[Bug bootstrap/95940] New: sparc64-linux bootstrap with gcc-9.3 broken

[hp at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95940

            Bug ID: 95940
           Summary: sparc64-linux bootstrap with gcc-9.3 broken
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hp at gcc dot gnu.org
  Target Milestone: ---

As seen on gcc202 at LAST_UPDATED:
Fri Jun 26 21:36:32 CEST 2020
Fri Jun 26 19:36:32 UTC 2020 (revision
0fce12c0920:2873383514d:0801f419440c14f6772b28f763ad7d40f7f7a580)
(a.k.a. r11-1677-g0801f419440c14f6772b28f763ad7d40f7f7a580)
using no configure options and no make options:

/home/hp/combcheck/o0/./prev-gcc/xg++ -B/home/hp/combcheck/o0/./prev-gcc/
-B/usr/local/sparc64-unknown-linux-gnu/bin/ -nostdinc++
-B/home/hp/combcheck/o0/prev-sparc64-unknown-linux-gnu/libstdc++-v3/src/.libs
-B/home/hp/combcheck/o0/prev-sparc64-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs

-I/home/hp/combcheck/o0/prev-sparc64-unknown-linux-gnu/libstdc++-v3/include/sparc64-unknown-linux-gnu
 -I/home/hp/combcheck/o0/prev-sparc64-unknown-linux-gnu/libstdc++-v3/include 
-I/home/hp/combcheck/gcc/libstdc++-v3/libsupc++
-L/home/hp/combcheck/o0/prev-sparc64-unknown-linux-gnu/libstdc++-v3/src/.libs
-L/home/hp/combcheck/o0/prev-sparc64-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs
 -fno-PIE -c   -g -O2 -fno-checking -gtoggle -DIN_GCC     -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/home/hp/combcheck/gcc/gcc -I/home/hp/combcheck/gcc/gcc/.
-I/home/hp/combcheck/gcc/gcc/../include
-I/home/hp/combcheck/gcc/gcc/../libcpp/include 
-I/home/hp/combcheck/gcc/gcc/../libdecnumber
-I/home/hp/combcheck/gcc/gcc/../libdecnumber/dpd -I../libdecnumber
-I/home/hp/combcheck/gcc/gcc/../libbacktrace   -o tree-ssanames.o -MT
tree-ssanames.o -MMD -MP -MF ./.deps/tree-ssanames.TPo
/home/hp/combcheck/gcc/gcc/tree-ssanames.c
In function ?wide_int get_nonzero_bits(const_tree)?,
    inlined from ?wide_int get_nonzero_bits(const_tree)? at
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:514:1:
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:527:46: error:
?<anonymous>.generic_wide_int<wide_int_storage>::<anonymous>.wide_int_storage::val[1]?
may be used uninitialized [-Werror=maybe-uninitialized]
  527 |     | (HOST_WIDE_INT) pi->misalign, precision);
      |                                              ^
/home/hp/combcheck/gcc/gcc/tree-ssanames.c: In function ?wide_int
get_nonzero_bits(const_tree)?:
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:527:46: note: ?<anonymous>? declared
here
  527 |     | (HOST_WIDE_INT) pi->misalign, precision);
      |                                              ^
In function ?wide_int get_nonzero_bits(const_tree)?,
    inlined from ?wide_int get_nonzero_bits(const_tree)? at
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:514:1:
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:527:46: error:
?<anonymous>.generic_wide_int<wide_int_storage>::<anonymous>.wide_int_storage::val[2]?
may be used uninitialized [-Werror=maybe-uninitialized]
  527 |     | (HOST_WIDE_INT) pi->misalign, precision);
      |                                              ^
/home/hp/combcheck/gcc/gcc/tree-ssanames.c: In function ?wide_int
get_nonzero_bits(const_tree)?:
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:527:46: note: ?<anonymous>? declared
here
  527 |     | (HOST_WIDE_INT) pi->misalign, precision);
      |                                              ^
In function ?wide_int get_nonzero_bits(const_tree)?,
    inlined from ?wide_int get_nonzero_bits(const_tree)? at
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:514:1:
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:528:37: error:
?<anonymous>.generic_wide_int<wide_int_storage>::<anonymous>.wide_int_storage::val[1]?
may be used uninitialized [-Werror=maybe-uninitialized]
  528 |       return wi::shwi (-1, precision);
      |                                     ^
/home/hp/combcheck/gcc/gcc/tree-ssanames.c: In function ?wide_int
get_nonzero_bits(const_tree)?:
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:528:37: note: ?<anonymous>? declared
here
  528 |       return wi::shwi (-1, precision);
      |                                     ^
In function ?wide_int get_nonzero_bits(const_tree)?,
    inlined from ?wide_int get_nonzero_bits(const_tree)? at
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:514:1:
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:528:37: error:
?<anonymous>.generic_wide_int<wide_int_storage>::<anonymous>.wide_int_storage::val[2]?
may be used uninitialized [-Werror=maybe-uninitialized]
  528 |       return wi::shwi (-1, precision);
      |                                     ^
/home/hp/combcheck/gcc/gcc/tree-ssanames.c: In function ?wide_int
get_nonzero_bits(const_tree)?:
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:528:37: note: ?<anonymous>? declared
here
  528 |       return wi::shwi (-1, precision);
      |                                     ^
In function ?wide_int get_nonzero_bits(const_tree)?,
    inlined from ?wide_int get_nonzero_bits(const_tree)? at
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:514:1:
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:533:35: error:
?<anonymous>.generic_wide_int<wide_int_storage>::<anonymous>.wide_int_storage::val[1]?
may be used uninitialized [-Werror=maybe-uninitialized]
  533 |     return wi::shwi (-1, precision);
      |                                   ^
/home/hp/combcheck/gcc/gcc/tree-ssanames.c: In function ?wide_int
get_nonzero_bits(const_tree)?:
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:533:35: note: ?<anonymous>? declared
here
  533 |     return wi::shwi (-1, precision);
      |                                   ^
In function ?wide_int get_nonzero_bits(const_tree)?,
    inlined from ?wide_int get_nonzero_bits(const_tree)? at
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:514:1:
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:533:35: error:
?<anonymous>.generic_wide_int<wide_int_storage>::<anonymous>.wide_int_storage::val[2]?
may be used uninitialized [-Werror=maybe-uninitialized]
  533 |     return wi::shwi (-1, precision);
      |                                   ^
/home/hp/combcheck/gcc/gcc/tree-ssanames.c: In function ?wide_int
get_nonzero_bits(const_tree)?:
/home/hp/combcheck/gcc/gcc/tree-ssanames.c:533:35: note: ?<anonymous>? declared
here
  533 |     return wi::shwi (-1, precision);
      |                                   ^
cc1plus: all warnings being treated as errors
make[3]: *** [Makefile:1124: tree-ssanames.o] Error 1
make[3]: Leaving directory '/home/hp/combcheck/o0/gcc'
make[2]: *** [Makefile:4783: all-stage2-gcc] Error 2
make[2]: Leaving directory '/home/hp/combcheck/o0'
make[1]: *** [Makefile:24260: stage2-bubble] Error 2
make[1]: Leaving directory '/home/hp/combcheck/o0'
make: *** [Makefile:998: all] Error 2