Add the clang library to the repo (with some of my changes, too).

1 files changed, 314 insertions, 0 deletions

diff --git a/clang/test/CodeGen/atomic-ops.c b/clang/test/CodeGen/atomic-ops.c
new file mode 100644
index 0000000..1a9ed36
--- /dev/null
+++ b/clang/test/CodeGen/atomic-ops.c
@@ -0,0 +1,314 @@
+// RUN: %clang_cc1 %s -emit-llvm -o - -triple=i686-apple-darwin9 | FileCheck %s
+
+// Also test serialization of atomic operations here, to avoid duplicating the
+// test.
+// RUN: %clang_cc1 %s -emit-pch -o %t -triple=i686-apple-darwin9
+// RUN: %clang_cc1 %s -include-pch %t -triple=i686-apple-darwin9 -emit-llvm -o - | FileCheck %s
+#ifndef ALREADY_INCLUDED
+#define ALREADY_INCLUDED
+
+// Basic IRGen tests for __c11_atomic_* and GNU __atomic_*
+
+typedef enum memory_order {
+  memory_order_relaxed, memory_order_consume, memory_order_acquire,
+  memory_order_release, memory_order_acq_rel, memory_order_seq_cst
+} memory_order;
+
+int fi1(_Atomic(int) *i) {
+  // CHECK: @fi1
+  // CHECK: load atomic i32* {{.*}} seq_cst
+  return __c11_atomic_load(i, memory_order_seq_cst);
+}
+
+int fi1a(int *i) {
+  // CHECK: @fi1a
+  // CHECK: load atomic i32* {{.*}} seq_cst
+  int v;
+  __atomic_load(i, &v, memory_order_seq_cst);
+  return v;
+}
+
+int fi1b(int *i) {
+  // CHECK: @fi1b
+  // CHECK: load atomic i32* {{.*}} seq_cst
+  return __atomic_load_n(i, memory_order_seq_cst);
+}
+
+void fi2(_Atomic(int) *i) {
+  // CHECK: @fi2
+  // CHECK: store atomic i32 {{.*}} seq_cst
+  __c11_atomic_store(i, 1, memory_order_seq_cst);
+}
+
+void fi2a(int *i) {
+  // CHECK: @fi2a
+  // CHECK: store atomic i32 {{.*}} seq_cst
+  int v = 1;
+  __atomic_store(i, &v, memory_order_seq_cst);
+}
+
+void fi2b(int *i) {
+  // CHECK: @fi2b
+  // CHECK: store atomic i32 {{.*}} seq_cst
+  __atomic_store_n(i, 1, memory_order_seq_cst);
+}
+
+int fi3(_Atomic(int) *i) {
+  // CHECK: @fi3
+  // CHECK: atomicrmw and
+  // CHECK-NOT: and
+  return __c11_atomic_fetch_and(i, 1, memory_order_seq_cst);
+}
+
+int fi3a(int *i) {
+  // CHECK: @fi3a
+  // CHECK: atomicrmw xor
+  // CHECK-NOT: xor
+  return __atomic_fetch_xor(i, 1, memory_order_seq_cst);
+}
+
+int fi3b(int *i) {
+  // CHECK: @fi3b
+  // CHECK: atomicrmw add
+  // CHECK: add
+  return __atomic_add_fetch(i, 1, memory_order_seq_cst);
+}
+
+int fi3c(int *i) {
+  // CHECK: @fi3c
+  // CHECK: atomicrmw nand
+  // CHECK-NOT: and
+  return __atomic_fetch_nand(i, 1, memory_order_seq_cst);
+}
+
+int fi3d(int *i) {
+  // CHECK: @fi3d
+  // CHECK: atomicrmw nand
+  // CHECK: and
+  // CHECK: xor
+  return __atomic_nand_fetch(i, 1, memory_order_seq_cst);
+}
+
+_Bool fi4(_Atomic(int) *i) {
+  // CHECK: @fi4
+  // CHECK: cmpxchg i32*
+  int cmp = 0;
+  return __c11_atomic_compare_exchange_strong(i, &cmp, 1, memory_order_acquire, memory_order_acquire);
+}
+
+_Bool fi4a(int *i) {
+  // CHECK: @fi4
+  // CHECK: cmpxchg i32*
+  int cmp = 0;
+  int desired = 1;
+  return __atomic_compare_exchange(i, &cmp, &desired, 0, memory_order_acquire, memory_order_acquire);
