[DFAJumpThreading][NFC] Reduce tests

Author: XChy

llvm/test/Transforms/DFAJumpThreading/dfa-jump-threading-transform.ll

@@ -233,14 +233,12 @@ exit:
   ret i32 0
 }
 
-define void @pr78059_bitwidth(i1 %c) {
+define void @pr78059_bitwidth() {
 ; CHECK-LABEL: @pr78059_bitwidth(
-; CHECK-NEXT:  entry:
-; CHECK-NEXT:    br i1 [[C:%.*]], label [[DOTSPLIT_PREHEADER:%.*]], label [[DOTSPLIT_PREHEADER]]
-; CHECK:       .split.preheader:
+; CHECK-NEXT:  .split.preheader:
 ; CHECK-NEXT:    br label [[DOTSPLIT:%.*]]
 ; CHECK:       .split:
-; CHECK-NEXT:    [[TMP0:%.*]] = phi i128 [ 0, [[DOTSPLIT_PREHEADER]] ]
+; CHECK-NEXT:    [[TMP0:%.*]] = phi i128 [ 0, [[DOTSPLIT_PREHEADER:%.*]] ]
 ; CHECK-NEXT:    switch i128 [[TMP0]], label [[END:%.*]] [
 ; CHECK-NEXT:      i128 -1, label [[END]]
 ; CHECK-NEXT:      i128 0, label [[DOTSPLIT_JT18446744073709551615:%.*]]
@@ -251,9 +249,6 @@ define void @pr78059_bitwidth(i1 %c) {
 ; CHECK:       end:
 ; CHECK-NEXT:    ret void
 ;
-entry:
-  br i1 %c, label %.split.preheader, label %.split.preheader
-
 .split.preheader:
   br label %.split
 
@@ -268,14 +263,12 @@ end:
   ret void
 }
 
-define void @self-reference(i1 %c) {
+define void @self-reference() {
 ; CHECK-LABEL: @self-reference(
-; CHECK-NEXT:  entry:
-; CHECK-NEXT:    br i1 [[C:%.*]], label [[DOTSPLIT_PREHEADER:%.*]], label [[DOTSPLIT_PREHEADER]]
-; CHECK:       .split.preheader:
+; CHECK-NEXT:  .split.preheader:
 ; CHECK-NEXT:    br label [[DOTSPLIT:%.*]]
 ; CHECK:       .split:
-; CHECK-NEXT:    [[TMP0:%.*]] = phi i32 [ 0, [[DOTSPLIT_PREHEADER]] ]
+; CHECK-NEXT:    [[TMP0:%.*]] = phi i32 [ 0, [[DOTSPLIT_PREHEADER:%.*]] ]
 ; CHECK-NEXT:    switch i32 [[TMP0]], label [[END:%.*]] [
 ; CHECK-NEXT:      i32 -1, label [[END]]
 ; CHECK-NEXT:      i32 0, label [[DOTSPLIT_JT4294967295:%.*]]
@@ -286,9 +279,6 @@ define void @self-reference(i1 %c) {
 ; CHECK:       end:
 ; CHECK-NEXT:    ret void
 ;
-entry:
-  br i1 %c, label %.split.preheader, label %.split.preheader
-
 .split.preheader:
   br label %.split