http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60937
Bug ID: 60937
Summary: -Os -fprofile-arcs breaks __attribute__((error()))
Product: gcc
Version: 4.8.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: kirill at shutemov dot name
Created attachment 32660
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32660&action=edit
Reduced test case
Use of -Os and -fprofile-arcs break __attribute__((error())) behavior on
attached test case. It false-positively triggers compile time error:
$ gcc -Wall -Os -fprofile-arcs -c -o mm/.tmp_gup.o gup.i
gup.i: In function ‘__get_user_pages’:
gup.i:29:44: error: call to ‘__compiletime_assert’ declared with attribute
error: BUILD_BUG failed
__compiletime_assert();
Switching to other optimization level (above 0) or remove -fprofile-arcs does
not lead to that:
$ gcc -Wall -O1 -fprofile-arcs -c -o mm/.tmp_gup.o gup.i
$ gcc -Wall -Os -c -o mm/.tmp_gup.o gup.i
