35 lines · c
1// RUN: %clang_cc1 -triple riscv32 -O1 -emit-llvm %s -o - \2// RUN: -verify=no-atomics3// RUN: %clang_cc1 -triple riscv32 -target-feature +a -O1 -emit-llvm %s -o - \4// RUN: -verify=small-atomics5// RUN: %clang_cc1 -triple riscv64 -O1 -emit-llvm %s -o - \6// RUN: -verify=no-atomics7// RUN: %clang_cc1 -triple riscv64 -target-feature +a -O1 -emit-llvm %s -o - \8// RUN: -verify=all-atomics9 10// all-atomics-no-diagnostics11 12#include <stdatomic.h>13#include <stdint.h>14 15void test_i8_atomics(_Atomic(int8_t) * a, int8_t b) {16 __c11_atomic_load(a, memory_order_seq_cst); // no-atomics-warning {{large atomic operation may incur significant performance penalty; the access size (1 bytes) exceeds the max lock-free size (0 bytes)}}17 __c11_atomic_store(a, b, memory_order_seq_cst); // no-atomics-warning {{large atomic operation may incur significant performance penalty; the access size (1 bytes) exceeds the max lock-free size (0 bytes)}}18 __c11_atomic_fetch_add(a, b, memory_order_seq_cst); // no-atomics-warning {{large atomic operation may incur significant performance penalty; the access size (1 bytes) exceeds the max lock-free size (0 bytes)}}19}20 21void test_i32_atomics(_Atomic(int32_t) * a, int32_t b) {22 __c11_atomic_load(a, memory_order_seq_cst); // no-atomics-warning {{large atomic operation may incur significant performance penalty; the access size (4 bytes) exceeds the max lock-free size (0 bytes)}}23 __c11_atomic_store(a, b, memory_order_seq_cst); // no-atomics-warning {{large atomic operation may incur significant performance penalty; the access size (4 bytes) exceeds the max lock-free size (0 bytes)}}24 __c11_atomic_fetch_add(a, b, memory_order_seq_cst); // no-atomics-warning {{large atomic operation may incur significant performance penalty; the access size (4 bytes) exceeds the max lock-free size (0 bytes)}}25}26 27void test_i64_atomics(_Atomic(int64_t) * a, int64_t b) {28 __c11_atomic_load(a, memory_order_seq_cst); // no-atomics-warning {{large atomic operation may incur significant performance penalty; the access size (8 bytes) exceeds the max lock-free size (0 bytes)}}29 // small-atomics-warning@28 {{large atomic operation may incur significant performance penalty; the access size (8 bytes) exceeds the max lock-free size (4 bytes)}}30 __c11_atomic_store(a, b, memory_order_seq_cst); // no-atomics-warning {{large atomic operation may incur significant performance penalty; the access size (8 bytes) exceeds the max lock-free size (0 bytes)}}31 // small-atomics-warning@30 {{large atomic operation may incur significant performance penalty; the access size (8 bytes) exceeds the max lock-free size (4 bytes)}}32 __c11_atomic_fetch_add(a, b, memory_order_seq_cst); // no-atomics-warning {{large atomic operation may incur significant performance penalty; the access size (8 bytes) exceeds the max lock-free size (0 bytes)}}33 // small-atomics-warning@32 {{large atomic operation may incur significant performance penalty; the access size (8 bytes) exceeds the max lock-free size (4 bytes)}}34}35