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From: "codemasterhs at yahoo dot de" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/39620] New: wrong assumption of clobbered registers of inline assembly Date: Fri, 03 Apr 2009 07:55:00 -0000 [thread overview] Message-ID: <bug-39620-16316@http.gcc.gnu.org/bugzilla/> (raw) [-- Warning: decoded text below may be mangled, UTF-8 assumed --] [-- Attachment #1: Type: text/plain, Size: 1041 bytes --] I have the following code: static inline void zeromem4b(uint32t *dst, uint32t count) { asm volatile("xor %%eax,%%eax\n\trep stosl" : :"c"(count),"D"(dst) :"%eax", "cc", "memory"); } If I call it and after it want to, e.g. print out the value of *dst it gives me the value which it has after running the function. That means that gcc thinks that "%edi" hasn´t changed, but it did and I can not put it into the clobbered list, because this gives me an error. I compile with "-O2 -Wall -fno-builtin -march=i586". -- Summary: wrong assumption of clobbered registers of inline assembly Product: gcc Version: 4.3.3 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: codemasterhs at yahoo dot de GCC host triplet: cygwin GCC target triplet: i586 elf http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39620
next reply other threads:[~2009-04-03 7:55 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2009-04-03 7:55 codemasterhs at yahoo dot de [this message] 2009-04-03 8:11 ` [Bug c/39620] " jakub at gcc dot gnu dot org 2009-04-03 8:30 ` codemasterhs at yahoo dot de
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