| Nadav Rotem | 5d4e205 | 2012-08-13 23:03:43 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -basicaa -dse -S | FileCheck %s |
| 2 | |
| 3 | target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" |
| 4 | target triple = "x86_64-apple-macosx10.8.0" |
| 5 | |
| 6 | %struct.anon = type { i32, i32, i32 } |
| 7 | @b = global %struct.anon { i32 1, i32 0, i32 0 }, align 4 |
| 8 | @c = common global i32 0, align 4 |
| 9 | @a = common global %struct.anon zeroinitializer, align 4 |
| 10 | @.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1 |
| 11 | |
| 12 | declare i32 @printf(i8* nocapture, ...) nounwind |
| 13 | declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind |
| 14 | |
| 15 | |
| 16 | ; Make sure that the initial memcpy call does not go away |
| 17 | ; because the volatile load is in the way. PR12899 |
| 18 | |
| 19 | ; CHECK: main_entry: |
| 20 | ; CHECK-NEXT: tail call void @llvm.memcpy.p0i8.p0i8.i64 |
| 21 | |
| 22 | define i32 @main() nounwind uwtable ssp { |
| 23 | main_entry: |
| 24 | tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* bitcast (%struct.anon* @b to i8*), i8* bitcast (%struct.anon* @a to i8*), i64 12, i32 4, i1 false) |
| 25 | %0 = load volatile i32* getelementptr inbounds (%struct.anon* @b, i64 0, i32 0), align 4, !tbaa !0 |
| 26 | store i32 %0, i32* @c, align 4, !tbaa !0 |
| 27 | tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* bitcast (%struct.anon* @b to i8*), i8* bitcast (%struct.anon* @a to i8*), i64 12, i32 4, i1 false) nounwind |
| 28 | %call = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([4 x i8]* @.str, i64 0, i64 0), i32 %0) nounwind |
| 29 | ret i32 0 |
| 30 | } |
| 31 | |
| 32 | !0 = metadata !{metadata !"int", metadata !1} |
| 33 | !1 = metadata !{metadata !"omnipotent char", metadata !2} |
| 34 | !2 = metadata !{metadata !"Simple C/C++ TBAA"} |