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teak-llvm/clang/test/CodeGen/Atomics.c
Hal Finkel d2208b59cf Add __sync_fetch_and_nand (again) 
Prior to GCC 4.4, __sync_fetch_and_nand was implemented as:

  { tmp = *ptr; *ptr = ~tmp & value; return tmp; }

but this was changed in GCC 4.4 to be:

  { tmp = *ptr; *ptr = ~(tmp & value); return tmp; }

in response to this change, support for sync_fetch_and_nand (and
sync_nand_and_fetch) was removed in r99522 in order to avoid miscompiling code
depending on the old semantics. However, at this point:

  1. Many years have passed, and the amount of code relying on the old
     semantics is likely smaller.

  2. Through the work of many contributors, all LLVM backends have been updated
     such that "atomicrmw nand" provides the newer GCC 4.4+ semantics (this process
     was complete July of 2014 (added to the release notes in r212635).

  3. The lack of this intrinsic is now a needless impediment to porting codes
     from GCC to Clang (I've now seen several examples of this).

It is true, however, that we still set GNUC_MINOR to 2 (corresponding to GCC
4.2). To compensate for this, and to address the original concern regarding
code relying on the old semantics, I've added a warning that specifically
details the fact that the semantics have changed and that we provide the newer
semantics.

Fixes PR8842.

