forked from OSchip/llvm-project
547 lines
18 KiB
C
547 lines
18 KiB
C
// RUN: %clang_cc1 %s -emit-llvm -o - -ffreestanding -triple=i686-apple-darwin9 | FileCheck %s
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// Also test serialization of atomic operations here, to avoid duplicating the
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// test.
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// RUN: %clang_cc1 %s -emit-pch -o %t -ffreestanding -triple=i686-apple-darwin9
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// RUN: %clang_cc1 %s -include-pch %t -ffreestanding -triple=i686-apple-darwin9 -emit-llvm -o - | FileCheck %s
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#ifndef ALREADY_INCLUDED
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#define ALREADY_INCLUDED
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#include <stdatomic.h>
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// Basic IRGen tests for __c11_atomic_* and GNU __atomic_*
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int fi1(_Atomic(int) *i) {
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// CHECK-LABEL: @fi1
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// CHECK: load atomic i32* {{.*}} seq_cst
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return __c11_atomic_load(i, memory_order_seq_cst);
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}
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int fi1a(int *i) {
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// CHECK-LABEL: @fi1a
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// CHECK: load atomic i32* {{.*}} seq_cst
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int v;
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__atomic_load(i, &v, memory_order_seq_cst);
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return v;
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}
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int fi1b(int *i) {
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// CHECK-LABEL: @fi1b
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// CHECK: load atomic i32* {{.*}} seq_cst
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return __atomic_load_n(i, memory_order_seq_cst);
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}
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int fi1c(atomic_int *i) {
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// CHECK-LABEL: @fi1c
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// CHECK: load atomic i32* {{.*}} seq_cst
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return atomic_load(i);
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}
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void fi2(_Atomic(int) *i) {
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// CHECK-LABEL: @fi2
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// CHECK: store atomic i32 {{.*}} seq_cst
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__c11_atomic_store(i, 1, memory_order_seq_cst);
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}
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void fi2a(int *i) {
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// CHECK-LABEL: @fi2a
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// CHECK: store atomic i32 {{.*}} seq_cst
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int v = 1;
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__atomic_store(i, &v, memory_order_seq_cst);
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}
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void fi2b(int *i) {
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// CHECK-LABEL: @fi2b
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// CHECK: store atomic i32 {{.*}} seq_cst
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__atomic_store_n(i, 1, memory_order_seq_cst);
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}
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void fi2c(atomic_int *i) {
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// CHECK-LABEL: @fi2c
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// CHECK: store atomic i32 {{.*}} seq_cst
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atomic_store(i, 1);
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}
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int fi3(_Atomic(int) *i) {
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// CHECK-LABEL: @fi3
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// CHECK: atomicrmw and
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// CHECK-NOT: and
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return __c11_atomic_fetch_and(i, 1, memory_order_seq_cst);
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}
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int fi3a(int *i) {
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// CHECK-LABEL: @fi3a
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// CHECK: atomicrmw xor
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// CHECK-NOT: xor
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return __atomic_fetch_xor(i, 1, memory_order_seq_cst);
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}
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int fi3b(int *i) {
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// CHECK-LABEL: @fi3b
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// CHECK: atomicrmw add
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// CHECK: add
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return __atomic_add_fetch(i, 1, memory_order_seq_cst);
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}
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int fi3c(int *i) {
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// CHECK-LABEL: @fi3c
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// CHECK: atomicrmw nand
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// CHECK-NOT: and
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return __atomic_fetch_nand(i, 1, memory_order_seq_cst);
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}
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int fi3d(int *i) {
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// CHECK-LABEL: @fi3d
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// CHECK: atomicrmw nand
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// CHECK: and
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// CHECK: xor
