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[SystemZ] Bugfix in getDemandedSrcElements(). #88623

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Merged
merged 1 commit into from
Apr 15, 2024
Merged

[SystemZ] Bugfix in getDemandedSrcElements(). #88623

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2 changes: 1 addition & 1 deletion llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -7818,7 +7818,7 @@ static APInt getDemandedSrcElements(SDValue Op, const APInt &DemandedElts,
break;
}
case Intrinsic::s390_vperm:
SrcDemE = APInt(NumElts, 1);
SrcDemE = APInt(NumElts, -1);
break;
default:
llvm_unreachable("Unhandled intrinsic.");
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19 changes: 19 additions & 0 deletions llvm/test/CodeGen/SystemZ/knownbits-intrinsics-binop.ll
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Expand Up @@ -458,3 +458,22 @@ define <16 x i8> @f30() {
i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1>
ret <16 x i8> %res
}

; Test VPERM with various constant operands.
define i32 @f31() {
; CHECK-LABEL: f31:
; CHECK-LABEL: # %bb.0:
; CHECK-NEXT: larl %r1, .LCPI31_0
; CHECK-NEXT: vl %v0, 0(%r1), 3
; CHECK-NEXT: larl %r1, .LCPI31_1
; CHECK-NEXT: vl %v1, 0(%r1), 3
; CHECK-NEXT: vperm %v0, %v1, %v1, %v0
; CHECK-NEXT: vlgvb %r2, %v0, 0
; CHECK-NEXT: nilf %r2, 7
; CHECK-NEXT: # kill: def $r2l killed $r2l killed $r2d
; CHECK-NEXT: br %r14
%P = tail call <16 x i8> @llvm.s390.vperm(<16 x i8> <i8 0, i8 1, i8 1, i8 2, i8 1, i8 2, i8 2, i8 3, i8 1, i8 2, i8 2, i8 3, i8 2, i8 3, i8 3, i8 4>, <16 x i8> <i8 0, i8 1, i8 1, i8 2, i8 1, i8 2, i8 2, i8 3, i8 1, i8 2, i8 2, i8 3, i8 2, i8 3, i8 3, i8 4>, <16 x i8> <i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 9, i8 10, i8 11, i8 12, i8 13, i8 14, i8 15, i8 0>)
%E = extractelement <16 x i8> %P, i64 0
%res = zext i8 %E to i32
ret i32 %res
}