| Dan Gohman | 2b110ca | 2009-10-24 23:23:04 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -jump-threading -loop-rotate -instcombine -indvars -loop-unroll -simplifycfg -S -verify-dom-info -verify-loop-info > %t |
| Chandler Carruth | 4177e6f | 2012-07-02 12:47:22 +0000 | [diff] [blame] | 2 | ; RUN: grep "store volatile" %t | count 3 |
| 3 | ; RUN: not grep "br label" %t |
| Mike Stump | fe095f3 | 2009-05-04 18:40:41 +0000 | [diff] [blame] | 4 | |
| 5 | ; Jump threading should not prevent this loop from being unrolled. |
| 6 | |
| 7 | target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" |
| 8 | target triple = "i386-apple-darwin9.6" |
| 9 | @v1 = external global i32 ; <i32*> [#uses=2] |
| 10 | |
| 11 | define i32 @unroll() nounwind { |
| 12 | entry: |
| 13 | br label %bb4 |
| 14 | |
| 15 | bb: ; preds = %bb4 |
| 16 | %0 = icmp eq i32 %i.0, 0 ; <i1> [#uses=1] |
| 17 | br i1 %0, label %bb1, label %bb2 |
| 18 | |
| 19 | bb1: ; preds = %bb |
| Chris Lattner | d2bf432 | 2011-11-27 06:54:59 +0000 | [diff] [blame] | 20 | store volatile i32 1000, i32* @v1, align 4 |
| Mike Stump | fe095f3 | 2009-05-04 18:40:41 +0000 | [diff] [blame] | 21 | br label %bb3 |
| 22 | |
| 23 | bb2: ; preds = %bb |
| Chris Lattner | d2bf432 | 2011-11-27 06:54:59 +0000 | [diff] [blame] | 24 | store volatile i32 1001, i32* @v1, align 4 |
| Mike Stump | fe095f3 | 2009-05-04 18:40:41 +0000 | [diff] [blame] | 25 | br label %bb3 |
| 26 | |
| 27 | bb3: ; preds = %bb2, %bb1 |
| 28 | %1 = add i32 %i.0, 1 ; <i32> [#uses=1] |
| 29 | br label %bb4 |
| 30 | |
| 31 | bb4: ; preds = %bb3, %entry |
| 32 | %i.0 = phi i32 [ 0, %entry ], [ %1, %bb3 ] ; <i32> [#uses=3] |
| 33 | %2 = icmp sgt i32 %i.0, 2 ; <i1> [#uses=1] |
| 34 | br i1 %2, label %bb5, label %bb |
| 35 | |
| 36 | bb5: ; preds = %bb4 |
| 37 | ret i32 0 |
| 38 | } |