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
