Remove br i1 undef in LoopSimplifyCFG directory

Author: leewei05

llvm/test/Transforms/LoopSimplifyCFG/constant-fold-branch.ll

@@ -2580,20 +2580,20 @@ exit:
   ret i32 %result
 }
 
-define void @test_crash_01() {
+define void @test_crash_01(i1 %arg, i32 %arg2) {
 ; CHECK-LABEL: @test_crash_01(
 ; CHECK-NEXT:  bb:
 ; CHECK-NEXT:    br label [[BB1:%.*]]
 ; CHECK:       bb1:
-; CHECK-NEXT:    br i1 undef, label [[BB17:%.*]], label [[BB2:%.*]]
+; CHECK-NEXT:    br i1 %arg, label [[BB17:%.*]], label [[BB2:%.*]]
 ; CHECK:       bb2:
 ; CHECK-NEXT:    switch i32 0, label [[BB2_SPLIT:%.*]] [
 ; CHECK-NEXT:    i32 1, label [[BB19:%.*]]
 ; CHECK-NEXT:    ]
 ; CHECK:       bb2.split:
 ; CHECK-NEXT:    br label [[BB3:%.*]]
 ; CHECK:       bb3:
-; CHECK-NEXT:    switch i32 undef, label [[BB16:%.*]] [
+; CHECK-NEXT:    switch i32 %arg2, label [[BB16:%.*]] [
 ; CHECK-NEXT:    i32 0, label [[BB15:%.*]]
 ; CHECK-NEXT:    i32 1, label [[BB14:%.*]]
 ; CHECK-NEXT:    i32 2, label [[BB13:%.*]]
@@ -2607,7 +2607,7 @@ define void @test_crash_01() {
 ; CHECK:       bb7:
 ; CHECK-NEXT:    unreachable
 ; CHECK:       bb8:
-; CHECK-NEXT:    switch i32 undef, label [[BB28:%.*]] [
+; CHECK-NEXT:    switch i32 %arg2, label [[BB28:%.*]] [
 ; CHECK-NEXT:    i32 0, label [[BB27:%.*]]
 ; CHECK-NEXT:    i32 1, label [[BB26:%.*]]
 ; CHECK-NEXT:    i32 2, label [[BB23:%.*]]
@@ -2663,7 +2663,7 @@ bb:
   br label %bb1
 
 bb1:                                              ; preds = %bb
-  br i1 undef, label %bb17, label %bb2
+  br i1 %arg, label %bb17, label %bb2
 
 bb2:                                              ; preds = %bb1
   br label %bb3
@@ -2678,7 +2678,7 @@ bb4:                                              ; preds = %bb3
   ]
 
 bb5:                                              ; preds = %bb4
-  switch i32 undef, label %bb16 [
+  switch i32 %arg2, label %bb16 [
   i32 0, label %bb15
   i32 1, label %bb14
   i32 2, label %bb13
@@ -2697,7 +2697,7 @@ bb7:                                              ; preds = %bb5
   unreachable
 
 bb8:                                              ; preds = %bb11, %bb5
-  switch i32 undef, label %bb28 [
+  switch i32 %arg2, label %bb28 [
   i32 0, label %bb27
   i32 1, label %bb26
   i32 2, label %bb23

llvm/test/Transforms/LoopSimplifyCFG/update_parents.ll

@@ -37,10 +37,10 @@ bb3:                                              ; preds = %bb8, %bb3, %bb2
   br i1 false, label %bb4, label %bb3
 
 bb4:                                              ; preds = %bb8, %bb3
-  br i1 undef, label %bb1, label %bb6
+  br i1 true, label %bb1, label %bb6
 
 bb6:                                              ; preds = %bb4
-  br i1 undef, label %bb2, label %bb8
+  br i1 false, label %bb2, label %bb8
 
 bb8:                                              ; preds = %bb6
   br i1 true, label %bb4, label %bb3
@@ -78,7 +78,7 @@ bb3:
   br i1 false, label %bb4, label %bb3
 
 bb4:
-  br i1 undef, label %bb1, label %subloop1
+  br i1 %c, label %bb1, label %subloop1
 
 subloop1:
   br i1 %c, label %subloop2, label %subloop11
@@ -111,7 +111,7 @@ subloop2_latch:
   br label %subloop2
 
 bb6:
-  br i1 undef, label %bb2, label %bb8
+  br i1 %c, label %bb2, label %bb8
 
 bb8:
   br i1 true, label %bb4, label %bb3