {$src, $dst|$dst, $src}", (MOVZX16rr8 GR16:$dst, GR8:$src
def : InstAlias<"movzx {$src, $dst|$dst, $src}", (MOVZX16rm8 GR16:$dst, i8mem:$src), 0>;
def : InstAlias<"movzx {$src, $dst|$dst, $src}", (MOVZX32rr8 GR32:$dst, GR8:$src), 0>;
def : InstAlias<"movzx {$src, $dst|$dst, $src}", (MOVZX32rr16 GR32:$dst, GR16:$src), 0>;
def : InstAlias<"movzx {$src, $dst|$dst, $src}", (MOVZX64rr8_Q GR64:$dst, GR8:$src), 0>;
def : InstAlias<"movzx {$src, $dst|$dst, $src}", (MOVZX64rr16_Q GR64:$dst, GR16:$src), 0>;
def : InstAlias<"movzx {$src, $dst|$dst, $src}", (MOVZX64rr8 GR64:$dst, GR8:$src), 0>;
def : InstAlias<"movzx {$src, $dst|$dst, $src}", (MOVZX64rr16 GR64:$dst, GR16:$src), 0>;
// Note: No GR32->GR64 movzx form.
// outb %dx -> outb %al, %dx