[Bug middle-end/59327] New: warning in expand_used_vars

[amylaar at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59327

            Bug ID: 59327
           Summary: warning in expand_used_vars
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Keywords: build
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: amylaar at gcc dot gnu.org
                CC: jakub at redhat dot com

Code added this morning to cfgexpand.c:expand_used_vars causes a warning:

g++ -c   -g  -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE  -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -pedantic -Wno-long-long
-Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common 
-DHAVE_CONFIG_H -I. -I. -I../../gcc/gcc -I../../gcc/gcc/.
-I../../gcc/gcc/../include -I../../gcc/gcc/../libcpp/include 
-I../../gcc/gcc/../libdecnumber -I../../gcc/gcc/../libdecnumber/dpd
-I../libdecnumber -I../../gcc/gcc/../libbacktrace    -o cfgexpand.o -MT
cfgexpand.o -MMD -MP -MF ./.deps/cfgexpand.TPo ../../gcc/gcc/cfgexpand.c
../../gcc/gcc/cfgexpand.c: In function ‘rtx_def* expand_used_vars()’:
../../gcc/gcc/cfgexpand.c:1836:35: error: comparison between signed and
unsigned integer expressions [-Werror=sign-compare]
        && sz + ASAN_RED_ZONE_SIZE >= data.asan_alignb)
                                   ^
cc1plus: all warnings being treated as errors
make: *** [cfgexpand.o] Error 1


Seen for target arc-elf.
[amylaar@rowan gcc]$ g++ --version
g++ (GCC) 4.9.0 20131126 (experimental)
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[amylaar@rowan gcc]$ uname -a
Linux rowan 3.11.7-200.fc19.i686.PAE #1 SMP Mon Nov 4 14:22:33 UTC 2013 i686
i686 i386 GNU/Linux