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[LoongArch] Improve pattern matching for AddLike predicate #82767

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Merged
merged 2 commits into from
Feb 26, 2024
Merged

[LoongArch] Improve pattern matching for AddLike predicate #82767

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7242beb
[SelectionDAG] Improve isOrEquivalentToAdd
heiher Feb 23, 2024
1609847
[LoongArch] Improve pattern matching for AddLike predicate
heiher Feb 24, 2024
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2 changes: 1 addition & 1 deletion llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
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Expand Up @@ -1048,7 +1048,7 @@ class PatGprImm_32<SDPatternOperator OpNode, LAInst Inst, Operand ImmOpnd>
/// Predicates
def AddLike: PatFrags<(ops node:$A, node:$B),
[(add node:$A, node:$B), (or node:$A, node:$B)], [{
return N->getOpcode() == ISD::ADD || isOrEquivalentToAdd(N);
return CurDAG->isBaseWithConstantOffset(SDValue(N, 0));
}]>;

/// Simple arithmetic operations
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3 changes: 1 addition & 2 deletions llvm/test/CodeGen/LoongArch/intrinsic-memcpy.ll
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Expand Up @@ -22,8 +22,7 @@ define void @box(ptr noalias nocapture noundef writeonly sret(%Box) align 16 der
; CHECK-NEXT: st.d $a1, $a0, 24
; CHECK-NEXT: ld.d $a1, $a3, 16
; CHECK-NEXT: st.d $a1, $a0, 16
; CHECK-NEXT: ori $a1, $a3, 8
; CHECK-NEXT: ld.d $a1, $a1, 0
; CHECK-NEXT: ld.d $a1, $a3, 8
; CHECK-NEXT: st.d $a1, $a0, 8
; CHECK-NEXT: addi.d $sp, $sp, 96
; CHECK-NEXT: ret
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