llvm-svn: 218905
2014-10-02 20:53:50 +00:00

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// Test frontend handling of __sync builtins.
// Modified from a gcc testcase.
// RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm %s -o - | FileCheck %s
signed char sc;
unsigned char uc;
signed short ss;
unsigned short us;
signed int si;
unsigned int ui;
signed long long sll;
unsigned long long ull;
void test_op_ignore (void) // CHECK-LABEL: define void @test_op_ignore
{
(void) __sync_fetch_and_add (&sc, 1); // CHECK: atomicrmw add i8
(void) __sync_fetch_and_add (&uc, 1); // CHECK: atomicrmw add i8
(void) __sync_fetch_and_add (&ss, 1); // CHECK: atomicrmw add i16
(void) __sync_fetch_and_add (&us, 1); // CHECK: atomicrmw add i16
(void) __sync_fetch_and_add (&si, 1); // CHECK: atomicrmw add i32
(void) __sync_fetch_and_add (&ui, 1); // CHECK: atomicrmw add i32
(void) __sync_fetch_and_add (&sll, 1); // CHECK: atomicrmw add i64
(void) __sync_fetch_and_add (&ull, 1); // CHECK: atomicrmw add i64
(void) __sync_fetch_and_sub (&sc, 1); // CHECK: atomicrmw sub i8
(void) __sync_fetch_and_sub (&uc, 1); // CHECK: atomicrmw sub i8
(void) __sync_fetch_and_sub (&ss, 1); // CHECK: atomicrmw sub i16
(void) __sync_fetch_and_sub (&us, 1); // CHECK: atomicrmw sub i16
(void) __sync_fetch_and_sub (&si, 1); // CHECK: atomicrmw sub i32
(void) __sync_fetch_and_sub (&ui, 1); // CHECK: atomicrmw sub i32
(void) __sync_fetch_and_sub (&sll, 1); // CHECK: atomicrmw sub i64
(void) __sync_fetch_and_sub (&ull, 1); // CHECK: atomicrmw sub i64
(void) __sync_fetch_and_or (&sc, 1); // CHECK: atomicrmw or i8
(void) __sync_fetch_and_or (&uc, 1); // CHECK: atomicrmw or i8
(void) __sync_fetch_and_or (&ss, 1); // CHECK: atomicrmw or i16
(void) __sync_fetch_and_or (&us, 1); // CHECK: atomicrmw or i16
(void) __sync_fetch_and_or (&si, 1); // CHECK: atomicrmw or i32
(void) __sync_fetch_and_or (&ui, 1); // CHECK: atomicrmw or i32
(void) __sync_fetch_and_or (&sll, 1); // CHECK: atomicrmw or i64
(void) __sync_fetch_and_or (&ull, 1); // CHECK: atomicrmw or i64
(void) __sync_fetch_and_xor (&sc, 1); // CHECK: atomicrmw xor i8
(void) __sync_fetch_and_xor (&uc, 1); // CHECK: atomicrmw xor i8
(void) __sync_fetch_and_xor (&ss, 1); // CHECK: atomicrmw xor i16
(void) __sync_fetch_and_xor (&us, 1); // CHECK: atomicrmw xor i16
(void) __sync_fetch_and_xor (&si, 1); // CHECK: atomicrmw xor i32
(void) __sync_fetch_and_xor (&ui, 1); // CHECK: atomicrmw xor i32
(void) __sync_fetch_and_xor (&sll, 1); // CHECK: atomicrmw xor i64
(void) __sync_fetch_and_xor (&ull, 1); // CHECK: atomicrmw xor i64
(void) __sync_fetch_and_nand (&sc, 1); // CHECK: atomicrmw nand i8
(void) __sync_fetch_and_nand (&uc, 1); // CHECK: atomicrmw nand i8
(void) __sync_fetch_and_nand (&ss, 1); // CHECK: atomicrmw nand i16
(void) __sync_fetch_and_nand (&us, 1); // CHECK: atomicrmw nand i16
(void) __sync_fetch_and_nand (&si, 1); // CHECK: atomicrmw nand i32
(void) __sync_fetch_and_nand (&ui, 1); // CHECK: atomicrmw nand i32
(void) __sync_fetch_and_nand (&sll, 1); // CHECK: atomicrmw nand i64
(void) __sync_fetch_and_nand (&ull, 1); // CHECK: atomicrmw nand i64
(void) __sync_fetch_and_and (&sc, 1); // CHECK: atomicrmw and i8
(void) __sync_fetch_and_and (&uc, 1); // CHECK: atomicrmw and i8
(void) __sync_fetch_and_and (&ss, 1); // CHECK: atomicrmw and i16
(void) __sync_fetch_and_and (&us, 1); // CHECK: atomicrmw and i16
