1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -basicaa -dse -S | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker 3*9880d681SAndroid Build Coastguard Workertarget 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*9880d681SAndroid Build Coastguard Workertarget triple = "x86_64-apple-macosx10.8.0" 5*9880d681SAndroid Build Coastguard Worker 6*9880d681SAndroid Build Coastguard Worker%struct.anon = type { i32, i32, i32 } 7*9880d681SAndroid Build Coastguard Worker@b = global %struct.anon { i32 1, i32 0, i32 0 }, align 4 8*9880d681SAndroid Build Coastguard Worker@c = common global i32 0, align 4 9*9880d681SAndroid Build Coastguard Worker@a = common global %struct.anon zeroinitializer, align 4 10*9880d681SAndroid Build Coastguard Worker@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1 11*9880d681SAndroid Build Coastguard Worker 12*9880d681SAndroid Build Coastguard Workerdeclare i32 @printf(i8* nocapture, ...) nounwind 13*9880d681SAndroid Build Coastguard Workerdeclare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind 14*9880d681SAndroid Build Coastguard Worker 15*9880d681SAndroid Build Coastguard Worker 16*9880d681SAndroid Build Coastguard Worker; Make sure that the initial memcpy call does not go away 17*9880d681SAndroid Build Coastguard Worker; because the volatile load is in the way. PR12899 18*9880d681SAndroid Build Coastguard Worker 19*9880d681SAndroid Build Coastguard Worker; CHECK: main_entry: 20*9880d681SAndroid Build Coastguard Worker; CHECK-NEXT: tail call void @llvm.memcpy.p0i8.p0i8.i64 21*9880d681SAndroid Build Coastguard Worker 22*9880d681SAndroid Build Coastguard Workerdefine i32 @main() nounwind uwtable ssp { 23*9880d681SAndroid Build Coastguard Workermain_entry: 24*9880d681SAndroid Build Coastguard Worker 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*9880d681SAndroid Build Coastguard Worker %0 = load volatile i32, i32* getelementptr inbounds (%struct.anon, %struct.anon* @b, i64 0, i32 0), align 4 26*9880d681SAndroid Build Coastguard Worker store i32 %0, i32* @c, align 4 27*9880d681SAndroid Build Coastguard Worker 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*9880d681SAndroid Build Coastguard Worker %call = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %0) nounwind 29*9880d681SAndroid Build Coastguard Worker ret i32 0 30*9880d681SAndroid Build Coastguard Worker} 31