http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60649
Bug ID: 60649
Summary: [ASAN] Bogus "'y' may be used uninitialized" warning
(affects bootstrap-asan)
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Keywords: build, diagnostic
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: burnus at gcc dot gnu.org
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org
Created attachment 32446
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32446&action=edit
C++ Test case (test.ii); compile as: g++ -O2 -fsanitize=address
-Werror=maybe-uninitialized test.ii
The following issue prevents bootstrapping GCC with
--with-build-config=bootstrap-asan: gcc/explow.c:83:7: error: y may be used
uninitialized in this function
The reduced test case compiles warning free without ASAN, but with ASAN one
gets:
$ g++ -O2 -fsanitize=address -Werror=maybe-uninitialized test12.ii
test12.ii: In function ‘rtx_def* plus_constant(machine_mode, rtx, long int)’:
test12.ii:22:7: error: ‘y’ may be used uninitialized in this function
[-Werror=maybe-uninitialized]
rtx y;
^
cc1plus: some warnings being treated as errors
