Updated limit_main_loop_vf_to_avoid_dead_main_vector_loop test case in limit-vf-by-tripcount.ll that got fixed by patch #79651

Author: nilanjana87

llvm/test/Transforms/LoopVectorize/X86/limit-vf-by-tripcount.ll

@@ -279,49 +279,26 @@ exit:
 define void @limit_main_loop_vf_to_avoid_dead_main_vector_loop(ptr noalias %src, ptr noalias %dst) {
 ; CHECK-LABEL: @limit_main_loop_vf_to_avoid_dead_main_vector_loop(
 ; CHECK-NEXT:  entry:
-; CHECK-NEXT:    br i1 true, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
+; 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 i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
 ; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[INDEX]], 0
-; CHECK-NEXT:    [[TMP1:%.*]] = add i64 [[INDEX]], 8
-; CHECK-NEXT:    [[TMP2:%.*]] = add i64 [[INDEX]], 16
-; CHECK-NEXT:    [[TMP3:%.*]] = add i64 [[INDEX]], 24
-; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr inbounds [3 x i8], ptr [[SRC:%.*]], i64 [[TMP0]], i64 0
-; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds [3 x i8], ptr [[SRC]], i64 [[TMP1]], i64 0
-; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr inbounds [3 x i8], ptr [[SRC]], i64 [[TMP2]], i64 0
-; CHECK-NEXT:    [[TMP7:%.*]] = getelementptr inbounds [3 x i8], ptr [[SRC]], i64 [[TMP3]], i64 0
-; CHECK-NEXT:    [[TMP8:%.*]] = getelementptr inbounds i8, ptr [[TMP4]], i32 0
-; CHECK-NEXT:    [[TMP9:%.*]] = getelementptr inbounds i8, ptr [[TMP5]], i32 0
-; CHECK-NEXT:    [[TMP10:%.*]] = getelementptr inbounds i8, ptr [[TMP6]], i32 0
-; CHECK-NEXT:    [[TMP11:%.*]] = getelementptr inbounds i8, ptr [[TMP7]], i32 0
-; CHECK-NEXT:    [[WIDE_VEC:%.*]] = load <24 x i8>, ptr [[TMP8]], align 1
-; CHECK-NEXT:    [[WIDE_VEC1:%.*]] = load <24 x i8>, ptr [[TMP9]], align 1
-; CHECK-NEXT:    [[WIDE_VEC2:%.*]] = load <24 x i8>, ptr [[TMP10]], align 1
-; CHECK-NEXT:    [[WIDE_VEC3:%.*]] = load <24 x i8>, ptr [[TMP11]], align 1
+; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds [3 x i8], ptr [[SRC:%.*]], i64 [[TMP0]], i64 0
+; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds i8, ptr [[TMP1]], i32 0
+; CHECK-NEXT:    [[WIDE_VEC:%.*]] = load <24 x i8>, ptr [[TMP2]], align 1
 ; CHECK-NEXT:    [[STRIDED_VEC:%.*]] = shufflevector <24 x i8> [[WIDE_VEC]], <24 x i8> poison, <8 x i32> <i32 0, i32 3, i32 6, i32 9, i32 12, i32 15, i32 18, i32 21>
-; CHECK-NEXT:    [[STRIDED_VEC4:%.*]] = shufflevector <24 x i8> [[WIDE_VEC1]], <24 x i8> poison, <8 x i32> <i32 0, i32 3, i32 6, i32 9, i32 12, i32 15, i32 18, i32 21>
-; CHECK-NEXT:    [[STRIDED_VEC5:%.*]] = shufflevector <24 x i8> [[WIDE_VEC2]], <24 x i8> poison, <8 x i32> <i32 0, i32 3, i32 6, i32 9, i32 12, i32 15, i32 18, i32 21>
-; CHECK-NEXT:    [[STRIDED_VEC6:%.*]] = shufflevector <24 x i8> [[WIDE_VEC3]], <24 x i8> poison, <8 x i32> <i32 0, i32 3, i32 6, i32 9, i32 12, i32 15, i32 18, i32 21>
-; CHECK-NEXT:    [[TMP12:%.*]] = getelementptr inbounds i8, ptr [[DST:%.*]], i64 [[TMP0]]
-; CHECK-NEXT:    [[TMP13:%.*]] = getelementptr inbounds i8, ptr [[DST]], i64 [[TMP1]]
-; CHECK-NEXT:    [[TMP14:%.*]] = getelementptr inbounds i8, ptr [[DST]], i64 [[TMP2]]
-; CHECK-NEXT:    [[TMP15:%.*]] = getelementptr inbounds i8, ptr [[DST]], i64 [[TMP3]]
-; CHECK-NEXT:    [[TMP16:%.*]] = getelementptr inbounds i8, ptr [[TMP12]], i32 0
-; CHECK-NEXT:    [[TMP17:%.*]] = getelementptr inbounds i8, ptr [[TMP12]], i32 8
-; CHECK-NEXT:    [[TMP18:%.*]] = getelementptr inbounds i8, ptr [[TMP12]], i32 16
-; CHECK-NEXT:    [[TMP19:%.*]] = getelementptr inbounds i8, ptr [[TMP12]], i32 24
-; CHECK-NEXT:    store <8 x i8> [[STRIDED_VEC]], ptr [[TMP16]], align 1
-; CHECK-NEXT:    store <8 x i8> [[STRIDED_VEC4]], ptr [[TMP17]], align 1
-; CHECK-NEXT:    store <8 x i8> [[STRIDED_VEC5]], ptr [[TMP18]], align 1
-; CHECK-NEXT:    store <8 x i8> [[STRIDED_VEC6]], ptr [[TMP19]], align 1
-; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 32
-; CHECK-NEXT:    br i1 true, label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP12:![0-9]+]]
+; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds i8, ptr [[DST:%.*]], i64 [[TMP0]]
+; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr inbounds i8, ptr [[TMP3]], i32 0
+; CHECK-NEXT:    store <8 x i8> [[STRIDED_VEC]], ptr [[TMP4]], align 1
+; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 8
+; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i64 [[INDEX_NEXT]], 24
+; CHECK-NEXT:    br i1 [[TMP5]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP12:![0-9]+]]
 ; CHECK:       middle.block:
 ; CHECK-NEXT:    br label [[SCALAR_PH]]
 ; CHECK:       scalar.ph:
-; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ 0, [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
+; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ 24, [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
 ; CHECK-NEXT:    br label [[LOOP:%.*]]
 ; CHECK:       loop:
 ; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]