| // RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s |
| |
| void foo(int x) |
| { |
| _Atomic(int) i = 0; |
| _Atomic(short) j = 0; |
| // Check that multiply / divides on atomics produce a cmpxchg loop |
| i *= 2; |
| // CHECK: mul nsw i32 |
| // CHECK: cmpxchg i32* |
| i /= 2; |
| // CHECK: sdiv i32 |
| // CHECK: cmpxchg i32* |
| j /= x; |
| // CHECK: sdiv i32 |
| // CHECK: cmpxchg i16* |
| |
| // These should be emitting atomicrmw instructions, but they aren't yet |
| i += 2; // CHECK: cmpxchg |
| i -= 2; // CHECK: cmpxchg |
| i++; // CHECK: cmpxchg |
| i--; // CHECK: cmpxchg |
| } |
