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[LoongArch] Fix xvshuf instructions lowering (#145868)

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Fix https://github.com/llvm/llvm-project/issues/137000.
This commit is contained in:
ZhaoQi
2025-06-27 10:29:32 +08:00
committed by GitHub
parent d58b0f23d0
commit 30e519e1ad
2 changed files with 17 additions and 4 deletions
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2
llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
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@@ -2009,7 +2009,7 @@ static SDValue lowerVECTOR_SHUFFLE_XVSHUF(const SDLoc &DL, ArrayRef<int> Mask,
if (*it < 0) // UNDEF
MaskAlloc.push_back(DAG.getTargetConstant(0, DL, MVT::i64));
else if ((*it >= 0 && *it < HalfSize) ||
(*it >= MaskSize && *it <= MaskSize + HalfSize)) {
(*it >= MaskSize && *it < MaskSize + HalfSize)) {
int M = *it < HalfSize ? *it : *it - HalfSize;
MaskAlloc.push_back(DAG.getTargetConstant(M, DL, MVT::i64));
} else

19
llvm/test/CodeGen/LoongArch/lasx/ir-instruction/fix-xvshuf.ll
View File

@@ -6,9 +6,22 @@
define <4 x double> @shufflevector_v4f64(<4 x double> %a, <4 x double> %b) {
; CHECK-LABEL: shufflevector_v4f64:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: pcalau12i $a0, %pc_hi20(.LCPI0_0)
; CHECK-NEXT: xvld $xr2, $a0, %pc_lo12(.LCPI0_0)
; CHECK-NEXT: xvshuf.d $xr2, $xr1, $xr0
; CHECK-NEXT: xvpickve2gr.d $a0, $xr0, 0
; CHECK-NEXT: movgr2fr.d $fa2, $a0
; CHECK-NEXT: xvpickve2gr.d $a0, $xr1, 2
; CHECK-NEXT: movgr2fr.d $fa3, $a0
; CHECK-NEXT: movfr2gr.d $a0, $fa2
; CHECK-NEXT: xvinsgr2vr.d $xr2, $a0, 0
; CHECK-NEXT: movfr2gr.d $a0, $fa3
; CHECK-NEXT: xvinsgr2vr.d $xr2, $a0, 1
; CHECK-NEXT: xvpickve2gr.d $a0, $xr0, 3
; CHECK-NEXT: movgr2fr.d $fa0, $a0
; CHECK-NEXT: xvpickve2gr.d $a0, $xr1, 3
; CHECK-NEXT: movgr2fr.d $fa1, $a0
; CHECK-NEXT: movfr2gr.d $a0, $fa0
; CHECK-NEXT: xvinsgr2vr.d $xr2, $a0, 2
; CHECK-NEXT: movfr2gr.d $a0, $fa1
; CHECK-NEXT: xvinsgr2vr.d $xr2, $a0, 3
; CHECK-NEXT: xvori.b $xr0, $xr2, 0
; CHECK-NEXT: ret
entry: