[llvm] [GlobalIsel] Combine G_SELECT (PR #74116)

[Thorsten Schütt via llvm-commits]

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@@ -32,36 +32,18 @@ define i32 @test0(i32 %v0, i32 %v1, i32 %v2) {
 ; sequences. This case should be transformed to select(C0, select(C1, x, y), y)
 ; anyway to get CSE effects.
 define void @test1(i32 %bitset, i32 %val0, i32 %val1) {
-; SDISEL-LABEL: test1:
-; SDISEL:       // %bb.0:
-; SDISEL-NEXT:    cmp w0, #7
-; SDISEL-NEXT:    adrp x9, out
-; SDISEL-NEXT:    csel w8, w1, w2, eq
-; SDISEL-NEXT:    cmp w8, #13
-; SDISEL-NEXT:    csel w8, w1, w2, lo
-; SDISEL-NEXT:    cmp w0, #42
-; SDISEL-NEXT:    csel w10, w1, w8, eq
-; SDISEL-NEXT:    str w8, [x9, :lo12:out]
-; SDISEL-NEXT:    str w10, [x9, :lo12:out]
-; SDISEL-NEXT:    ret
-;
-; GISEL-LABEL: test1:
-; GISEL:       // %bb.0:
-; GISEL-NEXT:    cmp w0, #7
-; GISEL-NEXT:    csel w8, w1, w2, eq
-; GISEL-NEXT:    cmp w8, #13
-; GISEL-NEXT:    cset w8, lo
-; GISEL-NEXT:    tst w8, #0x1
-; GISEL-NEXT:    csel w9, w1, w2, ne
-; GISEL-NEXT:    cmp w0, #42
-; GISEL-NEXT:    cset w10, eq
-; GISEL-NEXT:    orr w8, w10, w8
-; GISEL-NEXT:    tst w8, #0x1
-; GISEL-NEXT:    adrp x8, out
-; GISEL-NEXT:    csel w10, w1, w2, ne
-; GISEL-NEXT:    str w9, [x8, :lo12:out]
-; GISEL-NEXT:    str w10, [x8, :lo12:out]
-; GISEL-NEXT:    ret
+; CHECK-LABEL: test1:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    cmp w0, #7
+; CHECK-NEXT:    adrp x9, out
+; CHECK-NEXT:    csel w8, w1, w2, eq
+; CHECK-NEXT:    cmp w8, #13
+; CHECK-NEXT:    csel w8, w1, w2, lo
+; CHECK-NEXT:    cmp w0, #42
+; CHECK-NEXT:    csel w10, w1, w8, eq
+; CHECK-NEXT:    str w8, [x9, :lo12:out]
+; CHECK-NEXT:    str w10, [x9, :lo12:out]
+; CHECK-NEXT:    ret
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tschuett wrote:

win

https://github.com/llvm/llvm-project/pull/74116