1; RUN: opt -basicaa -sroa -loop-rotate -licm -S < %s | FileCheck %s
2; RUN: opt -basicaa -sroa -loop-rotate %s | opt -aa-pipeline=basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,loop(licm)' -S | FileCheck %s
3; The objects *p and *q are aliased to each other, but even though *q is
4; volatile, *p can be considered invariant in the loop. Check if it is moved
5; out of the loop.
6; CHECK: load i32, i32* %p
7; CHECK: for.body:
8; CHECK: load volatile i32, i32* %q
9
10target 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"
11
12; Function Attrs: nounwind uwtable
13define i32 @foo(i32* dereferenceable(4) nonnull %p, i32* %q, i32 %n) #0 {
14entry:
15  %p.addr = alloca i32*, align 8
16  %q.addr = alloca i32*, align 8
17  %n.addr = alloca i32, align 4
18  %i = alloca i32, align 4
19  %s = alloca i32, align 4
20  store i32* %p, i32** %p.addr, align 8
21  store i32* %q, i32** %q.addr, align 8
22  store i32 %n, i32* %n.addr, align 4
23  store i32 0, i32* %s, align 4
24  store i32 0, i32* %i, align 4
25  br label %for.cond
26
27for.cond:                                         ; preds = %for.inc, %entry
28  %0 = load i32, i32* %i, align 4
29  %1 = load i32, i32* %n.addr, align 4
30  %cmp = icmp slt i32 %0, %1
31  br i1 %cmp, label %for.body, label %for.end
32
33for.body:                                         ; preds = %for.cond
34  %2 = load i32*, i32** %p.addr, align 8
35  %3 = load i32, i32* %2, align 4
36  %4 = load i32*, i32** %q.addr, align 8
37  %5 = load volatile i32, i32* %4, align 4
38  %add = add nsw i32 %3, %5
39  %6 = load i32, i32* %s, align 4
40  %add1 = add nsw i32 %6, %add
41  store i32 %add1, i32* %s, align 4
42  br label %for.inc
43
44for.inc:                                          ; preds = %for.body
45  %7 = load i32, i32* %i, align 4
46  %inc = add nsw i32 %7, 1
47  store i32 %inc, i32* %i, align 4
48  br label %for.cond
49
50for.end:                                          ; preds = %for.cond
51  %8 = load i32, i32* %s, align 4
52  ret i32 %8
53}
54
55attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
56