49 lines
2.0 KiB
C
49 lines
2.0 KiB
C
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// RUN: %clang_cc1 -triple aarch64-linux-gnu %s -emit-llvm -o /dev/null -verify
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typedef struct {
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int a, b;
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} IntPair;
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typedef struct {
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long long a;
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} LongStruct;
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typedef int __attribute__((aligned(1))) unaligned_int;
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void func(IntPair *p) {
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IntPair res;
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__atomic_load(p, &res, 0); // expected-warning {{misaligned atomic operation may incur significant performance penalty; the expected alignment (8 bytes) exceeds the actual alignment (4 bytes)}}
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__atomic_store(p, &res, 0); // expected-warning {{misaligned atomic operation may incur significant performance penalty; the expected alignment (8 bytes) exceeds the actual alignment (4 bytes)}}
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__atomic_fetch_add((unaligned_int *)p, 1, 2); // expected-warning {{misaligned atomic operation may incur significant performance penalty; the expected alignment (4 bytes) exceeds the actual alignment (1 bytes)}}
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__atomic_fetch_sub((unaligned_int *)p, 1, 3); // expected-warning {{misaligned atomic operation may incur significant performance penalty; the expected alignment (4 bytes) exceeds the actual alignment (1 bytes)}}
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}
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void func1(LongStruct *p) {
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LongStruct res;
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__atomic_load(p, &res, 0);
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__atomic_store(p, &res, 0);
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__atomic_fetch_add((int *)p, 1, 2);
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__atomic_fetch_sub((int *)p, 1, 3);
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}
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typedef struct {
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void *a;
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void *b;
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} Foo;
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typedef struct {
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void *a;
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void *b;
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void *c;
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void *d;
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} __attribute__((aligned(32))) ThirtyTwo;
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void braz(Foo *foo, ThirtyTwo *braz) {
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Foo bar;
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__atomic_load(foo, &bar, __ATOMIC_RELAXED); // expected-warning {{misaligned atomic operation may incur significant performance penalty; the expected alignment (16 bytes) exceeds the actual alignment (8 bytes)}}
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ThirtyTwo thirtyTwo1;
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ThirtyTwo thirtyTwo2;
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__atomic_load(&thirtyTwo1, &thirtyTwo2, __ATOMIC_RELAXED); // expected-warning {{large atomic operation may incur significant performance penalty; the access size (32 bytes) exceeds the max lock-free size (16 bytes)}}
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}
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