https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86442
Bug ID: 86442
Summary: Wrong error: global register variable follows a
function definition when using LTO
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: rejects-valid
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: hubicka at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
Following wrong error is printed with LTO:
$ cat global.cpp
register int a __asm__("r12");
class b {
public:
b();
};
b c;
int main() { a = 3; }
$ g++ global.cpp -O2 -flto
global.cpp: In function ‘main’:
global.cpp:1:14: error: global register variable follows a function definition
register int a __asm__("r12");
^
lto-wrapper: fatal error: g++ returned 1 exit status
compilation terminated.
/usr/lib64/gcc/x86_64-suse-linux/8/../../../../x86_64-suse-linux/bin/ld: error:
lto-wrapper failed
collect2: error: ld returned 1 exit status
