[llvm] [LoongArch] Optimize inserting fp element to vector (PR #149302)

[via llvm-commits]

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@@ -467,22 +467,22 @@ entry:
 define void @buildvector_v8f32(ptr %dst, float %a0, float %a1, float %a2, float %a3, float %a4, float %a5, float %a6, float %a7) nounwind {
 ; CHECK-LABEL: buildvector_v8f32:
 ; CHECK:       # %bb.0: # %entry
-; CHECK-NEXT:    movfr2gr.s $a1, $fa0
-; CHECK-NEXT:    xvinsgr2vr.w $xr0, $a1, 0
-; CHECK-NEXT:    movfr2gr.s $a1, $fa1
-; CHECK-NEXT:    xvinsgr2vr.w $xr0, $a1, 1
-; CHECK-NEXT:    movfr2gr.s $a1, $fa2
-; CHECK-NEXT:    xvinsgr2vr.w $xr0, $a1, 2
-; CHECK-NEXT:    movfr2gr.s $a1, $fa3
-; CHECK-NEXT:    xvinsgr2vr.w $xr0, $a1, 3
-; CHECK-NEXT:    movfr2gr.s $a1, $fa4
-; CHECK-NEXT:    xvinsgr2vr.w $xr0, $a1, 4
-; CHECK-NEXT:    movfr2gr.s $a1, $fa5
-; CHECK-NEXT:    xvinsgr2vr.w $xr0, $a1, 5
-; CHECK-NEXT:    movfr2gr.s $a1, $fa6
-; CHECK-NEXT:    xvinsgr2vr.w $xr0, $a1, 6
-; CHECK-NEXT:    movfr2gr.s $a1, $fa7
-; CHECK-NEXT:    xvinsgr2vr.w $xr0, $a1, 7
+; CHECK-NEXT:    # kill: def $f7 killed $f7 def $xr7
+; CHECK-NEXT:    # kill: def $f6 killed $f6 def $xr6
+; CHECK-NEXT:    # kill: def $f5 killed $f5 def $xr5
+; CHECK-NEXT:    # kill: def $f4 killed $f4 def $xr4
+; CHECK-NEXT:    # kill: def $f3 killed $f3 def $xr3
+; CHECK-NEXT:    # kill: def $f2 killed $f2 def $xr2
+; CHECK-NEXT:    # kill: def $f1 killed $f1 def $xr1
+; CHECK-NEXT:    # kill: def $f0 killed $f0 def $xr0
+; CHECK-NEXT:    xvinsve0.w $xr0, $xr0, 0
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zhaoqi5 wrote:

It can be deleted by optimizing `build_vector`. See https://github.com/llvm/llvm-project/pull/149486. Thanks.

https://github.com/llvm/llvm-project/pull/149302