[llvm] [GlobalIsel][AArch64] MVP for vectorized selects. (PR #76104)

[Thorsten Schütt via llvm-commits]

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@@ -53,13 +53,8 @@ body:             |
     ; CHECK-NEXT: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[C]](s32), [[C]](s32)
     ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(<2 x s32>) = G_ICMP intpred(sgt), [[COPY]](<2 x s32>), [[BUILD_VECTOR]]
     ; CHECK-NEXT: [[SEXT_INREG:%[0-9]+]]:_(<2 x s32>) = G_SEXT_INREG [[ICMP]], 1
-    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 -1
-    ; CHECK-NEXT: [[BUILD_VECTOR1:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[C1]](s32), [[C1]](s32)
-    ; CHECK-NEXT: [[XOR:%[0-9]+]]:_(<2 x s32>) = G_XOR [[SEXT_INREG]], [[BUILD_VECTOR1]]
-    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(<2 x s32>) = G_AND [[COPY1]], [[SEXT_INREG]]
-    ; CHECK-NEXT: [[AND1:%[0-9]+]]:_(<2 x s32>) = G_AND [[COPY]], [[XOR]]
-    ; CHECK-NEXT: [[OR:%[0-9]+]]:_(<2 x s32>) = G_OR [[AND]], [[AND1]]
-    ; CHECK-NEXT: $d0 = COPY [[OR]](<2 x s32>)
+    ; CHECK-NEXT: [[SELECT:%[0-9]+]]:_(<2 x s32>) = G_SELECT [[SEXT_INREG]](<2 x s32>), [[COPY1]], [[COPY]]
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tschuett wrote:

The combiner now sees a select and not the binary operators and a build vector.

https://github.com/llvm/llvm-project/pull/76104