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[AMDGPU] Simplify SelectPat and remove comment obsoleted by D133593

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This commit is contained in:
Jay Foad 2022-11-14 11:36:24 +00:00
parent 034df6f732
commit eb05da5eed
1 changed files with 2 additions and 6 deletions
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8
llvm/lib/Target/AMDGPU/SOPInstructions.td
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@ -517,11 +517,7 @@ def S_MAX_U32 : SOP2_32 <"s_max_u32",
} // End isCommutable = 1
} // End Defs = [SCC]
// This pattern is restricted to certain subtargets (practically GFX8Plus)
// because isel sometimes produces an sreg_64 copy to SCC as a by-product
// of this pattern, and only for subtargets with hasScalarCompareEq64
// is it possible to map such copy to a single instruction (S_CMP_LG_U64).
class SelectPat<SDPatternOperator select> : PatFrag <
def SelectPat : PatFrag <
(ops node:$src1, node:$src2),
(select SCC, $src1, $src2),
[{ return !N->isDivergent(); }]
@ -530,7 +526,7 @@ class SelectPat<SDPatternOperator select> : PatFrag <
let Uses = [SCC] in {
let AddedComplexity = 20 in {
def S_CSELECT_B32 : SOP2_32 <"s_cselect_b32",
[(set i32:$sdst, (SelectPat<select> i32:$src0, i32:$src1))]
[(set i32:$sdst, (SelectPat i32:$src0, i32:$src1))]
>;
}