| Evan Cheng | 9d17125 | 2009-10-14 06:41:49 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -aa-eval -print-all-alias-modref-info -disable-output |& grep {NoAlias:.*%P,.*@Z} |
| 2 | ; If GEP base doesn't alias Z, then GEP doesn't alias Z. |
| 3 | ; rdar://7282591 |
| 4 | |
| 5 | @Y = common global i32 0 |
| 6 | @Z = common global i32 0 |
| 7 | |
| 8 | define void @foo(i32 %cond) nounwind ssp { |
| 9 | entry: |
| 10 | %a = alloca i32 |
| 11 | %tmp = icmp ne i32 %cond, 0 |
| 12 | br i1 %tmp, label %bb, label %bb1 |
| 13 | |
| 14 | bb: |
| 15 | %b = getelementptr i32* %a, i32 0 |
| 16 | br label %bb2 |
| 17 | |
| 18 | bb1: |
| 19 | br label %bb2 |
| 20 | |
| 21 | bb2: |
| 22 | %P = phi i32* [ %b, %bb ], [ @Y, %bb1 ] |
| 23 | %tmp1 = load i32* @Z, align 4 |
| 24 | store i32 123, i32* %P, align 4 |
| 25 | %tmp2 = load i32* @Z, align 4 |
| 26 | br label %return |
| 27 | |
| 28 | return: |
| 29 | ret void |
| 30 | } |