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clang
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test
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CodeGen
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2010-01-13-MemBarrier.c
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// RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s
typedef
unsigned
__INT32_TYPE__
uint32_t
;
unsigned
t
(
uint32_t
*
ptr
,
uint32_t
val
)
{
// CHECK: @t
// CHECK: atomicrmw xchg ptr {{.*}} seq_cst, align 4
return
__sync_lock_test_and_set
(
ptr
,
val
);
}