[llvm] [VPlan] Add VPWidenInduction recipe as common base class (NFC). (PR #120008)

[via llvm-commits]

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@@ -655,10 +655,10 @@ define void @print_expand_scev(i64 %y, ptr %ptr) {
 ; CHECK-NEXT:    EMIT vp<[[CAN_IV:%.+]]> = CANONICAL-INDUCTION ir<0>, vp<[[CAN_IV_NEXT:%.+]]>
 ; CHECK-NEXT:     WIDEN-INDUCTION\l" +
 ; CHECK-NEXT:     "  %iv = phi %iv.next, 0\l" +
-; CHECK-NEXT:     "  ir<%v2>, vp<[[EXP_SCEV]]>, vp<[[VF]]>
+; CHECK-NEXT:     "  %v2 = trunc %iv, vp<[[EXP_SCEV]]>, vp<[[VF]]>
 ; CHECK-NEXT:     vp<[[DERIVED_IV:%.+]]> = DERIVED-IV ir<0> + vp<[[CAN_IV]]> * vp<[[EXP_SCEV]]>
 ; CHECK-NEXT:     vp<[[STEPS:%.+]]> = SCALAR-STEPS vp<[[DERIVED_IV]]>, vp<[[EXP_SCEV]]>
-; CHECK-NEXT:     WIDEN ir<%v3> = add nuw ir<%v2>, ir<1>
+; CHECK-NEXT:     WIDEN ir<%v3> = add nuw ir<%iv>, ir<1>
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ayalz wrote:

How/is this related? It originally adds %v2.

https://github.com/llvm/llvm-project/pull/120008