| ; RUN: llvm-as < %s | opt -jump-threading -simplifycfg -mem2reg | llvm-dis | grep {ret i32 %v1} |
| ; There should be no uncond branches left. |
| ; RUN: llvm-as < %s | opt -jump-threading -simplifycfg -mem2reg | llvm-dis | not grep {br label} |
| |
| declare i32 @f1() |
| declare i32 @f2() |
| declare void @f3() |
| |
| define i32 @test(i1 %cond) { |
| br i1 %cond, label %T1, label %F1 |
| |
| T1: |
| %v1 = call i32 @f1() |
| br label %Merge |
| |
| F1: |
| %v2 = call i32 @f2() |
| br label %Merge |
| |
| Merge: |
| %A = phi i1 [true, %T1], [false, %F1] |
| %B = phi i32 [%v1, %T1], [%v2, %F1] |
| br i1 %A, label %T2, label %F2 |
| |
| T2: |
| call void @f3() |
| ret i32 %B |
| |
| F2: |
| ret i32 %B |
| } |
| |
| |
| ;; cond is known false on Entry -> F1 edge! |
| define i32 @test2(i1 %cond) { |
| Entry: |
| br i1 %cond, label %T1, label %F1 |
| |
| T1: |
| %v1 = call i32 @f1() |
| br label %Merge |
| |
| F1: |
| br i1 %cond, label %Merge, label %F2 |
| |
| Merge: |
| %B = phi i32 [47, %T1], [192, %F1] |
| ret i32 %B |
| |
| F2: |
| call void @f3() |
| ret i32 12 |
| } |