https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65859
Bug ID: 65859
Summary: Optimizes out TLS variable called in a child function
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: inline-asm
Assignee: unassigned at gcc dot gnu.org
Reporter: mike at cchtml dot com
Created attachment 35391
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35391&action=edit
test case
When compiled with -O0 the test case compiles. When compiled with -O1 the test
case will not compile with an error for an undefined reference to the TLS
variable. If you move the THREAD_VAR_OFFSET macro call to main() gcc will
compile without error. Enabling -O1 and turning off optimizations by hand does
not change the result.
I see the same issue with gcc 4.8, 4.9, and 5.0.
