| Arnold Schwaighofer | 76dca58 | 2012-09-06 14:31:51 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s |
| 2 | |
| 3 | 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" |
| 4 | |
| 5 | ; Check that geps with equal base offsets of noalias base pointers stay noalias. |
| 6 | define i32 @test(i32* %p, i16 %i) { |
| Matt Arsenault | 21981a1 | 2013-09-30 23:31:55 +0000 | [diff] [blame] | 7 | ; CHECK-LABEL: Function: test: |
| David Blaikie | 79e6c74 | 2015-02-27 19:29:02 +0000 | [diff] [blame] | 8 | %pi = getelementptr i32, i32* %p, i32 0 |
| 9 | %pi.next = getelementptr i32, i32* %p, i32 1 |
| Arnold Schwaighofer | 76dca58 | 2012-09-06 14:31:51 +0000 | [diff] [blame] | 10 | %b = icmp eq i16 %i, 0 |
| 11 | br i1 %b, label %bb1, label %bb2 |
| 12 | |
| 13 | bb1: |
| David Blaikie | 79e6c74 | 2015-02-27 19:29:02 +0000 | [diff] [blame] | 14 | %f = getelementptr i32, i32* %pi, i32 1 |
| 15 | %g = getelementptr i32, i32* %pi.next, i32 1 |
| Arnold Schwaighofer | 76dca58 | 2012-09-06 14:31:51 +0000 | [diff] [blame] | 16 | br label %bb3 |
| 17 | bb2: |
| David Blaikie | 79e6c74 | 2015-02-27 19:29:02 +0000 | [diff] [blame] | 18 | %f2 = getelementptr i32, i32* %pi, i32 1 |
| 19 | %g2 = getelementptr i32, i32* %pi.next, i32 1 |
| Arnold Schwaighofer | 76dca58 | 2012-09-06 14:31:51 +0000 | [diff] [blame] | 20 | br label %bb3 |
| 21 | |
| 22 | bb3: |
| 23 | %ptr_phi = phi i32* [ %f, %bb1 ], [ %f2, %bb2 ] |
| 24 | %ptr_phi2 = phi i32* [ %g, %bb1 ], [ %g2, %bb2 ] |
| 25 | ; CHECK: NoAlias: i32* %f1, i32* %g1 |
| David Blaikie | 79e6c74 | 2015-02-27 19:29:02 +0000 | [diff] [blame] | 26 | %f1 = getelementptr i32, i32* %ptr_phi , i32 1 |
| 27 | %g1 = getelementptr i32, i32* %ptr_phi2 , i32 1 |
| Arnold Schwaighofer | 76dca58 | 2012-09-06 14:31:51 +0000 | [diff] [blame] | 28 | |
| 29 | ret i32 0 |
| 30 | } |
| 31 | |
| 32 | ; Check that geps with equal indices of noalias base pointers stay noalias. |
| 33 | define i32 @test2([2 x i32]* %p, i32 %i) { |
| Matt Arsenault | 21981a1 | 2013-09-30 23:31:55 +0000 | [diff] [blame] | 34 | ; CHECK-LABEL: Function: test2: |
| David Blaikie | 79e6c74 | 2015-02-27 19:29:02 +0000 | [diff] [blame] | 35 | %pi = getelementptr [2 x i32], [2 x i32]* %p, i32 0 |
| 36 | %pi.next = getelementptr [2 x i32], [2 x i32]* %p, i32 1 |
| Arnold Schwaighofer | 76dca58 | 2012-09-06 14:31:51 +0000 | [diff] [blame] | 37 | %b = icmp eq i32 %i, 0 |
| 38 | br i1 %b, label %bb1, label %bb2 |
| 39 | |
| 40 | bb1: |
| David Blaikie | 79e6c74 | 2015-02-27 19:29:02 +0000 | [diff] [blame] | 41 | %f = getelementptr [2 x i32], [2 x i32]* %pi, i32 1 |
| 42 | %g = getelementptr [2 x i32], [2 x i32]* %pi.next, i32 1 |
| Arnold Schwaighofer | 76dca58 | 2012-09-06 14:31:51 +0000 | [diff] [blame] | 43 | br label %bb3 |
| 44 | bb2: |
| David Blaikie | 79e6c74 | 2015-02-27 19:29:02 +0000 | [diff] [blame] | 45 | %f2 = getelementptr [2 x i32], [2 x i32]* %pi, i32 1 |
| 46 | %g2 = getelementptr [2 x i32], [2 x i32]* %pi.next, i32 1 |
| Arnold Schwaighofer | 76dca58 | 2012-09-06 14:31:51 +0000 | [diff] [blame] | 47 | br label %bb3 |
| 48 | bb3: |
| 49 | %ptr_phi = phi [2 x i32]* [ %f, %bb1 ], [ %f2, %bb2 ] |
| 50 | %ptr_phi2 = phi [2 x i32]* [ %g, %bb1 ], [ %g2, %bb2 ] |
| 51 | ; CHECK: NoAlias: i32* %f1, i32* %g1 |
| David Blaikie | 79e6c74 | 2015-02-27 19:29:02 +0000 | [diff] [blame] | 52 | %f1 = getelementptr [2 x i32], [2 x i32]* %ptr_phi , i32 1, i32 %i |
| 53 | %g1 = getelementptr [2 x i32], [2 x i32]* %ptr_phi2 , i32 1, i32 %i |
| Arnold Schwaighofer | 76dca58 | 2012-09-06 14:31:51 +0000 | [diff] [blame] | 54 | |
| 55 | ret i32 0 |
| 56 | } |