+}
+
+_Bool fi4b(int *i) {
+  // CHECK: @fi4
+  // CHECK: cmpxchg i32*
+  int cmp = 0;
+  return __atomic_compare_exchange_n(i, &cmp, 1, 1, memory_order_acquire, memory_order_acquire);
+}
+
+float ff1(_Atomic(float) *d) {
+  // CHECK: @ff1
+  // CHECK: load atomic i32* {{.*}} monotonic
+  return __c11_atomic_load(d, memory_order_relaxed);
+}
+
+void ff2(_Atomic(float) *d) {
+  // CHECK: @ff2
+  // CHECK: store atomic i32 {{.*}} release
+  __c11_atomic_store(d, 1, memory_order_release);
+}
+
+float ff3(_Atomic(float) *d) {
+  return __c11_atomic_exchange(d, 2, memory_order_seq_cst);
+}
+
+int* fp1(_Atomic(int*) *p) {
+  // CHECK: @fp1
+  // CHECK: load atomic i32* {{.*}} seq_cst
+  return __c11_atomic_load(p, memory_order_seq_cst);
+}
+
+int* fp2(_Atomic(int*) *p) {
+  // CHECK: @fp2
+  // CHECK: store i32 4
+  // CHECK: atomicrmw add {{.*}} monotonic
+  return __c11_atomic_fetch_add(p, 1, memory_order_relaxed);
+}
+
+int *fp2a(int **p) {
+  // CHECK: @fp2a
+  // CHECK: store i32 4
+  // CHECK: atomicrmw sub {{.*}} monotonic
+  // Note, the GNU builtins do not multiply by sizeof(T)!
+  return __atomic_fetch_sub(p, 4, memory_order_relaxed);
+}
+
+_Complex float fc(_Atomic(_Complex float) *c) {
+  // CHECK: @fc
+  // CHECK: atomicrmw xchg i64*
+  return __c11_atomic_exchange(c, 2, memory_order_seq_cst);
+}
+
+typedef struct X { int x; } X;
+X fs(_Atomic(X) *c) {
+  // CHECK: @fs
+  // CHECK: atomicrmw xchg i32*
+  return __c11_atomic_exchange(c, (X){2}, memory_order_seq_cst);
+}
+
+X fsa(X *c, X *d) {
+  // CHECK: @fsa
+  // CHECK: atomicrmw xchg i32*
+  X ret;
+  __atomic_exchange(c, d, &ret, memory_order_seq_cst);
+  return ret;
+}
+
+_Bool fsb(_Bool *c) {
+  // CHECK: @fsb
+  // CHECK: atomicrmw xchg i8*
+  return __atomic_exchange_n(c, 1, memory_order_seq_cst);
+}
+
+char flag1;
+volatile char flag2;
+void test_and_set() {
+  // CHECK: atomicrmw xchg i8* @flag1, i8 1 seq_cst
+  __atomic_test_and_set(&flag1, memory_order_seq_cst);
+  // CHECK: atomicrmw volatile xchg i8* @flag2, i8 1 acquire
+  __atomic_test_and_set(&flag2, memory_order_acquire);
+  // CHECK: store atomic volatile i8 0, i8* @flag2 release
+  __atomic_clear(&flag2, memory_order_release);
+  // CHECK: store atomic i8 0, i8* @flag1 seq_cst
+  __atomic_clear(&flag1, memory_order_seq_cst);
+}
+
+struct Sixteen {
+  char c[16];
+} sixteen;
+struct Seventeen {
+  char c[17];
+} seventeen;
+
+int lock_free(struct Incomplete *incomplete) {
+  // CHECK: @lock_free
+
+  // CHECK: call i32 @__atomic_is_lock_free(i32 3, i8* null)
+  __c11_atomic_is_lock_free(3);
+
+  // CHECK: call i32 @__atomic_is_lock_free(i32 16, i8* {{.*}}@sixteen{{.*}})
+  __atomic_is_lock_free(16, &sixteen);
+
+  // CHECK: call i32 @__atomic_is_lock_free(i32 17, i8* {{.*}}@seventeen{{.*}})
+  __atomic_is_lock_free(17, &seventeen);
+
+  // CHECK: call i32 @__atomic_is_lock_free(i32 4, {{.*}})
+  __atomic_is_lock_free(4, incomplete);
+
+  char cs[20];
