| Evan Cheng | c3f507f | 2011-01-29 04:46:23 +0000 | [diff] [blame^] | 1 | ; RUN: opt < %s -jump-threading -mem2reg -instcombine -simplifycfg -S | FileCheck %s |
| Chris Lattner | ae65b3c | 2008-04-22 20:46:09 +0000 | [diff] [blame] | 2 | |
| 3 | declare i32 @f1() |
| 4 | declare i32 @f2() |
| 5 | declare void @f3() |
| 6 | |
| 7 | define i32 @test(i1 %cond, i1 %cond2, i1 %cond3) { |
| Evan Cheng | c3f507f | 2011-01-29 04:46:23 +0000 | [diff] [blame^] | 8 | ; CHECK: test |
| Chris Lattner | ae65b3c | 2008-04-22 20:46:09 +0000 | [diff] [blame] | 9 | br i1 %cond, label %T1, label %F1 |
| 10 | |
| Evan Cheng | c3f507f | 2011-01-29 04:46:23 +0000 | [diff] [blame^] | 11 | ; CHECK-NOT: T1: |
| Chris Lattner | ae65b3c | 2008-04-22 20:46:09 +0000 | [diff] [blame] | 12 | T1: |
| 13 | %v1 = call i32 @f1() |
| 14 | br label %Merge |
| 15 | |
| 16 | F1: |
| 17 | %v2 = call i32 @f2() |
| 18 | br label %Merge |
| 19 | |
| 20 | Merge: |
| Evan Cheng | c3f507f | 2011-01-29 04:46:23 +0000 | [diff] [blame^] | 21 | ; CHECK: Merge: |
| 22 | ; CHECK: %v1 = call i32 @f1() |
| 23 | ; CHECK-NEXT: %D = and i1 %cond2, %cond3 |
| 24 | ; CHECK-NEXT: br i1 %D |
| Chris Lattner | ae65b3c | 2008-04-22 20:46:09 +0000 | [diff] [blame] | 25 | %A = phi i1 [true, %T1], [false, %F1] |
| 26 | %B = phi i32 [%v1, %T1], [%v2, %F1] |
| 27 | %C = and i1 %A, %cond2 |
| 28 | %D = and i1 %C, %cond3 |
| 29 | br i1 %D, label %T2, label %F2 |
| 30 | |
| 31 | T2: |
| 32 | call void @f3() |
| 33 | ret i32 %B |
| 34 | |
| 35 | F2: |
| 36 | ret i32 %B |
| 37 | } |