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return __atomic_nand_fetch(i, 1, memory_order_seq_cst);
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}
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int fi3e(atomic_int *i) {
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// CHECK-LABEL: @fi3e
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// CHECK: atomicrmw or
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// CHECK-NOT: {{ or }}
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return atomic_fetch_or(i, 1);
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}
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_Bool fi4(_Atomic(int) *i) {
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// CHECK-LABEL: @fi4(
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// CHECK: [[PAIR:%[.0-9A-Z_a-z]+]] = cmpxchg i32* [[PTR:%[.0-9A-Z_a-z]+]], i32 [[EXPECTED:%[.0-9A-Z_a-z]+]], i32 [[DESIRED:%[.0-9A-Z_a-z]+]]
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// CHECK: [[OLD:%[.0-9A-Z_a-z]+]] = extractvalue { i32, i1 } [[PAIR]], 0
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// CHECK: [[CMP:%[.0-9A-Z_a-z]+]] = extractvalue { i32, i1 } [[PAIR]], 1
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// CHECK: br i1 [[CMP]], label %[[STORE_EXPECTED:[.0-9A-Z_a-z]+]], label %[[CONTINUE:[.0-9A-Z_a-z]+]]
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// CHECK: store i32 [[OLD]]
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int cmp = 0;
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return __c11_atomic_compare_exchange_strong(i, &cmp, 1, memory_order_acquire, memory_order_acquire);
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}
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_Bool fi4a(int *i) {
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// CHECK-LABEL: @fi4a
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// CHECK: [[PAIR:%[.0-9A-Z_a-z]+]] = cmpxchg i32* [[PTR:%[.0-9A-Z_a-z]+]], i32 [[EXPECTED:%[.0-9A-Z_a-z]+]], i32 [[DESIRED:%[.0-9A-Z_a-z]+]]
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// CHECK: [[OLD:%[.0-9A-Z_a-z]+]] = extractvalue { i32, i1 } [[PAIR]], 0
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// CHECK: [[CMP:%[.0-9A-Z_a-z]+]] = extractvalue { i32, i1 } [[PAIR]], 1
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// CHECK: br i1 [[CMP]], label %[[STORE_EXPECTED:[.0-9A-Z_a-z]+]], label %[[CONTINUE:[.0-9A-Z_a-z]+]]
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// CHECK: store i32 [[OLD]]
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int cmp = 0;
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int desired = 1;
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return __atomic_compare_exchange(i, &cmp, &desired, 0, memory_order_acquire, memory_order_acquire);
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}
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_Bool fi4b(int *i) {
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// CHECK-LABEL: @fi4b(
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// CHECK: [[PAIR:%[.0-9A-Z_a-z]+]] = cmpxchg weak i32* [[PTR:%[.0-9A-Z_a-z]+]], i32 [[EXPECTED:%[.0-9A-Z_a-z]+]], i32 [[DESIRED:%[.0-9A-Z_a-z]+]]
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// CHECK: [[OLD:%[.0-9A-Z_a-z]+]] = extractvalue { i32, i1 } [[PAIR]], 0
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// CHECK: [[CMP:%[.0-9A-Z_a-z]+]] = extractvalue { i32, i1 } [[PAIR]], 1
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// CHECK: br i1 [[CMP]], label %[[STORE_EXPECTED:[.0-9A-Z_a-z]+]], label %[[CONTINUE:[.0-9A-Z_a-z]+]]
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// CHECK: store i32 [[OLD]]
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int cmp = 0;
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return __atomic_compare_exchange_n(i, &cmp, 1, 1, memory_order_acquire, memory_order_acquire);
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}
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_Bool fi4c(atomic_int *i) {
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// CHECK-LABEL: @fi4c
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// CHECK: cmpxchg i32*
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int cmp = 0;
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return atomic_compare_exchange_strong(i, &cmp, 1);
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}
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float ff1(_Atomic(float) *d) {
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// CHECK-LABEL: @ff1
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// CHECK: load atomic i32* {{.*}} monotonic
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return __c11_atomic_load(d, memory_order_relaxed);
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}
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void ff2(_Atomic(float) *d) {
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// CHECK-LABEL: @ff2
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// CHECK: store atomic i32 {{.*}} release
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__c11_atomic_store(d, 1, memory_order_release);
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}
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float ff3(_Atomic(float) *d) {
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return __c11_atomic_exchange(d, 2, memory_order_seq_cst);
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}
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struct S {
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double x;
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};
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struct S fd1(struct S *a) {
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// CHECK-LABEL: @fd1
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// CHECK: [[RETVAL:%.*]] = alloca %struct.S, align 4
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// CHECK: [[RET:%.*]] = alloca %struct.S, align 4
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// CHECK: [[CALL:%.*]] = call i64 @__atomic_load_8(
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// CHECK: [[CAST:%.*]] = bitcast %struct.S* [[RET]] to i64*
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// CHECK: store i64 [[CALL]], i64* [[CAST]], align 4
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struct S ret;