+  // CHECK: call i32 @__atomic_is_lock_free(i32 4, {{.*}})
+  __atomic_is_lock_free(4, cs+1);
+
+  // CHECK-NOT: call
+  __atomic_always_lock_free(3, 0);
+  __atomic_always_lock_free(16, 0);
+  __atomic_always_lock_free(17, 0);
+  __atomic_always_lock_free(16, &sixteen);
+  __atomic_always_lock_free(17, &seventeen);
+
+  int n;
+  __atomic_is_lock_free(4, &n);
+
+  // CHECK: ret i32 1
+  return __c11_atomic_is_lock_free(sizeof(_Atomic(int)));
+}
+
+// Tests for atomic operations on big values.  These should call the functions
+// defined here:
+// http://gcc.gnu.org/wiki/Atomic/GCCMM/LIbrary#The_Library_interface
+
+struct foo {
+  int big[128];
+};
+struct bar {
+  char c[3];
+};
+
+struct bar smallThing, thing1, thing2;
+struct foo bigThing;
+_Atomic(struct foo) bigAtomic;
+
+void structAtomicStore() {
+  // CHECK: @structAtomicStore
+  struct foo f = {0};
+  __c11_atomic_store(&bigAtomic, f, 5);
+  // CHECK: call void @__atomic_store(i32 512, i8* bitcast ({{.*}} @bigAtomic to i8*),
+
+  struct bar b = {0};
+  __atomic_store(&smallThing, &b, 5);
+  // CHECK: call void @__atomic_store(i32 3, i8* {{.*}} @smallThing
+
+  __atomic_store(&bigThing, &f, 5);
+  // CHECK: call void @__atomic_store(i32 512, i8* {{.*}} @bigThing
+}
+void structAtomicLoad() {
+  // CHECK: @structAtomicLoad
+  struct foo f = __c11_atomic_load(&bigAtomic, 5);
+  // CHECK: call void @__atomic_load(i32 512, i8* bitcast ({{.*}} @bigAtomic to i8*),
+
+  struct bar b;
+  __atomic_load(&smallThing, &b, 5);
+  // CHECK: call void @__atomic_load(i32 3, i8* {{.*}} @smallThing
+
+  __atomic_load(&bigThing, &f, 5);
+  // CHECK: call void @__atomic_load(i32 512, i8* {{.*}} @bigThing
+}
+struct foo structAtomicExchange() {
+  // CHECK: @structAtomicExchange
+  struct foo f = {0};
+  struct foo old;
+  __atomic_exchange(&f, &bigThing, &old, 5);
+  // CHECK: call void @__atomic_exchange(i32 512, {{.*}}, i8* bitcast ({{.*}} @bigThing to i8*),
+
+  return __c11_atomic_exchange(&bigAtomic, f, 5);
+  // CHECK: call void @__atomic_exchange(i32 512, i8* bitcast ({{.*}} @bigAtomic to i8*),
+}
+int structAtomicCmpExchange() {
+  // CHECK: @structAtomicCmpExchange
+  _Bool x = __atomic_compare_exchange(&smallThing, &thing1, &thing2, 1, 5, 5);
+  // CHECK: call zeroext i1 @__atomic_compare_exchange(i32 3, {{.*}} @smallThing{{.*}} @thing1{{.*}} @thing2
+
+  struct foo f = {0};
+  struct foo g = {0};
+  g.big[12] = 12;
+  return x & __c11_atomic_compare_exchange_strong(&bigAtomic, &f, g, 5, 5);
+  // CHECK: call zeroext i1 @__atomic_compare_exchange(i32 512, i8* bitcast ({{.*}} @bigAtomic to i8*),
+}
+
+// Check that no atomic operations are used in any initialisation of _Atomic
+// types.
+_Atomic(int) atomic_init_i = 42;
+
+// CHECK: @atomic_init_foo
+void atomic_init_foo()
+{
+  // CHECK-NOT: }
+  // CHECK-NOT: atomic
+  // CHECK: store
+  _Atomic(int) j = 12;
+
+  // CHECK-NOT: }
+  // CHECK-NOT: atomic
+  // CHECK: store
+  __c11_atomic_init(&j, 42);
+
+  // CHECK-NOT: atomic
+  // CHECK: }
+}
+
+#endif