| Manman Ren | 554da1a | 2012-09-20 22:37:36 +0000 | [diff] [blame^] | 1 | ; RUN: opt < %s -simplifycfg -S | FileCheck %s |
| 2 | |
| 3 | define zeroext i1 @test1(i1 zeroext %flag, i32 %blksA, i32 %blksB, i32 %nblks) { |
| 4 | entry: |
| 5 | br i1 %flag, label %if.then, label %if.else |
| 6 | |
| 7 | ; CHECK: test1 |
| 8 | ; CHECK: add |
| 9 | ; CHECK: select |
| 10 | ; CHECK: icmp |
| 11 | ; CHECK-NOT: br |
| 12 | if.then: |
| 13 | %cmp = icmp uge i32 %blksA, %nblks |
| 14 | %frombool1 = zext i1 %cmp to i8 |
| 15 | br label %if.end |
| 16 | |
| 17 | if.else: |
| 18 | %add = add i32 %nblks, %blksB |
| 19 | %cmp2 = icmp ule i32 %add, %blksA |
| 20 | %frombool3 = zext i1 %cmp2 to i8 |
| 21 | br label %if.end |
| 22 | |
| 23 | if.end: |
| 24 | %obeys.0 = phi i8 [ %frombool1, %if.then ], [ %frombool3, %if.else ] |
| 25 | %tobool4 = icmp ne i8 %obeys.0, 0 |
| 26 | ret i1 %tobool4 |
| 27 | } |
| 28 | |
| 29 | define zeroext i1 @test2(i1 zeroext %flag, i32 %blksA, i32 %blksB, i32 %nblks) { |
| 30 | entry: |
| 31 | br i1 %flag, label %if.then, label %if.else |
| 32 | |
| 33 | ; CHECK: test2 |
| 34 | ; CHECK: add |
| 35 | ; CHECK: select |
| 36 | ; CHECK: icmp |
| 37 | ; CHECK-NOT: br |
| 38 | if.then: |
| 39 | %cmp = icmp uge i32 %blksA, %nblks |
| 40 | %frombool1 = zext i1 %cmp to i8 |
| 41 | br label %if.end |
| 42 | |
| 43 | if.else: |
| 44 | %add = add i32 %nblks, %blksB |
| 45 | %cmp2 = icmp uge i32 %blksA, %add |
| 46 | %frombool3 = zext i1 %cmp2 to i8 |
| 47 | br label %if.end |
| 48 | |
| 49 | if.end: |
| 50 | %obeys.0 = phi i8 [ %frombool1, %if.then ], [ %frombool3, %if.else ] |
| 51 | %tobool4 = icmp ne i8 %obeys.0, 0 |
| 52 | ret i1 %tobool4 |
| 53 | } |