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From: "bangerth at dealii dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/33810] gcc 4.1.2 mangles results on x86_64 in bitfield operations Date: Sun, 13 Jan 2008 06:51:00 -0000 [thread overview] Message-ID: <20080113031024.30124.qmail@sourceware.org> (raw) In-Reply-To: <bug-33810-12095@http.gcc.gnu.org/bugzilla/> ------- Comment #1 from bangerth at dealii dot org 2008-01-13 03:10 ------- Confirmed. Here's a slightly simplified testcase: -----------bar.h------------ typedef struct { unsigned : 16; unsigned : 16; } foo; -----------bar.c------------ #include <stdio.h> #include <bar.h> foo bar(unsigned i) { printf("bar: i is %u.\n",i); foo myfoo; return myfoo; } -------------foo.cc------------ #include <stdio.h> #include <bar.h> extern "C" foo bar(unsigned int); int main(void) { foo myfoo; unsigned i = 3; printf("foo: i is %u.\n",i); myfoo = bar(i); return 0; } ------------------- tmp/g> gcc -I. -c bar.c tmp/g> g++ -I. -o foo foo.c bar.o tmp/g> ./foo foo: i is 3. bar: i is 1289971520. Something appears to go wrong when calling the extern "C" function... This is a wrong-code regression on valid code. W. -- bangerth at dealii dot org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |bangerth at dealii dot org, | |mmitchel at gcc dot gnu dot | |org Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Keywords| |wrong-code Last reconfirmed|0000-00-00 00:00:00 |2008-01-13 03:10:24 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33810
next prev parent reply other threads:[~2008-01-13 3:11 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2007-10-18 10:33 [Bug c++/33810] New: " satyaakam at yahoo dot co dot in 2008-01-13 6:51 ` bangerth at dealii dot org [this message] 2008-01-13 17:00 ` [Bug c++/33810] " mmitchel at gcc dot gnu dot org 2008-01-13 18:23 ` [Bug c++/33810] [4.1 Regression] " rguenth at gcc dot gnu dot org 2008-07-04 16:16 ` jsm28 at gcc dot gnu dot org
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