diff --git a/llvm/test/Transforms/IndVarSimplify/2012-07-17-lftr-undef.ll b/llvm/test/Transforms/IndVarSimplify/2012-07-17-lftr-undef.ll
index faecbfbe07ab..de5e30473a6c 100644
--- a/llvm/test/Transforms/IndVarSimplify/2012-07-17-lftr-undef.ll
+++ b/llvm/test/Transforms/IndVarSimplify/2012-07-17-lftr-undef.ll
@@ -1,12 +1,26 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt < %s -indvars -S | FileCheck %s
+@.str3 = private constant [6 x i8] c"%lld\0A\00", align 1
+declare i32 @printf(i8* noalias nocapture, ...) nounwind
+
 ; PR13371: indvars pass incorrectly substitutes 'undef' values
 ;
 ; LFTR should not user %undef as the loop counter.
-; CHECK-LABEL: @test(
-; CHECK-NOT: icmp{{.*}}undef
-@.str3 = private constant [6 x i8] c"%lld\0A\00", align 1
-declare i32 @printf(i8* noalias nocapture, ...) nounwind
 define i64 @test() nounwind {
+; CHECK-LABEL: @test(
+; CHECK-NEXT:  func_start:
+; CHECK-NEXT:    br label [[BLOCK9:%.*]]
+; CHECK:       block9:
+; CHECK-NEXT:    [[UNDEF:%.*]] = phi i64 [ [[NEXT_UNDEF:%.*]], [[BLOCK9]] ], [ undef, [[FUNC_START:%.*]] ]
+; CHECK-NEXT:    [[ITER:%.*]] = phi i64 [ [[NEXT_ITER:%.*]], [[BLOCK9]] ], [ 1, [[FUNC_START]] ]
+; CHECK-NEXT:    [[NEXT_ITER]] = add nuw nsw i64 [[ITER]], 1
+; CHECK-NEXT:    [[TMP0:%.*]] = tail call i32 (i8*, ...) @printf(i8* noalias nocapture getelementptr inbounds ([6 x i8], [6 x i8]* @.str3, i64 0, i64 0), i64 [[NEXT_ITER]], i64 [[UNDEF]])
+; CHECK-NEXT:    [[NEXT_UNDEF]] = add nsw i64 [[UNDEF]], 1
+; CHECK-NEXT:    [[_TMP_3:%.*]] = icmp ult i64 [[NEXT_ITER]], 100
+; CHECK-NEXT:    br i1 [[_TMP_3]], label [[BLOCK9]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret i64 0
+;
 func_start:
   br label %block9
 block9:                                           ; preds = %block9,%func_start
diff --git a/llvm/test/Transforms/IndVarSimplify/lftr-other-uses.ll b/llvm/test/Transforms/IndVarSimplify/lftr-other-uses.ll
index 09ec237cfc33..8f620f559210 100644
--- a/llvm/test/Transforms/IndVarSimplify/lftr-other-uses.ll
+++ b/llvm/test/Transforms/IndVarSimplify/lftr-other-uses.ll
@@ -1,7 +1,9 @@
-; RUN: opt < %s -indvars -disable-output
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -indvars -S | FileCheck %s
 
 ; Don't RAUW the loop's original comparison instruction if it has
 ; other uses which aren't dominated by the new comparison instruction.
+; Test is primarily checking for an assertion failure, not the actual output
 
 	%struct.DecRefPicMarking_s = type { i32, i32, i32, i32, i32, %struct.DecRefPicMarking_s* }
 	%struct.datapartition = type { %typedef.Bitstream*, %typedef.DecodingEnvironment, i32 (%struct.syntaxelement*, %struct.img_par*, %struct.inp_par*, %struct.datapartition*)* }
@@ -18,19 +20,33 @@
 	%typedef.TextureInfoContexts = type { [2 x %typedef.BiContextType], [4 x %typedef.BiContextType], [3 x [4 x %typedef.BiContextType]], [10 x [4 x %typedef.BiContextType]], [10 x [15 x %typedef.BiContextType]], [10 x [15 x %typedef.BiContextType]], [10 x [5 x %typedef.BiContextType]], [10 x [5 x %typedef.BiContextType]], [10 x [15 x %typedef.BiContextType]], [10 x [15 x %typedef.BiContextType]] }
 
 define void @readCBP_CABAC(%struct.syntaxelement* %se, %struct.inp_par* %inp, %struct.img_par* %img.1, %typedef.DecodingEnvironment* %dep_dp) {
+; CHECK-LABEL: @readCBP_CABAC(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[LOOPENTRY_0:%.*]]
+; CHECK:       loopentry.0:
+; CHECK-NEXT:    [[MB_Y_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[TMP_152:%.*]], [[LOOPENTRY_1:%.*]] ]
+; CHECK-NEXT:    [[TMP_14:%.*]] = icmp ule i32 [[MB_Y_0]], 3
+; CHECK-NEXT:    [[TMP_15:%.*]] = zext i1 [[TMP_14]] to i32
+; CHECK-NEXT:    br i1 [[TMP_14]], label [[LOOPENTRY_1]], label [[LOOPEXIT_0:%.*]]
+; CHECK:       loopentry.1:
+; CHECK-NEXT:    [[TMP_152]] = add nuw nsw i32 [[MB_Y_0]], 2
+; CHECK-NEXT:    br label [[LOOPENTRY_0]]
+; CHECK:       loopexit.0:
+; CHECK-NEXT:    unreachable
+;
 entry:
-	br label %loopentry.0
+  br label %loopentry.0
 
 loopentry.0:		; preds = %loopentry.1, %entry
-	%mb_y.0 = phi i32 [ 0, %entry ], [ %tmp.152, %loopentry.1 ]		; <i32> [#uses=2]
-	%tmp.14 = icmp sle i32 %mb_y.0, 3		; <i1> [#uses=2]
-	%tmp.15 = zext i1 %tmp.14 to i32		; <i32> [#uses=0]
-	br i1 %tmp.14, label %loopentry.1, label %loopexit.0
+  %mb_y.0 = phi i32 [ 0, %entry ], [ %tmp.152, %loopentry.1 ]		; <i32> [#uses=2]
+  %tmp.14 = icmp sle i32 %mb_y.0, 3		; <i1> [#uses=2]
+  %tmp.15 = zext i1 %tmp.14 to i32		; <i32> [#uses=0]
+  br i1 %tmp.14, label %loopentry.1, label %loopexit.0
 
 loopentry.1:		; preds = %loopentry.0
-	%tmp.152 = add i32 %mb_y.0, 2		; <i32> [#uses=1]
-	br label %loopentry.0
+  %tmp.152 = add i32 %mb_y.0, 2		; <i32> [#uses=1]
+  br label %loopentry.0
 
 loopexit.0:		; preds = %loopentry.0
-	unreachable
+  unreachable
 }