(void) __sync_fetch_and_and (&si, 1); // CHECK: atomicrmw and i32
(void) __sync_fetch_and_and (&ui, 1); // CHECK: atomicrmw and i32
(void) __sync_fetch_and_and (&sll, 1); // CHECK: atomicrmw and i64
(void) __sync_fetch_and_and (&ull, 1); // CHECK: atomicrmw and i64
}
void test_fetch_and_op (void) // CHECK-LABEL: define void @test_fetch_and_op
{
sc = __sync_fetch_and_add (&sc, 11); // CHECK: atomicrmw add
uc = __sync_fetch_and_add (&uc, 11); // CHECK: atomicrmw add
ss = __sync_fetch_and_add (&ss, 11); // CHECK: atomicrmw add
us = __sync_fetch_and_add (&us, 11); // CHECK: atomicrmw add
si = __sync_fetch_and_add (&si, 11); // CHECK: atomicrmw add
ui = __sync_fetch_and_add (&ui, 11); // CHECK: atomicrmw add
sll = __sync_fetch_and_add (&sll, 11); // CHECK: atomicrmw add
ull = __sync_fetch_and_add (&ull, 11); // CHECK: atomicrmw add
sc = __sync_fetch_and_sub (&sc, 11); // CHECK: atomicrmw sub
uc = __sync_fetch_and_sub (&uc, 11); // CHECK: atomicrmw sub
ss = __sync_fetch_and_sub (&ss, 11); // CHECK: atomicrmw sub
us = __sync_fetch_and_sub (&us, 11); // CHECK: atomicrmw sub
si = __sync_fetch_and_sub (&si, 11); // CHECK: atomicrmw sub
ui = __sync_fetch_and_sub (&ui, 11); // CHECK: atomicrmw sub
sll = __sync_fetch_and_sub (&sll, 11); // CHECK: atomicrmw sub
ull = __sync_fetch_and_sub (&ull, 11); // CHECK: atomicrmw sub
sc = __sync_fetch_and_or (&sc, 11); // CHECK: atomicrmw or
uc = __sync_fetch_and_or (&uc, 11); // CHECK: atomicrmw or
ss = __sync_fetch_and_or (&ss, 11); // CHECK: atomicrmw or
us = __sync_fetch_and_or (&us, 11); // CHECK: atomicrmw or
si = __sync_fetch_and_or (&si, 11); // CHECK: atomicrmw or
ui = __sync_fetch_and_or (&ui, 11); // CHECK: atomicrmw or
sll = __sync_fetch_and_or (&sll, 11); // CHECK: atomicrmw or
ull = __sync_fetch_and_or (&ull, 11); // CHECK: atomicrmw or
sc = __sync_fetch_and_xor (&sc, 11); // CHECK: atomicrmw xor
uc = __sync_fetch_and_xor (&uc, 11); // CHECK: atomicrmw xor
ss = __sync_fetch_and_xor (&ss, 11); // CHECK: atomicrmw xor
us = __sync_fetch_and_xor (&us, 11); // CHECK: atomicrmw xor
si = __sync_fetch_and_xor (&si, 11); // CHECK: atomicrmw xor
ui = __sync_fetch_and_xor (&ui, 11); // CHECK: atomicrmw xor
sll = __sync_fetch_and_xor (&sll, 11); // CHECK: atomicrmw xor
ull = __sync_fetch_and_xor (&ull, 11); // CHECK: atomicrmw xor
sc = __sync_fetch_and_nand (&sc, 11); // CHECK: atomicrmw nand
uc = __sync_fetch_and_nand (&uc, 11); // CHECK: atomicrmw nand
ss = __sync_fetch_and_nand (&ss, 11); // CHECK: atomicrmw nand
us = __sync_fetch_and_nand (&us, 11); // CHECK: atomicrmw nand
si = __sync_fetch_and_nand (&si, 11); // CHECK: atomicrmw nand
ui = __sync_fetch_and_nand (&ui, 11); // CHECK: atomicrmw nand
sll = __sync_fetch_and_nand (&sll, 11); // CHECK: atomicrmw nand
ull = __sync_fetch_and_nand (&ull, 11); // CHECK: atomicrmw nand
sc = __sync_fetch_and_and (&sc, 11); // CHECK: atomicrmw and
uc = __sync_fetch_and_and (&uc, 11); // CHECK: atomicrmw and
ss = __sync_fetch_and_and (&ss, 11); // CHECK: atomicrmw and
us = __sync_fetch_and_and (&us, 11); // CHECK: atomicrmw and
si = __sync_fetch_and_and (&si, 11); // CHECK: atomicrmw and
ui = __sync_fetch_and_and (&ui, 11); // CHECK: atomicrmw and
sll = __sync_fetch_and_and (&sll, 11); // CHECK: atomicrmw and
ull = __sync_fetch_and_and (&ull, 11); // CHECK: atomicrmw and
}
void test_op_and_fetch (void)
{
