1; RUN: opt -S -basicaa -gvn -enable-load-pre < %s | FileCheck %s
2;
3; The partially redundant load in bb1 should be hoisted to "bb".  This comes
4; from this C code (GCC PR 23455):
5;   unsigned outcnt;  extern void flush_outbuf(void);
6;   void bi_windup(unsigned char *outbuf, unsigned char bi_buf) {
7;     outbuf[outcnt] = bi_buf;
8;     if (outcnt == 16384)
9;       flush_outbuf();
10;     outbuf[outcnt] = bi_buf;
11;   }
12target 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-f80:128:128"
13target triple = "i386-apple-darwin7"
14@outcnt = common global i32 0		; <i32*> [#uses=3]
15
16define void @bi_windup(i8* %outbuf, i8 zeroext %bi_buf) nounwind {
17entry:
18	%"alloca point" = bitcast i32 0 to i32		; <i32> [#uses=0]
19	%0 = load i32* @outcnt, align 4		; <i32> [#uses=1]
20	%1 = getelementptr i8* %outbuf, i32 %0		; <i8*> [#uses=1]
21	store i8 %bi_buf, i8* %1, align 1
22	%2 = load i32* @outcnt, align 4		; <i32> [#uses=1]
23	%3 = icmp eq i32 %2, 16384		; <i1> [#uses=1]
24	br i1 %3, label %bb, label %bb1
25
26bb:		; preds = %entry
27	call void @flush_outbuf() nounwind
28	br label %bb1
29
30bb1:		; preds = %bb, %entry
31; CHECK: bb1:
32; CHECK-NEXT: phi
33; CHECK-NEXT: getelementptr
34	%4 = load i32* @outcnt, align 4		; <i32> [#uses=1]
35	%5 = getelementptr i8* %outbuf, i32 %4		; <i8*> [#uses=1]
36	store i8 %bi_buf, i8* %5, align 1
37	ret void
38}
39
40declare void @flush_outbuf()
41