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__atomic_load(a, &ret, memory_order_seq_cst);
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return ret;
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}
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void fd2(struct S *a, struct S *b) {
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// CHECK-LABEL: @fd2
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// CHECK: [[A_ADDR:%.*]] = alloca %struct.S*, align 4
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// CHECK-NEXT: [[B_ADDR:%.*]] = alloca %struct.S*, align 4
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// CHECK-NEXT: store %struct.S* %a, %struct.S** [[A_ADDR]], align 4
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// CHECK-NEXT: store %struct.S* %b, %struct.S** [[B_ADDR]], align 4
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// CHECK-NEXT: [[LOAD_A_PTR:%.*]] = load %struct.S** [[A_ADDR]], align 4
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// CHECK-NEXT: [[LOAD_B_PTR:%.*]] = load %struct.S** [[B_ADDR]], align 4
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// CHECK-NEXT: [[COERCED_A:%.*]] = bitcast %struct.S* [[LOAD_A_PTR]] to i8*
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// CHECK-NEXT: [[COERCED_B:%.*]] = bitcast %struct.S* [[LOAD_B_PTR]] to i64*
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// CHECK-NEXT: [[LOAD_B:%.*]] = load i64* [[COERCED_B]], align 4
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// CHECK-NEXT: call void @__atomic_store_8(i8* [[COERCED_A]], i64 [[LOAD_B]],
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// CHECK-NEXT: ret void
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__atomic_store(a, b, memory_order_seq_cst);
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}
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void fd3(struct S *a, struct S *b, struct S *c) {
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// CHECK-LABEL: @fd3
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// CHECK: [[A_ADDR:%.*]] = alloca %struct.S*, align 4
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// CHECK-NEXT: [[B_ADDR:%.*]] = alloca %struct.S*, align 4
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// CHECK-NEXT: [[C_ADDR:%.*]] = alloca %struct.S*, align 4
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// CHECK-NEXT: store %struct.S* %a, %struct.S** [[A_ADDR]], align 4
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// CHECK-NEXT: store %struct.S* %b, %struct.S** [[B_ADDR]], align 4
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// CHECK-NEXT: store %struct.S* %c, %struct.S** [[C_ADDR]], align 4
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// CHECK-NEXT: [[LOAD_A_PTR:%.*]] = load %struct.S** [[A_ADDR]], align 4
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// CHECK-NEXT: [[LOAD_B_PTR:%.*]] = load %struct.S** [[B_ADDR]], align 4
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// CHECK-NEXT: [[LOAD_C_PTR:%.*]] = load %struct.S** [[C_ADDR]], align 4
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// CHECK-NEXT: [[COERCED_A:%.*]] = bitcast %struct.S* [[LOAD_A_PTR]] to i8*
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// CHECK-NEXT: [[COERCED_B:%.*]] = bitcast %struct.S* [[LOAD_B_PTR]] to i64*
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// CHECK-NEXT: [[LOAD_B:%.*]] = load i64* [[COERCED_B]], align 4
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// CHECK-NEXT: [[CALL:%.*]] = call i64 @__atomic_exchange_8(i8* [[COERCED_A]], i64 [[LOAD_B]],
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// CHECK-NEXT: [[COERCED_C:%.*]] = bitcast %struct.S* [[LOAD_C_PTR]] to i64*
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// CHECK-NEXT: store i64 [[CALL]], i64* [[COERCED_C]], align 4
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__atomic_exchange(a, b, c, memory_order_seq_cst);
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}
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_Bool fd4(struct S *a, struct S *b, struct S *c) {
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// CHECK-LABEL: @fd4
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// CHECK: [[A_ADDR:%.*]] = alloca %struct.S*, align 4
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// CHECK-NEXT: [[B_ADDR:%.*]] = alloca %struct.S*, align 4
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// CHECK-NEXT: [[C_ADDR:%.*]] = alloca %struct.S*, align 4
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// CHECK: store %struct.S* %a, %struct.S** [[A_ADDR]], align 4
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// CHECK-NEXT: store %struct.S* %b, %struct.S** [[B_ADDR]], align 4
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// CHECK-NEXT: store %struct.S* %c, %struct.S** [[C_ADDR]], align 4
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// CHECK-NEXT: [[LOAD_A_PTR:%.*]] = load %struct.S** [[A_ADDR]], align 4
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// CHECK-NEXT: [[LOAD_B_PTR:%.*]] = load %struct.S** [[B_ADDR]], align 4
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// CHECK-NEXT: [[LOAD_C_PTR:%.*]] = load %struct.S** [[C_ADDR]], align 4
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// CHECK-NEXT: [[COERCED_A:%.*]] = bitcast %struct.S* [[LOAD_A_PTR]] to i8*
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// CHECK-NEXT: [[COERCED_B:%.*]] = bitcast %struct.S* [[LOAD_B_PTR]] to i8*
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// CHECK-NEXT: [[COERCED_C:%.*]] = bitcast %struct.S* [[LOAD_C_PTR]] to i64*
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// CHECK-NEXT: [[LOAD_C:%.*]] = load i64* [[COERCED_C]], align 4
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// CHECK-NEXT: [[CALL:%.*]] = call zeroext i1 @__atomic_compare_exchange_8(i8* [[COERCED_A]], i8* [[COERCED_B]], i64 [[LOAD_C]]
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// CHECK-NEXT: ret i1 [[CALL]]
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return __atomic_compare_exchange(a, b, c, 1, 5, 5);
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}
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int* fp1(_Atomic(int*) *p) {
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// CHECK-LABEL: @fp1
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// CHECK: load atomic i32* {{.*}} seq_cst
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return __c11_atomic_load(p, memory_order_seq_cst);
