[Bug bootstrap/103899] New: make profiledbootstrap fails due to uninitialized warning in expr.c

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103899

            Bug ID: 103899
           Summary: make profiledbootstrap fails due to uninitialized
                    warning in expr.c
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: build, diagnostic
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

I am filing this and will attach the preprocessed source in a few minutes:
/home/apinski/src/upstream-gcc/gcc/objdir1/./prev-gcc/xg++
-B/home/apinski/src/upstream-gcc/gcc/objdir1/./prev-gcc/
-B/usr/local/x86_64-pc-linux-gnu/bin/ -nostdinc++
-B/home/apinski/src/upstream-gcc/gcc/objdir1/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-B/home/apinski/src/upstream-gcc/gcc/objdir1/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs

-I/home/apinski/src/upstream-gcc/gcc/objdir1/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu

-I/home/apinski/src/upstream-gcc/gcc/objdir1/prev-x86_64-pc-linux-gnu/libstdc++-v3/include
 -I/home/apinski/src/upstream-gcc/gcc/libstdc++-v3/libsupc++
-L/home/apinski/src/upstream-gcc/gcc/objdir1/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/home/apinski/src/upstream-gcc/gcc/objdir1/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
 -fno-PIE -c   -g -O2 -fno-checking -gtoggle -fprofile-generate -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../../gcc -I../../gcc/. -I../../gcc/../include -I../../gcc/../libcpp/include
-I../../gcc/../libcody -I/home/apinski/src/upstream-gcc/gcc/objdir1/./gmp
-I/home/apinski/src/upstream-gcc/gcc/gmp
-I/home/apinski/src/upstream-gcc/gcc/objdir1/./mpfr/src
-I/home/apinski/src/upstream-gcc/gcc/mpfr/src
-I/home/apinski/src/upstream-gcc/gcc/mpc/src  -I../../gcc/../libdecnumber
-I../../gcc/../libdecnumber/bid -I../libdecnumber -I../../gcc/../libbacktrace
-I/home/apinski/src/upstream-gcc/gcc/objdir1/./isl/include
-I/home/apinski/src/upstream-gcc/gcc/isl/include  -o expr.o -MT expr.o -MMD -MP
-MF ./.deps/expr.TPo ../../gcc/expr.c
In file included from ../../gcc/expr.c:26:
../../gcc/tree.h: In function ‘rtx_def* expand_expr_real_1(tree, rtx,
machine_mode, expand_modifier, rtx_def**, bool)’:
../../gcc/tree.h:244:56: error: ‘context’ may be used uninitialized in this
function [-Werror=maybe-uninitialized]
  244 | #define TREE_CODE(NODE) ((enum tree_code) (NODE)->base.code)
      |                                                        ^~~~
../../gcc/expr.c:10343:8: note: ‘context’ was declared here
10343 |   tree context;
      |        ^~~~~~~
cc1plus: all warnings being treated as errors
Makefile:1143: recipe for target 'expr.o' failed
make[3]: *** [expr.o] Error 1

I just did:
mkdir objdir1
cd objdir1
../configure
make profiledbootstrap

I tried to get a reduced testcase but I think there is a missing jump threading
so it just happen to work for the reduced testcase I tried.