From 222e2a7620e6520ffaf4fc4e69d79c18da31542e Mon Sep 17 00:00:00 2001 From: "Zancanaro; Carlo" Date: Mon, 24 Sep 2012 09:58:17 +1000 Subject: Add the clang library to the repo (with some of my changes, too). --- clang/test/CodeGen/atomic_ops.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 clang/test/CodeGen/atomic_ops.c (limited to 'clang/test/CodeGen/atomic_ops.c') diff --git a/clang/test/CodeGen/atomic_ops.c b/clang/test/CodeGen/atomic_ops.c new file mode 100644 index 0000000..9a18c9e --- /dev/null +++ b/clang/test/CodeGen/atomic_ops.c @@ -0,0 +1,14 @@ +// RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s + +void foo(void) +{ + _Atomic(int) i = 0; + // Check that multiply / divides on atomics produce a cmpxchg loop + i *= 2; // CHECK: cmpxchg + i /= 2; // CHECK: cmpxchg + // 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 +} -- cgit v1.2.3