$ cat weak.c
extern void *__pthread_internal_tsd_address (void) __attribute__ ((__const__));
#pragma weak __pthread_internal_tsd_address
void f (void)
{
for (;;)
if (__pthread_internal_tsd_address ? __pthread_internal_tsd_address () : 0)
return;
}
$ gcc/xgcc -Bgcc -O2 -S weak.c
$ grep __pthread weak.s
br.call.sptk.many b0 = __pthread_internal_tsd_address#
addl r14 = @ltoff(@fptr(__pthread_internal_tsd_address#)), gp
.weak __pthread_internal_tsd_address#
__pthread_internal_tsd_address is called before being checked for NULL.
Broken by this change:
2004-07-09 Zdenek Dvorak <[EMAIL PROTECTED]>
* tree-ssa-loop-im.c: New file.
...
--
Summary: [4.0 regression] Weak const function mishandled inside
loop
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: critical
Priority: P2
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: schwab at suse dot de
CC: gcc-bugs at gcc dot gnu dot org,rakdver at atrey dot
karlin dot mff dot cuni dot cz
GCC target triplet: ia64-*-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19917