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}
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int* fp2(_Atomic(int*) *p) {
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// CHECK-LABEL: @fp2
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// CHECK: store i32 4
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// CHECK: atomicrmw add {{.*}} monotonic
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return __c11_atomic_fetch_add(p, 1, memory_order_relaxed);
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}
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int *fp2a(int **p) {
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// CHECK-LABEL: @fp2a
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// CHECK: store i32 4
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// CHECK: atomicrmw sub {{.*}} monotonic
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// Note, the GNU builtins do not multiply by sizeof(T)!
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return __atomic_fetch_sub(p, 4, memory_order_relaxed);
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}
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_Complex float fc(_Atomic(_Complex float) *c) {
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// CHECK-LABEL: @fc
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// CHECK: atomicrmw xchg i64*
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return __c11_atomic_exchange(c, 2, memory_order_seq_cst);
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}
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typedef struct X { int x; } X;
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X fs(_Atomic(X) *c) {
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// CHECK-LABEL: @fs
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// CHECK: atomicrmw xchg i32*
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return __c11_atomic_exchange(c, (X){2}, memory_order_seq_cst);
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}
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X fsa(X *c, X *d) {
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// CHECK-LABEL: @fsa
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// CHECK: atomicrmw xchg i32*
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X ret;
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__atomic_exchange(c, d, &ret, memory_order_seq_cst);
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return ret;
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}
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_Bool fsb(_Bool *c) {
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// CHECK-LABEL: @fsb
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// CHECK: atomicrmw xchg i8*
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return __atomic_exchange_n(c, 1, memory_order_seq_cst);
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}
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char flag1;
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volatile char flag2;
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void test_and_set() {
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// CHECK: atomicrmw xchg i8* @flag1, i8 1 seq_cst
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__atomic_test_and_set(&flag1, memory_order_seq_cst);
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// CHECK: atomicrmw volatile xchg i8* @flag2, i8 1 acquire
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__atomic_test_and_set(&flag2, memory_order_acquire);
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// CHECK: store atomic volatile i8 0, i8* @flag2 release
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__atomic_clear(&flag2, memory_order_release);
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// CHECK: store atomic i8 0, i8* @flag1 seq_cst
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__atomic_clear(&flag1, memory_order_seq_cst);
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}
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struct Sixteen {
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char c[16];
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} sixteen;
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struct Seventeen {
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char c[17];
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} seventeen;
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int lock_free(struct Incomplete *incomplete) {
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// CHECK-LABEL: @lock_free
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// CHECK: call i32 @__atomic_is_lock_free(i32 3, i8* null)
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__c11_atomic_is_lock_free(3);
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// CHECK: call i32 @__atomic_is_lock_free(i32 16, i8* {{.*}}@sixteen{{.*}})
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__atomic_is_lock_free(16, &sixteen);
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// CHECK: call i32 @__atomic_is_lock_free(i32 17, i8* {{.*}}@seventeen{{.*}})
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__atomic_is_lock_free(17, &seventeen);
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// CHECK: call i32 @__atomic_is_lock_free(i32 4, {{.*}})
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__atomic_is_lock_free(4, incomplete);
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char cs[20];
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// CHECK: call i32 @__atomic_is_lock_free(i32 4, {{.*}})
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__atomic_is_lock_free(4, cs+1);
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// CHECK-NOT: call
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__atomic_always_lock_free(3, 0);
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__atomic_always_lock_free(16, 0);
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__atomic_always_lock_free(17, 0);
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__atomic_always_lock_free(16, &sixteen);
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__atomic_always_lock_free(17, &seventeen);
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int n;
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__atomic_is_lock_free(4, &n);
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// CHECK: ret i32 1
