[LV] Regenerate test checks for zero_unroll.ll (NFC).

Regenerate test checks to better show impact of
#96622.

Author: fhahn

llvm/test/Transforms/LoopVectorize/SystemZ/zero_unroll.ll

@@ -1,7 +1,43 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
 ; RUN: opt -S -passes=loop-vectorize -mtriple=s390x-linux-gnu -vectorizer-min-trip-count=8 < %s | FileCheck %s
 
 define i32 @main(i32 %arg, ptr nocapture readnone %arg1) #0 {
-;CHECK: vector.body:
+; CHECK-LABEL: define i32 @main(
+; CHECK-SAME: i32 [[ARG:%.*]], ptr nocapture readnone [[ARG1:%.*]]) #[[ATTR0:[0-9]+]] {
+; CHECK-NEXT:  [[ENTRY:.*]]:
+; CHECK-NEXT:    [[TMP0:%.*]] = alloca i8, align 1
+; CHECK-NEXT:    br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
+; CHECK:       [[VECTOR_PH]]:
+; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
+; CHECK:       [[VECTOR_BODY]]:
+; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
+; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = trunc i32 [[INDEX]] to i8
+; CHECK-NEXT:    [[TMP1:%.*]] = add i8 [[OFFSET_IDX]], 0
+; CHECK-NEXT:    [[TMP2:%.*]] = add i8 [[OFFSET_IDX]], 1
+; CHECK-NEXT:    [[TMP3:%.*]] = add i8 [[OFFSET_IDX]], 2
+; CHECK-NEXT:    [[TMP4:%.*]] = add i8 [[OFFSET_IDX]], 3
+; CHECK-NEXT:    [[TMP5:%.*]] = add i8 [[OFFSET_IDX]], 4
+; CHECK-NEXT:    [[TMP6:%.*]] = add i8 [[OFFSET_IDX]], 5
+; CHECK-NEXT:    [[TMP7:%.*]] = add i8 [[OFFSET_IDX]], 6
+; CHECK-NEXT:    [[TMP8:%.*]] = add i8 [[OFFSET_IDX]], 7
+; CHECK-NEXT:    store i8 [[TMP8]], ptr [[TMP0]], align 2
+; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 8
+; CHECK-NEXT:    [[TMP9:%.*]] = icmp eq i32 [[INDEX_NEXT]], 8
+; CHECK-NEXT:    br i1 [[TMP9]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
+; CHECK:       [[MIDDLE_BLOCK]]:
+; CHECK-NEXT:    br i1 false, label %[[RET:.*]], label %[[SCALAR_PH]]
+; CHECK:       [[SCALAR_PH]]:
+; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i8 [ 8, %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
+; CHECK-NEXT:    br label %[[LOOP:.*]]
+; CHECK:       [[LOOP]]:
+; CHECK-NEXT:    [[STOREMERGE_I_I:%.*]] = phi i8 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[TMP12_I_I:%.*]], %[[LOOP]] ]
+; CHECK-NEXT:    store i8 [[STOREMERGE_I_I]], ptr [[TMP0]], align 2
+; CHECK-NEXT:    [[TMP8_I_I:%.*]] = icmp ult i8 [[STOREMERGE_I_I]], 8
+; CHECK-NEXT:    [[TMP12_I_I]] = add nuw nsw i8 [[STOREMERGE_I_I]], 1
+; CHECK-NEXT:    br i1 [[TMP8_I_I]], label %[[LOOP]], label %[[RET]], !llvm.loop [[LOOP3:![0-9]+]]
+; CHECK:       [[RET]]:
+; CHECK-NEXT:    ret i32 0
+;
 entry:
   %0 = alloca i8, align 1
   br label %loop
@@ -19,3 +55,9 @@ ret:
 
 attributes #0 = { "target-cpu"="z13" }
 
+;.
+; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
+; CHECK: [[META1]] = !{!"llvm.loop.isvectorized", i32 1}
+; CHECK: [[META2]] = !{!"llvm.loop.unroll.runtime.disable"}
+; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META2]], [[META1]]}
+;.