sc = __sync_add_and_fetch (&sc, uc); // CHECK: atomicrmw add
uc = __sync_add_and_fetch (&uc, uc); // CHECK: atomicrmw add
ss = __sync_add_and_fetch (&ss, uc); // CHECK: atomicrmw add
us = __sync_add_and_fetch (&us, uc); // CHECK: atomicrmw add
si = __sync_add_and_fetch (&si, uc); // CHECK: atomicrmw add
ui = __sync_add_and_fetch (&ui, uc); // CHECK: atomicrmw add
sll = __sync_add_and_fetch (&sll, uc); // CHECK: atomicrmw add
ull = __sync_add_and_fetch (&ull, uc); // CHECK: atomicrmw add
sc = __sync_sub_and_fetch (&sc, uc); // CHECK: atomicrmw sub
uc = __sync_sub_and_fetch (&uc, uc); // CHECK: atomicrmw sub
ss = __sync_sub_and_fetch (&ss, uc); // CHECK: atomicrmw sub
us = __sync_sub_and_fetch (&us, uc); // CHECK: atomicrmw sub
si = __sync_sub_and_fetch (&si, uc); // CHECK: atomicrmw sub
ui = __sync_sub_and_fetch (&ui, uc); // CHECK: atomicrmw sub
sll = __sync_sub_and_fetch (&sll, uc); // CHECK: atomicrmw sub
ull = __sync_sub_and_fetch (&ull, uc); // CHECK: atomicrmw sub
sc = __sync_or_and_fetch (&sc, uc); // CHECK: atomicrmw or
uc = __sync_or_and_fetch (&uc, uc); // CHECK: atomicrmw or
ss = __sync_or_and_fetch (&ss, uc); // CHECK: atomicrmw or
us = __sync_or_and_fetch (&us, uc); // CHECK: atomicrmw or
si = __sync_or_and_fetch (&si, uc); // CHECK: atomicrmw or
ui = __sync_or_and_fetch (&ui, uc); // CHECK: atomicrmw or
sll = __sync_or_and_fetch (&sll, uc); // CHECK: atomicrmw or
ull = __sync_or_and_fetch (&ull, uc); // CHECK: atomicrmw or
sc = __sync_xor_and_fetch (&sc, uc); // CHECK: atomicrmw xor
uc = __sync_xor_and_fetch (&uc, uc); // CHECK: atomicrmw xor
ss = __sync_xor_and_fetch (&ss, uc); // CHECK: atomicrmw xor
us = __sync_xor_and_fetch (&us, uc); // CHECK: atomicrmw xor
si = __sync_xor_and_fetch (&si, uc); // CHECK: atomicrmw xor
ui = __sync_xor_and_fetch (&ui, uc); // CHECK: atomicrmw xor
sll = __sync_xor_and_fetch (&sll, uc); // CHECK: atomicrmw xor
ull = __sync_xor_and_fetch (&ull, uc); // CHECK: atomicrmw xor
sc = __sync_nand_and_fetch (&sc, uc); // CHECK: atomicrmw nand
// CHECK: and
// CHECK: xor
uc = __sync_nand_and_fetch (&uc, uc); // CHECK: atomicrmw nand
// CHECK: and
// CHECK: xor
ss = __sync_nand_and_fetch (&ss, uc); // CHECK: atomicrmw nand
// CHECK: and
// CHECK: xor
us = __sync_nand_and_fetch (&us, uc); // CHECK: atomicrmw nand
// CHECK: and
// CHECK: xor
si = __sync_nand_and_fetch (&si, uc); // CHECK: atomicrmw nand
// CHECK: and
// CHECK: xor
ui = __sync_nand_and_fetch (&ui, uc); // CHECK: atomicrmw nand
// CHECK: and
// CHECK: xor
sll = __sync_nand_and_fetch (&sll, uc); // CHECK: atomicrmw nand
// CHECK: and
// CHECK: xor
ull = __sync_nand_and_fetch (&ull, uc); // CHECK: atomicrmw nand
// CHECK: and
// CHECK: xor
sc = __sync_and_and_fetch (&sc, uc); // CHECK: atomicrmw and
uc = __sync_and_and_fetch (&uc, uc); // CHECK: atomicrmw and
ss = __sync_and_and_fetch (&ss, uc); // CHECK: atomicrmw and
us = __sync_and_and_fetch (&us, uc); // CHECK: atomicrmw and
si = __sync_and_and_fetch (&si, uc); // CHECK: atomicrmw and
ui = __sync_and_and_fetch (&ui, uc); // CHECK: atomicrmw and
sll = __sync_and_and_fetch (&sll, uc); // CHECK: atomicrmw and
ull = __sync_and_and_fetch (&ull, uc); // CHECK: atomicrmw and
}
void test_compare_and_swap (void)
{
sc = __sync_val_compare_and_swap (&sc, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i8
// CHECK: extractvalue { i8, i1 } [[PAIR]], 0
