| ; RUN: opt < %s -basic-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s |
| |
| 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" |
| |
| ; Check that geps with equal base offsets of noalias base pointers stay noalias. |
| define i32 @test(i32* %p, i16 %i) { |
| ; CHECK-LABEL: Function: test: |
| %pi = getelementptr i32, i32* %p, i32 0 |
| %pi.next = getelementptr i32, i32* %p, i32 1 |
| %b = icmp eq i16 %i, 0 |
| br i1 %b, label %bb1, label %bb2 |
| |
| bb1: |
| %f = getelementptr i32, i32* %pi, i32 1 |
| %g = getelementptr i32, i32* %pi.next, i32 1 |
| br label %bb3 |
| bb2: |
| %f2 = getelementptr i32, i32* %pi, i32 1 |
| %g2 = getelementptr i32, i32* %pi.next, i32 1 |
| br label %bb3 |
| |
| bb3: |
| %ptr_phi = phi i32* [ %f, %bb1 ], [ %f2, %bb2 ] |
| %ptr_phi2 = phi i32* [ %g, %bb1 ], [ %g2, %bb2 ] |
| ; CHECK: NoAlias: i32* %f1, i32* %g1 |
| %f1 = getelementptr i32, i32* %ptr_phi , i32 1 |
| %g1 = getelementptr i32, i32* %ptr_phi2 , i32 1 |
| ; This should also work if the access size is not the same. |
| ; CHECK: NoAlias: i16* %h1, i32* %f1 |
| %h1 = bitcast i32* %g1 to i16* |
| |
| ret i32 0 |
| } |
| |
| ; Check that geps with equal indices of noalias base pointers stay noalias. |
| define i32 @test2([2 x i32]* %p, i32 %i) { |
| ; CHECK-LABEL: Function: test2: |
| %pi = getelementptr [2 x i32], [2 x i32]* %p, i32 0 |
| %pi.next = getelementptr [2 x i32], [2 x i32]* %p, i32 1 |
| %b = icmp eq i32 %i, 0 |
| br i1 %b, label %bb1, label %bb2 |
| |
| bb1: |
| %f = getelementptr [2 x i32], [2 x i32]* %pi, i32 1 |
| %g = getelementptr [2 x i32], [2 x i32]* %pi.next, i32 1 |
| br label %bb3 |
| bb2: |
| %f2 = getelementptr [2 x i32], [2 x i32]* %pi, i32 1 |
| %g2 = getelementptr [2 x i32], [2 x i32]* %pi.next, i32 1 |
| br label %bb3 |
| bb3: |
| %ptr_phi = phi [2 x i32]* [ %f, %bb1 ], [ %f2, %bb2 ] |
| %ptr_phi2 = phi [2 x i32]* [ %g, %bb1 ], [ %g2, %bb2 ] |
| ; CHECK: NoAlias: i32* %f1, i32* %g1 |
| %f1 = getelementptr [2 x i32], [2 x i32]* %ptr_phi , i32 1, i32 %i |
| %g1 = getelementptr [2 x i32], [2 x i32]* %ptr_phi2 , i32 1, i32 %i |
| |
| ret i32 0 |
| } |