| Dan Gohman | 27dead4 | 2010-04-12 07:49:36 +0000 | [diff] [blame] | 1 | ; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s |
| 2 | |
| 3 | ; This loop has no preheader, multiple backedges, etc., but ScalarEvolution |
| 4 | ; should still be able to analyze it. |
| 5 | |
| 6 | ; CHECK: %i = phi i64 [ 5, %entry ], [ 5, %alt ], [ %i.next, %loop.a ], [ %i.next, %loop.b ] |
| 7 | ; CHECK-NEXT: --> {5,+,1}<%loop> |
| 8 | |
| 9 | define void @foo(i1 %p, i1 %q, i1 %s, i1 %u) { |
| 10 | entry: |
| 11 | br i1 %p, label %loop, label %alt |
| 12 | |
| 13 | alt: |
| 14 | br i1 %s, label %loop, label %exit |
| 15 | |
| 16 | loop: |
| 17 | %i = phi i64 [ 5, %entry ], [ 5, %alt ], [ %i.next, %loop.a ], [ %i.next, %loop.b ] |
| 18 | %i.next = add i64 %i, 1 |
| 19 | br i1 %q, label %loop.a, label %loop.b |
| 20 | |
| 21 | loop.a: |
| 22 | br label %loop |
| 23 | |
| 24 | loop.b: |
| 25 | br i1 %u, label %loop, label %exit |
| 26 | |
| 27 | exit: |
| 28 | ret void |
| 29 | } |