| David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s |
| 2 | |
| Eli Friedman | 860a319 | 2012-06-16 02:19:17 +0000 | [diff] [blame] | 3 | void foo(int x) |
| David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 4 | { |
| 5 | _Atomic(int) i = 0; |
| Eli Friedman | 860a319 | 2012-06-16 02:19:17 +0000 | [diff] [blame] | 6 | _Atomic(short) j = 0; |
| David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 7 | // Check that multiply / divides on atomics produce a cmpxchg loop |
| Eli Friedman | 860a319 | 2012-06-16 02:19:17 +0000 | [diff] [blame] | 8 | i *= 2; |
| 9 | // CHECK: mul nsw i32 |
| 10 | // CHECK: cmpxchg i32* |
| 11 | i /= 2; |
| 12 | // CHECK: sdiv i32 |
| 13 | // CHECK: cmpxchg i32* |
| 14 | j /= x; |
| 15 | // CHECK: sdiv i32 |
| 16 | // CHECK: cmpxchg i16* |
| 17 | |
| David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 18 | // These should be emitting atomicrmw instructions, but they aren't yet |
| 19 | i += 2; // CHECK: cmpxchg |
| 20 | i -= 2; // CHECK: cmpxchg |
| 21 | i++; // CHECK: cmpxchg |
| 22 | i--; // CHECK: cmpxchg |
| 23 | } |