1 ; RUN: opt -S -basicaa -gvn -enable-load-pre < %s | FileCheck %s
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;
10 ; outbuf[outcnt] = bi_buf;
12 target 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"
13 target triple = "i386-apple-darwin7"
14 @outcnt = common global i32 0 ; <i32*> [#uses=3]
16 define void @bi_windup(i8* %outbuf, i8 zeroext %bi_buf) nounwind {
18 %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
19 %0 = load i32, i32* @outcnt, align 4 ; <i32> [#uses=1]
20 %1 = getelementptr i8, i8* %outbuf, i32 %0 ; <i8*> [#uses=1]
21 store i8 %bi_buf, i8* %1, align 1
22 %2 = load i32, 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
27 call void @flush_outbuf() nounwind
30 bb1: ; preds = %bb, %entry
33 ; CHECK-NEXT: getelementptr
34 %4 = load i32, i32* @outcnt, align 4 ; <i32> [#uses=1]
35 %5 = getelementptr i8, i8* %outbuf, i32 %4 ; <i8*> [#uses=1]
36 store i8 %bi_buf, i8* %5, align 1
40 declare void @flush_outbuf()