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return __c11_atomic_is_lock_free(sizeof(_Atomic(int)));
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}
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// Tests for atomic operations on big values. These should call the functions
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// defined here:
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// http://gcc.gnu.org/wiki/Atomic/GCCMM/LIbrary#The_Library_interface
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struct foo {
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int big[128];
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};
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struct bar {
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char c[3];
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};
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struct bar smallThing, thing1, thing2;
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struct foo bigThing;
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_Atomic(struct foo) bigAtomic;
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void structAtomicStore() {
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// CHECK-LABEL: @structAtomicStore
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struct foo f = {0};
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struct bar b = {0};
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__atomic_store(&smallThing, &b, 5);
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// CHECK: call void @__atomic_store(i32 3, i8* {{.*}} @smallThing
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__atomic_store(&bigThing, &f, 5);
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// CHECK: call void @__atomic_store(i32 512, i8* {{.*}} @bigThing
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}
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void structAtomicLoad() {
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// CHECK-LABEL: @structAtomicLoad
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struct bar b;
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__atomic_load(&smallThing, &b, 5);
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// CHECK: call void @__atomic_load(i32 3, i8* {{.*}} @smallThing
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struct foo f = {0};
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__atomic_load(&bigThing, &f, 5);
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// CHECK: call void @__atomic_load(i32 512, i8* {{.*}} @bigThing
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}
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struct foo structAtomicExchange() {
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// CHECK-LABEL: @structAtomicExchange
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struct foo f = {0};
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struct foo old;
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__atomic_exchange(&f, &bigThing, &old, 5);
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// CHECK: call void @__atomic_exchange(i32 512, {{.*}}, i8* bitcast ({{.*}} @bigThing to i8*),
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return __c11_atomic_exchange(&bigAtomic, f, 5);
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// CHECK: call void @__atomic_exchange(i32 512, i8* bitcast ({{.*}} @bigAtomic to i8*),
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}
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int structAtomicCmpExchange() {
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// CHECK-LABEL: @structAtomicCmpExchange
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_Bool x = __atomic_compare_exchange(&smallThing, &thing1, &thing2, 1, 5, 5);
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// CHECK: call zeroext i1 @__atomic_compare_exchange(i32 3, {{.*}} @smallThing{{.*}} @thing1{{.*}} @thing2
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struct foo f = {0};
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struct foo g = {0};
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g.big[12] = 12;
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return x & __c11_atomic_compare_exchange_strong(&bigAtomic, &f, g, 5, 5);
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// CHECK: call zeroext i1 @__atomic_compare_exchange(i32 512, i8* bitcast ({{.*}} @bigAtomic to i8*),
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}
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// Check that no atomic operations are used in any initialisation of _Atomic
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// types.
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_Atomic(int) atomic_init_i = 42;
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// CHECK-LABEL: @atomic_init_foo
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void atomic_init_foo()
|
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{
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// CHECK-NOT: }
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// CHECK-NOT: atomic
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// CHECK: store
|
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_Atomic(int) j = 12;
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// CHECK-NOT: }
|
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// CHECK-NOT: atomic
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// CHECK: store
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__c11_atomic_init(&j, 42);
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|
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// CHECK-NOT: atomic
|
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// CHECK: }
|
|
}
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|
|
|
// CHECK-LABEL: @failureOrder
|
|
void failureOrder(_Atomic(int) *ptr, int *ptr2) {
|
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__c11_atomic_compare_exchange_strong(ptr, ptr2, 43, memory_order_acquire, memory_order_relaxed);
|
|
// CHECK: cmpxchg i32* {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z_.]+}} acquire monotonic
|
|
|
|
__c11_atomic_compare_exchange_weak(ptr, ptr2, 43, memory_order_seq_cst, memory_order_acquire);
|
|
// CHECK: cmpxchg weak i32* {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z_.]+}} seq_cst acquire
|
|
|
|
// Unknown ordering: conservatively pick strongest valid option (for now!).
