/* { dg-do run } */
/* { dg-require-alias "" } */
/* { dg-options "-O2" } */
extern void abort (void);
int foo __asm__ ("foo") __attribute__((nocommon));
extern __typeof (foo) bar __attribute__ ((weak, alias ("foo")));
int
main (void)
{
if (&foo != &bar || foo || bar)
abort ();
return bar;
}
results in gas looping forever. That is of course also gas bug, but the output
from GCC for this testcase is wrong on all the architectures I tried.
The important part of ppc64 assembly is:
.weak bar
.lcomm bar,4,4
.type bar, @object
.globl foo
.lcomm foo,4,4
.type foo, @object
.weak bar
.set bar,foo
.weak bar
.set bar,foo
Note that although bar is just an alias and thus bar should be seen in the
assembly only in its uses, .weak bar and .set bar,foo, not as a separate
variable later on aliased to foo (and not twice either).
--
Summary: [4.0/4.1 Regression] Alias to nocommon variable fails to
assemble on ppc64
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jakub at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: ppc64-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20622
