[llvm] [LV] Apply urem folds to preheader (PR #213928)

[David Sherwood via llvm-commits]

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@@ -123,12 +123,12 @@ define void @epilogue_main_loop_dead(ptr %dst, i32 %width, ptr %src) {
 ; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[TMP2]], [[N_VEC]]
 ; CHECK-NEXT:    br i1 [[CMP_N]], label %[[EXIT_LOOPEXIT]], label %[[SCALAR_PH]]
 ; CHECK:       [[SCALAR_PH]]:
-; CHECK-NEXT:    [[BC_RESUME_VAL12:%.*]] = phi ptr [ [[TMP7]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP13]], %[[VEC_EPILOG_ITER_CHECK]] ], [ [[DST]], %[[VECTOR_MEMCHECK1]] ], [ [[DST]], %[[LOOP_PREHEADER]] ]
-; CHECK-NEXT:    [[BC_RESUME_VAL13:%.*]] = phi i32 [ [[TMP8]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP15]], %[[VEC_EPILOG_ITER_CHECK]] ], [ [[WIDTH]], %[[VECTOR_MEMCHECK1]] ], [ [[WIDTH]], %[[LOOP_PREHEADER]] ]
+; CHECK-NEXT:    [[BC_RESUME_VAL11:%.*]] = phi ptr [ [[TMP7]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP13]], %[[VEC_EPILOG_ITER_CHECK]] ], [ [[DST]], %[[VECTOR_MEMCHECK1]] ], [ [[DST]], %[[LOOP_PREHEADER]] ]
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david-arm wrote:

@artagnon this is an example that I think can be easily fixed by a pre-commit regenerating CHECK lines. The urem changes didn't affect the variable name.

https://github.com/llvm/llvm-project/pull/213928