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Annotate various null idioms with SchedRW lists. 

llvm-svn: 177461
This commit is contained in:
Jakob Stoklund Olesen 2013-03-19 23:23:31 +00:00
parent 24aac1dc92
commit 3a546156c7
1 changed files with 4 additions and 4 deletions
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8
llvm/lib/Target/X86/X86InstrSSE.td
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@ -364,7 +364,7 @@ let Predicates = [HasAVX] in {
// Alias instructions that map fld0 to xorps for sse or vxorps for avx.
// This is expanded by ExpandPostRAPseudos.
let isReMaterializable = 1, isAsCheapAsAMove = 1, canFoldAsLoad = 1,
isPseudo = 1 in {
isPseudo = 1, SchedRW = [WriteZero] in {
def FsFLD0SS : I<0, Pseudo, (outs FR32:$dst), (ins), "",
[(set FR32:$dst, fp32imm0)]>, Requires<[HasSSE1]>;
def FsFLD0SD : I<0, Pseudo, (outs FR64:$dst), (ins), "",
@ -381,7 +381,7 @@ let isReMaterializable = 1, isAsCheapAsAMove = 1, canFoldAsLoad = 1,
// We set canFoldAsLoad because this can be converted to a constant-pool
// load of an all-zeros value if folding it would be beneficial.
let isReMaterializable = 1, isAsCheapAsAMove = 1, canFoldAsLoad = 1,
isPseudo = 1 in {
isPseudo = 1, SchedRW = [WriteZero] in {
def V_SET0 : I<0, Pseudo, (outs VR128:$dst), (ins), "",
[(set VR128:$dst, (v4f32 immAllZerosV))]>;
}
@ -398,7 +398,7 @@ def : Pat<(v16i8 immAllZerosV), (V_SET0)>;
// at the rename stage without using any execution unit, so SET0PSY
// and SET0PDY can be used for vector int instructions without penalty
let isReMaterializable = 1, isAsCheapAsAMove = 1, canFoldAsLoad = 1,
isPseudo = 1, Predicates = [HasAVX] in {
isPseudo = 1, Predicates = [HasAVX], SchedRW = [WriteZero] in {
def AVX_SET0 : I<0, Pseudo, (outs VR256:$dst), (ins), "",
[(set VR256:$dst, (v8f32 immAllZerosV))]>;
}
@ -436,7 +436,7 @@ def : Pat<(bc_v4i64 (v8f32 immAllZerosV)),
// We set canFoldAsLoad because this can be converted to a constant-pool
// load of an all-ones value if folding it would be beneficial.
let isReMaterializable = 1, isAsCheapAsAMove = 1, canFoldAsLoad = 1,
isPseudo = 1 in {
isPseudo = 1, SchedRW = [WriteZero] in {
def V_SETALLONES : I<0, Pseudo, (outs VR128:$dst), (ins), "",
[(set VR128:$dst, (v4i32 immAllOnesV))]>;
let Predicates = [HasAVX2] in