[Bug c++/17115] New: -Winline does not respect __attribute__((__noinline__))
markus at oberhumer dot com
gcc-bugzilla@gcc.gnu.org
Fri Aug 20 06:15:00 GMT 2004
This is could be regarded as a feature or missing documentation, but I was very
suprised finding out that -Winline does not respect _attribute__((__noinline__)).
Consider this code:
struct Foo {
__attribute__((noinline)) int a(int r) { return r & 1; }
virtual __attribute__((noinline)) int b(int r) { return r & 1; }
static __attribute__((noinline)) int c(int r) { return r & 1; }
};
int bar(int r) {
Foo f;
int k = 1; k &= f.a(r); k &= f.b(r); k &= f.a(r);
return k;
}
> g++-3.5 -O2 -Winline -c x.cpp
x.cpp: In function `int bar(int)':
x.cpp:2: warning: inlining failed in call to 'int Foo::a(int)': function not
inlinable
x.cpp:9: warning: called from here
x.cpp:3: warning: inlining failed in call to 'virtual int Foo::b(int)': function
not inlinable
x.cpp:9: warning: called from here
x.cpp:2: warning: inlining failed in call to 'int Foo::a(int)': function not
inlinable
x.cpp:9: warning: called from here
Somewhat related is the usage of both -Winline and -fno-default-inline - I would
expect that -Winline would ignore non-inlines that result from
-fno-default-inline but still warns about other (e.g. global) non-inlined
functions. But currently it warns about every member function.
--
Summary: -Winline does not respect __attribute__((__noinline__))
Product: gcc
Version: 3.5.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: markus at oberhumer dot com
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17115
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