| // RUN: %clang_cc1 -triple x86_64 -emit-llvm -o - %s | FileCheck %s |
| |
| // Check that we don't generate unnecessary reloads. |
| // |
| // CHECK-LABEL: define void @f0() |
| // CHECK: [[x_0:%.*]] = alloca i32, align 4 |
| // CHECK-NEXT: [[y_0:%.*]] = alloca i32, align 4 |
| // CHECK-NEXT: store i32 1, i32* [[x_0]] |
| // CHECK-NEXT: store i32 1, i32* [[x_0]] |
| // CHECK-NEXT: store i32 1, i32* [[y_0]] |
| // CHECK: } |
| void f0() { |
| int x, y; |
| x = 1; |
| y = (x = 1); |
| } |
| |
| // This used to test that we generate reloads for volatile access, |
| // but that does not appear to be correct behavior for C. |
| // |
| // CHECK-LABEL: define void @f1() |
| // CHECK: [[x_1:%.*]] = alloca i32, align 4 |
| // CHECK-NEXT: [[y_1:%.*]] = alloca i32, align 4 |
| // CHECK-NEXT: store volatile i32 1, i32* [[x_1]] |
| // CHECK-NEXT: store volatile i32 1, i32* [[x_1]] |
| // CHECK-NEXT: store volatile i32 1, i32* [[y_1]] |
| // CHECK: } |
| void f1() { |
| volatile int x, y; |
| x = 1; |
| y = (x = 1); |
| } |
