1// RUN: %clang_cc1 -triple x86_64 -emit-llvm -o - %s | FileCheck %s
2
3// Check that we don't generate unnecessary reloads.
4//
5// CHECK-LABEL: define void @f0()
6// CHECK:      [[x_0:%.*]] = alloca i32, align 4
7// CHECK-NEXT: [[y_0:%.*]] = alloca i32, align 4
8// CHECK-NEXT: store i32 1, i32* [[x_0]]
9// CHECK-NEXT: store i32 1, i32* [[x_0]]
10// CHECK-NEXT: store i32 1, i32* [[y_0]]
11// CHECK: }
12void f0() {
13  int x, y;
14  x = 1;
15  y = (x = 1);
16}
17
18// This used to test that we generate reloads for volatile access,
19// but that does not appear to be correct behavior for C.
20//
21// CHECK-LABEL: define void @f1()
22// CHECK:      [[x_1:%.*]] = alloca i32, align 4
23// CHECK-NEXT: [[y_1:%.*]] = alloca i32, align 4
24// CHECK-NEXT: store volatile i32 1, i32* [[x_1]]
25// CHECK-NEXT: store volatile i32 1, i32* [[x_1]]
26// CHECK-NEXT: store volatile i32 1, i32* [[y_1]]
27// CHECK: }
28void f1() {
29  volatile int x, y;
30  x = 1;
31  y = (x = 1);
32}
33