|
|
__atomic_compare_exchange(ptr2, ptr2, ptr2, 0, memory_order_acq_rel, *ptr2);
|
|
// CHECK: cmpxchg i32* {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z_.]+}} acq_rel acquire
|
|
|
|
// Undefined behaviour: don't really care what that last ordering is so leave
|
|
// it out:
|
|
__atomic_compare_exchange_n(ptr2, ptr2, 43, 1, memory_order_seq_cst, 42);
|
|
// CHECK: cmpxchg weak i32* {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z_.]+}} seq_cst
|
|
}
|
|
|
|
// CHECK-LABEL: @generalFailureOrder
|
|
void generalFailureOrder(_Atomic(int) *ptr, int *ptr2, int success, int fail) {
|
|
__c11_atomic_compare_exchange_strong(ptr, ptr2, 42, success, fail);
|
|
// CHECK: switch i32 {{.*}}, label %[[MONOTONIC:[0-9a-zA-Z._]+]] [
|
|
// CHECK-NEXT: i32 1, label %[[ACQUIRE:[0-9a-zA-Z._]+]]
|
|
// CHECK-NEXT: i32 2, label %[[ACQUIRE]]
|
|
// CHECK-NEXT: i32 3, label %[[RELEASE:[0-9a-zA-Z._]+]]
|
|
// CHECK-NEXT: i32 4, label %[[ACQREL:[0-9a-zA-Z._]+]]
|
|
// CHECK-NEXT: i32 5, label %[[SEQCST:[0-9a-zA-Z._]+]]
|
|
|
|
// CHECK: [[MONOTONIC]]
|
|
// CHECK: switch {{.*}}, label %[[MONOTONIC_MONOTONIC:[0-9a-zA-Z._]+]] [
|
|
// CHECK-NEXT: ]
|
|
|
|
// CHECK: [[ACQUIRE]]
|
|
// CHECK: switch {{.*}}, label %[[ACQUIRE_MONOTONIC:[0-9a-zA-Z._]+]] [
|
|
// CHECK-NEXT: i32 1, label %[[ACQUIRE_ACQUIRE:[0-9a-zA-Z._]+]]
|
|
// CHECK-NEXT: i32 2, label %[[ACQUIRE_ACQUIRE:[0-9a-zA-Z._]+]]
|
|
// CHECK-NEXT: ]
|
|
|
|
// CHECK: [[RELEASE]]
|
|
// CHECK: switch {{.*}}, label %[[RELEASE_MONOTONIC:[0-9a-zA-Z._]+]] [
|
|
// CHECK-NEXT: ]
|
|
|
|
// CHECK: [[ACQREL]]
|
|
// CHECK: switch {{.*}}, label %[[ACQREL_MONOTONIC:[0-9a-zA-Z._]+]] [
|
|
// CHECK-NEXT: i32 1, label %[[ACQREL_ACQUIRE:[0-9a-zA-Z._]+]]
|
|
// CHECK-NEXT: i32 2, label %[[ACQREL_ACQUIRE:[0-9a-zA-Z._]+]]
|
|
// CHECK-NEXT: ]
|
|
|
|
// CHECK: [[SEQCST]]
|
|
// CHECK: switch {{.*}}, label %[[SEQCST_MONOTONIC:[0-9a-zA-Z._]+]] [
|
|
// CHECK-NEXT: i32 1, label %[[SEQCST_ACQUIRE:[0-9a-zA-Z._]+]]
|
|
// CHECK-NEXT: i32 2, label %[[SEQCST_ACQUIRE:[0-9a-zA-Z._]+]]
|
|
// CHECK-NEXT: i32 5, label %[[SEQCST_SEQCST:[0-9a-zA-Z._]+]]
|
|
// CHECK-NEXT: ]
|
|
|
|
// CHECK: [[MONOTONIC_MONOTONIC]]
|
|
// CHECK: cmpxchg {{.*}} monotonic monotonic
|
|
// CHECK: br
|
|
|
|
// CHECK: [[ACQUIRE_MONOTONIC]]
|
|
// CHECK: cmpxchg {{.*}} acquire monotonic
|
|
// CHECK: br
|
|
