1 ; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
2 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
3 target triple = "x86_64-unknown-linux-gnu"
7 @X = common global i32 0
8 @Y = common global i32 0
9 @Z = common global i32 0
12 ; CHECK: NoAlias: i32* %P, i32* @Z
14 define void @foo(i32 %cond) nounwind {
16 %"alloca point" = bitcast i32 0 to i32
17 %tmp = icmp ne i32 %cond, 0
18 br i1 %tmp, label %bb, label %bb1
27 %P = phi i32* [ @X, %bb ], [ @Y, %bb1 ]
28 %tmp1 = load i32* @Z, align 4
29 store i32 123, i32* %P, align 4
30 %tmp2 = load i32* @Z, align 4
37 ; Pointers can vary in between iterations of loops.
40 ; CHECK-LABEL: pr18068
41 ; CHECK: MayAlias: i32* %0, i32* %arrayidx5
42 ; CHECK: NoAlias: i32* %arrayidx13, i32* %arrayidx5
44 define i32 @pr18068(i32* %jj7, i32* %j) {
46 %oa5 = alloca [100 x i32], align 16
50 %0 = phi i32* [ %arrayidx13, %for.body ], [ %j, %entry ]
51 %targetBlock = call i1 @cond(i32* %jj7)
52 br i1 %targetBlock, label %for.body, label %bye
55 %1 = load i32* %jj7, align 4
56 %idxprom4 = zext i32 %1 to i64
57 %arrayidx5 = getelementptr inbounds [100 x i32]* %oa5, i64 0, i64 %idxprom4
58 %2 = load i32* %arrayidx5, align 4
60 store i32 %sub6, i32* %arrayidx5, align 4
61 ; %0 and %arrayidx5 can alias! It is not safe to DSE the above store.
62 %3 = load i32* %0, align 4
63 store i32 %3, i32* %arrayidx5, align 4
64 %sub11 = add i32 %1, -1
65 %idxprom12 = zext i32 %sub11 to i64
66 %arrayidx13 = getelementptr inbounds [100 x i32]* %oa5, i64 0, i64 %idxprom12
67 call void @inc(i32* %jj7)
71 %.reload = load i32* %jj7, align 4
75 declare i1 @cond(i32*)
77 declare void @inc(i32*)