Consider this file:
#include <stdio.h>
int x = 1;
int main ()
{
asm goto ("decl %0; jnz %l[a]" :: "m"(x) : "memory" : a);
printf ("Hello world\n");
a:
return 0;
}
It compiles and links correctly without LTO.
But with LTO, "gcc-4.5.0 -flto a.c", there is an error:
In file included from :0:0:
a.c: In function 'main':
a.c:7:2: error: invalid 'asm': operand number out of range
lto-wrapper: /usr/bin/gcc-4.5.0 returned 1 exit status
collect2: lto-wrapper returned 1 exit status
--
Summary: "asm goto" does not work with LTO
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: richardpku at gmail dot com
GCC build triplet: x86_64-pc-linux-gnu
GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44184