|
|
// CHECK: [[ACQUIRE_ACQUIRE]]
|
|
// CHECK: cmpxchg {{.*}} acquire acquire
|
|
// CHECK: br
|
|
|
|
// CHECK: [[ACQREL_MONOTONIC]]
|
|
// CHECK: cmpxchg {{.*}} acq_rel monotonic
|
|
// CHECK: br
|
|
|
|
// CHECK: [[ACQREL_ACQUIRE]]
|
|
// CHECK: cmpxchg {{.*}} acq_rel acquire
|
|
// CHECK: br
|
|
|
|
// CHECK: [[SEQCST_MONOTONIC]]
|
|
// CHECK: cmpxchg {{.*}} seq_cst monotonic
|
|
// CHECK: br
|
|
|
|
// CHECK: [[SEQCST_ACQUIRE]]
|
|
// CHECK: cmpxchg {{.*}} seq_cst acquire
|
|
// CHECK: br
|
|
|
|
// CHECK: [[SEQCST_SEQCST]]
|
|
// CHECK: cmpxchg {{.*}} seq_cst seq_cst
|
|
// CHECK: br
|
|
}
|
|
|
|
void generalWeakness(int *ptr, int *ptr2, _Bool weak) {
|
|
__atomic_compare_exchange_n(ptr, ptr2, 42, weak, memory_order_seq_cst, memory_order_seq_cst);
|
|
// CHECK: switch i1 {{.*}}, label %[[WEAK:[0-9a-zA-Z._]+]] [
|
|
// CHECK-NEXT: i1 false, label %[[STRONG:[0-9a-zA-Z._]+]]
|
|
|
|
// CHECK: [[STRONG]]
|
|
// CHECK-NOT: br
|
|
// CHECK: cmpxchg {{.*}} seq_cst seq_cst
|
|
// CHECK: br
|
|
|
|
// CHECK: [[WEAK]]
|
|
// CHECK-NOT: br
|
|
// CHECK: cmpxchg weak {{.*}} seq_cst seq_cst
|
|
// CHECK: br
|
|
}
|
|
|
|
// Having checked the flow in the previous two cases, we'll trust clang to
|
|
// combine them sanely.
|
|
void EMIT_ALL_THE_THINGS(int *ptr, int *ptr2, int new, _Bool weak, int success, int fail) {
|
|
__atomic_compare_exchange(ptr, ptr2, &new, weak, success, fail);
|
|
|
|
// CHECK: = cmpxchg {{.*}} monotonic monotonic
|
|
// CHECK: = cmpxchg weak {{.*}} monotonic monotonic
|
|
// CHECK: = cmpxchg {{.*}} acquire monotonic
|
|
// CHECK: = cmpxchg {{.*}} acquire acquire
|
|
// CHECK: = cmpxchg weak {{.*}} acquire monotonic
|
|
// CHECK: = cmpxchg weak {{.*}} acquire acquire
|
|
// CHECK: = cmpxchg {{.*}} release monotonic
|
|
// CHECK: = cmpxchg weak {{.*}} release monotonic
|
|
// CHECK: = cmpxchg {{.*}} acq_rel monotonic
|
|
// CHECK: = cmpxchg {{.*}} acq_rel acquire
|
|
// CHECK: = cmpxchg weak {{.*}} acq_rel monotonic
|
|
// CHECK: = cmpxchg weak {{.*}} acq_rel acquire
|
|
// CHECK: = cmpxchg {{.*}} seq_cst monotonic
|
|
// CHECK: = cmpxchg {{.*}} seq_cst acquire
|
|
// CHECK: = cmpxchg {{.*}} seq_cst seq_cst
|
|
// CHECK: = cmpxchg weak {{.*}} seq_cst monotonic
|
|
// CHECK: = cmpxchg weak {{.*}} seq_cst acquire
|
|
// CHECK: = cmpxchg weak {{.*}} seq_cst seq_cst
|
|
}
|
|
|
|
#endif
|