[llvm] [VPlan] Model first memory runtime checks as VPlan recipes. (PR #221483)

[Florian Hahn via llvm-commits]

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@@ -69,7 +69,7 @@ define void @reduced(ptr %0, ptr %1, i64 %iv, ptr %2, i64 %iv76, i64 %iv93) {
 ; CHECK-NEXT:    [[ARRAYIDX_I_I62:%.*]] = getelementptr i32, ptr [[TMP0]], i64 [[IDXPROM_I_I61]]
 ; CHECK-NEXT:    [[MIN_ITERS_CHECK20:%.*]] = icmp ult i64 [[TMP3]], 4
 ; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK20]], label [[SCALAR_PH19:%.*]], label [[VECTOR_MEMCHECK13:%.*]]
-; CHECK:       vector.memcheck13:
+; CHECK:       vector.memcheck20:
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fhahn wrote:

As-is they cannot; we now create the check block in VPlan, which means the block is created at a different time, so it will get a different suffix to de-duplicate

https://github.com/llvm/llvm-project/pull/221483