Daniel Dunbar | b994d02 | 2009-09-05 11:35:16 +0000 | [diff] [blame] | 1 | ; RUN: opt -S -indvars %s | FileCheck %s |
Dan Gohman | f17a25c | 2007-07-18 16:29:46 +0000 | [diff] [blame] | 2 | |
| 3 | ; The indvar simplification code should ensure that the first PHI in the block |
| 4 | ; is the canonical one! |
| 5 | |
Tanya Lattner | 4c4d0b8 | 2008-03-01 09:15:35 +0000 | [diff] [blame] | 6 | define i32 @test() { |
| 7 | ; <label>:0 |
| 8 | br label %Loop |
Dan Gohman | f17a25c | 2007-07-18 16:29:46 +0000 | [diff] [blame] | 9 | |
Tanya Lattner | 4c4d0b8 | 2008-03-01 09:15:35 +0000 | [diff] [blame] | 10 | Loop: ; preds = %Loop, %0 |
Daniel Dunbar | b994d02 | 2009-09-05 11:35:16 +0000 | [diff] [blame] | 11 | ; CHECK: Loop: |
| 12 | ; CHECK-NEXT: Canonical |
Tanya Lattner | 4c4d0b8 | 2008-03-01 09:15:35 +0000 | [diff] [blame] | 13 | %NonIndvar = phi i32 [ 200, %0 ], [ %NonIndvarNext, %Loop ] ; <i32> [#uses=1] |
Dan Gohman | dd20dbb | 2009-04-28 22:03:26 +0000 | [diff] [blame] | 14 | %Canonical = phi i32 [ 0, %0 ], [ %CanonicalNext, %Loop ] ; <i32> [#uses=2] |
| 15 | store i32 %Canonical, i32* null |
Tanya Lattner | 4c4d0b8 | 2008-03-01 09:15:35 +0000 | [diff] [blame] | 16 | %NonIndvarNext = sdiv i32 %NonIndvar, 2 ; <i32> [#uses=1] |
| 17 | %CanonicalNext = add i32 %Canonical, 1 ; <i32> [#uses=1] |
| 18 | br label %Loop |
Dan Gohman | f17a25c | 2007-07-18 16:29:46 +0000 | [diff] [blame] | 19 | } |
| 20 | |