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Some shl patterns which do load + store folding.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24689 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2005-12-13 02:34:51 +00:00
parent 605c415046
commit 763b029b28
1 changed files with 16 additions and 6 deletions
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22
lib/Target/X86/X86InstrInfo.td
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@ -1017,17 +1017,27 @@ def SHL32ri : Ii8<0xC1, MRM4r, (ops R32:$dst, R32:$src1, i8imm:$src2),
let isTwoAddress = 0 in {
def SHL8mCL : I<0xD2, MRM4m, (ops i8mem :$dst),
"shl{b} {%cl, $dst|$dst, %CL}", []>, Imp<[CL],[]>;
"shl{b} {%cl, $dst|$dst, %CL}",
[(store (shl (loadi8 addr:$dst), CL), addr:$dst)]>,
Imp<[CL],[]>;
def SHL16mCL : I<0xD3, MRM4m, (ops i16mem:$dst),
"shl{w} {%cl, $dst|$dst, %CL}", []>, Imp<[CL],[]>, OpSize;
"shl{w} {%cl, $dst|$dst, %CL}",
[(store (shl (loadi16 addr:$dst), CL), addr:$dst)]>,
Imp<[CL],[]>, OpSize;
def SHL32mCL : I<0xD3, MRM4m, (ops i32mem:$dst),
"shl{l} {%cl, $dst|$dst, %CL}", []>, Imp<[CL],[]>;
"shl{l} {%cl, $dst|$dst, %CL}",
[(store (shl (loadi32 addr:$dst), CL), addr:$dst)]>,
Imp<[CL],[]>;
def SHL8mi : Ii8<0xC0, MRM4m, (ops i8mem :$dst, i8imm:$src),
"shl{b} {$src, $dst|$dst, $src}", []>;
"shl{b} {$src, $dst|$dst, $src}",
[(store (shl (loadi8 addr:$dst), (i8 imm:$src)), addr:$dst)]>;
def SHL16mi : Ii8<0xC1, MRM4m, (ops i16mem:$dst, i8imm:$src),
"shl{w} {$src, $dst|$dst, $src}", []>, OpSize;
"shl{w} {$src, $dst|$dst, $src}",
[(store (shl (loadi16 addr:$dst), (i8 imm:$src)), addr:$dst)]>,
OpSize;
def SHL32mi : Ii8<0xC1, MRM4m, (ops i32mem:$dst, i8imm:$src),
"shl{l} {$src, $dst|$dst, $src}", []>;
"shl{l} {$src, $dst|$dst, $src}",
[(store (shl (loadi32 addr:$dst), (i8 imm:$src)), addr:$dst)]>;
}
def SHR8rCL : I<0xD2, MRM5r, (ops R8 :$dst, R8 :$src),