1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
| ; RUN: opt < %s -basicaa -globals-aa -S -licm | FileCheck %s
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.10.0"
@b = common global i32 0, align 4
@c = internal global i32 0, align 4
@d = common global i32 0, align 4
@e = common global i32* null, align 4
define void @foo(i32* %P) noinline {
; CHECK: define void @foo
%loadp = load i32, i32* %P, align 4
store i32 %loadp, i32* @d, align 4
ret void
}
define void @bar() noinline {
; CHECK: define void @bar
%loadp = load i32, i32* @d, align 4
store i32 %loadp, i32* @c, align 4
ret void
}
define i32 @main() {
entry:
%retval = alloca i32, align 4
%c = alloca [1 x i32], align 4
store i32 0, i32* %retval, align 4
call void @bar()
store i32 0, i32* @b, align 4
br label %for.cond
;; Check that @c is LICM'ed out.
; CHECK: load i32, i32* @c
for.cond: ; preds = %for.inc, %entry
; CHECK-LABEL: for.cond:
; CHECK: load i32, i32* @b
%a1 = load i32, i32* @b, align 4
%aa2 = load i32, i32* @c, align 4
%add = add nsw i32 %a1, %aa2
%p1 = load i32*, i32** @e, align 4
call void @foo(i32* %p1)
%cmp = icmp slt i32 %add, 3
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%a2 = load i32, i32* @b, align 4
%idxprom = sext i32 %a2 to i64
br label %for.inc
for.inc: ; preds = %for.body
%a3 = load i32, i32* @b, align 4
%inc = add nsw i32 %a3, 1
store i32 %inc, i32* @b, align 4
br label %for.cond
for.end: ; preds = %for.cond
ret i32 0
}
; Function Attrs: nounwind argmemonly
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) nounwind argmemonly
; Function Attrs: noreturn nounwind
declare void @abort() noreturn nounwind
|