uc = __sync_val_compare_and_swap (&uc, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i8
// CHECK: extractvalue { i8, i1 } [[PAIR]], 0
ss = __sync_val_compare_and_swap (&ss, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i16
// CHECK: extractvalue { i16, i1 } [[PAIR]], 0
us = __sync_val_compare_and_swap (&us, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i16
// CHECK: extractvalue { i16, i1 } [[PAIR]], 0
si = __sync_val_compare_and_swap (&si, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i32
// CHECK: extractvalue { i32, i1 } [[PAIR]], 0
ui = __sync_val_compare_and_swap (&ui, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i32
// CHECK: extractvalue { i32, i1 } [[PAIR]], 0
sll = __sync_val_compare_and_swap (&sll, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i64
// CHECK: extractvalue { i64, i1 } [[PAIR]], 0
ull = __sync_val_compare_and_swap (&ull, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i64
// CHECK: extractvalue { i64, i1 } [[PAIR]], 0
ui = __sync_bool_compare_and_swap (&sc, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i8
// CHECK: extractvalue { i8, i1 } [[PAIR]], 1
ui = __sync_bool_compare_and_swap (&uc, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i8
// CHECK: extractvalue { i8, i1 } [[PAIR]], 1
ui = __sync_bool_compare_and_swap (&ss, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i16
// CHECK: extractvalue { i16, i1 } [[PAIR]], 1
ui = __sync_bool_compare_and_swap (&us, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i16
// CHECK: extractvalue { i16, i1 } [[PAIR]], 1
ui = __sync_bool_compare_and_swap (&si, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i32
// CHECK: extractvalue { i32, i1 } [[PAIR]], 1
ui = __sync_bool_compare_and_swap (&ui, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i32
// CHECK: extractvalue { i32, i1 } [[PAIR]], 1
ui = __sync_bool_compare_and_swap (&sll, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i64
// CHECK: extractvalue { i64, i1 } [[PAIR]], 1
ui = __sync_bool_compare_and_swap (&ull, uc, sc);
// CHECK: [[PAIR:%[a-z0-9._]+]] = cmpxchg i64
// CHECK: extractvalue { i64, i1 } [[PAIR]], 1
}
void test_lock (void)
{
sc = __sync_lock_test_and_set (&sc, 1); // CHECK: atomicrmw xchg i8
uc = __sync_lock_test_and_set (&uc, 1); // CHECK: atomicrmw xchg i8
ss = __sync_lock_test_and_set (&ss, 1); // CHECK: atomicrmw xchg i16
us = __sync_lock_test_and_set (&us, 1); // CHECK: atomicrmw xchg i16
si = __sync_lock_test_and_set (&si, 1); // CHECK: atomicrmw xchg i32
ui = __sync_lock_test_and_set (&ui, 1); // CHECK: atomicrmw xchg i32
sll = __sync_lock_test_and_set (&sll, 1); // CHECK: atomicrmw xchg i64
ull = __sync_lock_test_and_set (&ull, 1); // CHECK: atomicrmw xchg i64
__sync_synchronize (); // CHECK: fence seq_cst
__sync_lock_release (&sc); // CHECK: store atomic {{.*}} release, align 1
__sync_lock_release (&uc); // CHECK: store atomic {{.*}} release, align 1
__sync_lock_release (&ss); // CHECK: store atomic {{.*}} release, align 2
__sync_lock_release (&us); /// CHECK: store atomic {{.*}} release, align 2
__sync_lock_release (&si); // CHECK: store atomic {{.*}} release, align 4
__sync_lock_release (&ui); // CHECK: store atomic {{.*}} release, align 4
__sync_lock_release (&sll); // CHECK: store atomic {{.*}} release, align 8
__sync_lock_release (&ull); // CHECK: store atomic {{.*}} release, align 8
}
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