[Bug target/100332] New: mcore-elf: error: 'prev_addr' may be used uninitialized in this function [-Werror=maybe-uninitialized]

[Bug target/100332] New: mcore-elf: error: 'prev_addr' may be used uninitialized in this function [-Werror=maybe-uninitialized]

[jbglaw@lug-owl.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100332

            Bug ID: 100332
           Summary: mcore-elf: error: 'prev_addr' may be used
                    uninitialized in this function
                    [-Werror=maybe-uninitialized]
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jbglaw@lug-owl.de
  Target Milestone: ---

I'm revamping my testing efforts, building cross compilers based on targets
listed in ./contrib/config-list.mk.

With .../configure --target=mcore-elf --enable-werror-always
--enable-languages=all --prefix=/tmp/gcc-mcore-elf (using g++ (Debian
20210320-1) 11.0.1 20210320 (experimental) [master revision
3279a9a5a9a:6526c452d22:5f256a70a05fcfc5a1caf56678ceb12b4f87f781] as the host's
compiler), build breaks (as of 37846c42f1f5ac4d9ba190d49c4373673c89c8b5) with
this (cf. http://toolchain.lug-owl.de:8080/jobs/gcc-mcore-elf/11):

make all-gcc
[...]
all 2021-04-29 09:39:37.528923] /usr/lib/gcc-snapshot/bin/g++  -fno-PIE -c   -g
-O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE   -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wno-error=format-diag -Wmissing-format-attribute
-Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings -Werror -fno-common  -DHAVE_CONFIG_H -I. -I.
-I../.././gcc -I../.././gcc/. -I../.././gcc/../include
-I../.././gcc/../libcpp/include -I../.././gcc/../libcody 
-I../.././gcc/../libdecnumber -I../.././gcc/../libdecnumber/dpd
-I../libdecnumber -I../.././gcc/../libbacktrace   -o dwarf2out.o -MT
dwarf2out.o -MMD -MP -MF ./.deps/dwarf2out.TPo ../.././gcc/dwarf2out.c
[all 2021-04-29 09:40:06.839260] ../.././gcc/dwarf2out.c: In function 'void
output_one_line_info_table(dw_line_info_table*)':
[all 2021-04-29 09:40:06.839476] ../.././gcc/dwarf2out.c:12831:82: error:
'prev_addr' may be used uninitialized in this function
[-Werror=maybe-uninitialized]
[all 2021-04-29 09:40:06.839552] 12831 |            
ASM_GENERATE_INTERNAL_LABEL (prev_label, LINE_CODE_LABEL, prev_addr->val);
[all 2021-04-29 09:40:06.839627]       |                                       
                                          ^~~
[all 2021-04-29 09:41:39.466117] cc1plus: all warnings being treated as errors
[all 2021-04-29 09:41:39.525930] make[1]: *** [Makefile:1141: dwarf2out.o]
Error 1
[all 2021-04-29 09:41:39.578999] make[1]: Leaving directory
'/var/lib/laminar/run/gcc-mcore-elf/11/gcc/host-x86_64-pc-linux-gnu/gcc'
[all 2021-04-29 09:41:39.818955] make: *** [Makefile:4428: all-gcc] Error 2


Thanks,
Jan-Benedict

[Bug target/100332] mcore-elf: error: 'prev_addr' may be used uninitialized in this function [-Werror=maybe-uninitialized]

[jbglaw@lug-owl.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100332

Jan-Benedict Glaw <jbglaw@lug-owl.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |WORKSFORME
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #1 from Jan-Benedict Glaw <jbglaw@lug-owl.de> ---
Looking at ma latest builds, this issue is fixed already.