1; RUN: opt < %s -O3 -S | grep volatile | count 3
2; PR1520
3; Don't promote load volatiles/stores. This is really needed to handle setjmp/lonjmp properly.
4
5target 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-f80:32:32"
6target triple = "i686-pc-linux-gnu"
7	%struct.__jmp_buf_tag = type { [6 x i32], i32, %struct.__sigset_t }
8	%struct.__sigset_t = type { [32 x i32] }
9@j = external global [1 x %struct.__jmp_buf_tag]		; <[1 x %struct.__jmp_buf_tag]*> [#uses=1]
10
11define i32 @f() {
12entry:
13	%retval = alloca i32, align 4		; <i32*> [#uses=2]
14	%v = alloca i32, align 4		; <i32*> [#uses=3]
15	%tmp = alloca i32, align 4		; <i32*> [#uses=3]
16	%"alloca point" = bitcast i32 0 to i32		; <i32> [#uses=0]
17	store volatile i32 0, i32* %v, align 4
18	%tmp1 = call i32 @_setjmp( %struct.__jmp_buf_tag* getelementptr ([1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* @j, i32 0, i32 0) )		; <i32> [#uses=1]
19	%tmp2 = icmp ne i32 %tmp1, 0		; <i1> [#uses=1]
20	%tmp23 = zext i1 %tmp2 to i8		; <i8> [#uses=1]
21	%toBool = icmp ne i8 %tmp23, 0		; <i1> [#uses=1]
22	br i1 %toBool, label %bb, label %bb5
23
24bb:		; preds = %entry
25	%tmp4 = load volatile i32, i32* %v, align 4		; <i32> [#uses=1]
26	store i32 %tmp4, i32* %tmp, align 4
27	br label %bb6
28
29bb5:		; preds = %entry
30	store volatile i32 1, i32* %v, align 4
31	call void @g( )
32	store i32 0, i32* %tmp, align 4
33	br label %bb6
34
35bb6:		; preds = %bb5, %bb
36	%tmp7 = load i32, i32* %tmp, align 4		; <i32> [#uses=1]
37	store i32 %tmp7, i32* %retval, align 4
38	br label %return
39
40return:		; preds = %bb6
41	%retval8 = load i32, i32* %retval		; <i32> [#uses=1]
42	ret i32 %retval8
43}
44
45declare i32 @_setjmp(%struct.__jmp_buf_tag*) returns_twice
46
47declare void @g()
48