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* [Bug c/54391] New: transparent_union typedef'ing inconsistent
@ 2012-08-28 13:14 devel at fresse dot org
0 siblings, 0 replies; only message in thread
From: devel at fresse dot org @ 2012-08-28 13:14 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54391
Bug #: 54391
Summary: transparent_union typedef'ing inconsistent
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: devel@fresse.org
This works as expected:
union __attribute__((transparent_union)) m30_u {
uint32_t u;
};
typedef union m30_u m30_t;
static inline double
make_double(m30_t m)
{
return (double)m.u;
}
But typedef'ing upfront does not:
typedef union m30_u m30_t;
union __attribute__((transparent_union)) m30_u {
uint32_t u;
};
static inline double
make_double(m30_t m)
{
return (double)m.u;
}
...
uint32_t bar = 17;
make_double(bar);
....
transpu.c:27:2: error: incompatible type for argument 1 of 'make_double'
printf("%.6f\n", make_double());
transpu.c:11:1: note: expected 'm30_t' but argument is of type 'uint32_t'
This is very inconsistent.
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2012-08-28 13:14 [Bug c/54391] New: transparent_union typedef'ing inconsistent devel at fresse dot org
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