1; ModuleID = 'PR1657.bc'
2; Do not promote getelementptr because it may exposes load from a null pointer
3; and store from a null pointer  which are covered by
4; icmp eq %struct.decision* null, null condition.
5; RUN: opt < %s -licm -S | not grep promoted
6	%struct.decision = type { i8, %struct.decision* }
7
8define i32 @main() {
9entry:
10	br label %blah.i
11
12blah.i:		; preds = %cond_true.i, %entry
13	%tmp3.i = icmp eq %struct.decision* null, null		; <i1> [#uses=1]
14	br i1 %tmp3.i, label %clear_modes.exit, label %cond_true.i
15
16cond_true.i:		; preds = %blah.i
17	%tmp1.i = getelementptr %struct.decision* null, i32 0, i32 0		; <i8*> [#uses=1]
18	store i8 0, i8* %tmp1.i
19	br label %blah.i
20
21clear_modes.exit:		; preds = %blah.i
22	call void @exit( i32 0 )
23	unreachable
24}
25
26define i32 @f(i8* %ptr) {
27entry:
28        br label %loop.head
29
30loop.head:              ; preds = %cond.true, %entry
31        %x = phi i8* [ %ptr, %entry ], [ %ptr.i, %cond.true ]           ; <i8*> [#uses=1]
32        %tmp3.i = icmp ne i8* %ptr, %x          ; <i1> [#uses=1]
33        br i1 %tmp3.i, label %cond.true, label %exit
34
35cond.true:              ; preds = %loop.head
36        %ptr.i = getelementptr i8* %ptr, i32 0          ; <i8*> [#uses=2]
37        store i8 0, i8* %ptr.i
38        br label %loop.head
39
40exit:           ; preds = %loop.head
41        ret i32 0
42}
43
44define i32 @f2(i8* %p, i8* %q) {
45entry:
46        br label %loop.head
47
48loop.head:              ; preds = %cond.true, %entry
49        %tmp3.i = icmp eq i8* null, %q            ; <i1> [#uses=1]
50        br i1 %tmp3.i, label %exit, label %cond.true
51
52cond.true:              ; preds = %loop.head
53        %ptr.i = getelementptr i8* %p, i32 0          ; <i8*> [#uses=2]
54        store i8 0, i8* %ptr.i
55        br label %loop.head
56
57exit:           ; preds = %loop.head
58        ret i32 0
59}
60
61declare void @exit(i32)
62