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: 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: 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