23 lines
576 B
C
23 lines
576 B
C
/* Test volatile access to unaligned field. */
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/* { dg-do compile } */
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/* { dg-options "-fno-strict-volatile-bitfields -fdump-rtl-final" } */
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#define test_type unsigned short
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typedef struct s{
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unsigned char Prefix[1];
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volatile test_type Type;
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}__attribute((__packed__,__aligned__(4))) ss;
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extern volatile ss v;
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void
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foo (test_type u)
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{
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v.Type = u;
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}
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/* The C++ memory model forbids data store race conditions outside the
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unaligned data member, therefore only QI or HI access is allowed, no SI. */
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/* { dg-final { scan-rtl-dump-not "mem/v(/.)*:SI" "final" } } */
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