[llvm] [LV] Skip low-trip count logic there is no scalar tail (PR #225633)

[Florian Hahn via llvm-commits]

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@@ -3,20 +3,22 @@
 ; RUN: opt -passes=loop-vectorize -mtriple=riscv64 -mattr=+v -low-trip-count-loop-body-size-limit=0 -tail-folding-policy=must-fold-tail -S %s | FileCheck %s --check-prefix=NO-EPILOGUE
 ; RUN: opt -passes=loop-vectorize -mtriple=riscv64 -mattr=+v -vectorizer-min-trip-count=0 -tail-folding-policy=dont-fold-tail -force-vector-width=2 -S %s | FileCheck %s --check-prefix=EPILOGUE
 
-; FIXME: Currently this gets miscompiled, as the forced scalar epilogue is missing.
 define i32 @countable_early_exit(ptr noalias %b) {
 ; NO-EPILOGUE-LABEL: define i32 @countable_early_exit(
 ; NO-EPILOGUE-SAME: ptr noalias [[B:%.*]]) #[[ATTR0:[0-9]+]] {
-; NO-EPILOGUE-NEXT:  [[ENTRY:.*:]]
-; NO-EPILOGUE-NEXT:    br label %[[VECTOR_PH:.*]]
-; NO-EPILOGUE:       [[VECTOR_PH]]:
+; NO-EPILOGUE-NEXT:  [[VECTOR_PH:.*]]:
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fhahn wrote:

done thanks

https://github.com/llvm/llvm-project/pull/225633