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* [Bug c/52615] New: function pointer casting bug @ 2012-03-19 13:21 cglbftm at gmail dot com 2012-03-19 14:10 ` [Bug c/52615] " rguenth at gcc dot gnu.org 2014-02-05 10:43 ` mpolacek at gcc dot gnu.org 0 siblings, 2 replies; 3+ messages in thread From: cglbftm at gmail dot com @ 2012-03-19 13:21 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52615 Bug #: 52615 Summary: function pointer casting bug Classification: Unclassified Product: gcc Version: 4.6.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned@gcc.gnu.org ReportedBy: cglbftm@gmail.com gcc compiler can't create any working code for my programm. Full programm here: int a(char x) { return x; } int main() { float result; result = (*(float (*)(double, int, char *))a)(4.5f, 7, "Hello"); return 0; } gcc input: gcc main.c gcc output: main.c: In function 'main': main.c:10:48: warning: function called through a non-compatible type [enabled by default] main.c:10:48: note: if this code is reached, the program will abort Compiler create executable file. But it doesn't work. Other compilers(g++, MSVC 10) works fine. No warnings and working programm. ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c/52615] function pointer casting bug 2012-03-19 13:21 [Bug c/52615] New: function pointer casting bug cglbftm at gmail dot com @ 2012-03-19 14:10 ` rguenth at gcc dot gnu.org 2014-02-05 10:43 ` mpolacek at gcc dot gnu.org 1 sibling, 0 replies; 3+ messages in thread From: rguenth at gcc dot gnu.org @ 2012-03-19 14:10 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52615 Richard Guenther <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jsm28 at gcc dot gnu.org --- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-03-19 13:20:36 UTC --- I believe your program invokes undefined behavior. But, since 4.7 we can DWIM, the middle-end should be able to handle a local differing call ABI by means of gimple_call_fntype which can be different from the type of the FUNCTION_DECL we refer to. I think the only requirement for the frontends is that the function in the CALL_EXPR is (fntype2 *)&f with f being of fntype1. ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c/52615] function pointer casting bug 2012-03-19 13:21 [Bug c/52615] New: function pointer casting bug cglbftm at gmail dot com 2012-03-19 14:10 ` [Bug c/52615] " rguenth at gcc dot gnu.org @ 2014-02-05 10:43 ` mpolacek at gcc dot gnu.org 1 sibling, 0 replies; 3+ messages in thread From: mpolacek at gcc dot gnu.org @ 2014-02-05 10:43 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52615 Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED CC| |mpolacek at gcc dot gnu.org Resolution|--- |FIXED --- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> --- I'd say fixed by r207300. ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2014-02-05 10:43 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-03-19 13:21 [Bug c/52615] New: function pointer casting bug cglbftm at gmail dot com 2012-03-19 14:10 ` [Bug c/52615] " rguenth at gcc dot gnu.org 2014-02-05 10:43 ` mpolacek at gcc dot gnu.org
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