[Bug middle-end/126775] New: [17 Regression] ICE: tree check: expected real_cst, have vector_cst in generic_simplify_MINUS_EXPR, at generic-match-6.cc:7470 with -ffinite-math-only

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126775

            Bug ID: 126775
           Summary: [17 Regression] ICE: tree check: expected real_cst,
                    have vector_cst in generic_simplify_MINUS_EXPR, at
                    generic-match-6.cc:7470 with -ffinite-math-only
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu

Created attachment 65285
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65285&action=edit
reduced testcase

Compiler output:
$ x86_64-pc-linux-gnu-gcc -ffinite-math-only testcase.c 
testcase.c: In function 'foo':
testcase.c:3:1: internal compiler error: tree check: expected real_cst, have
vector_cst in generic_simplify_MINUS_EXPR, at generic-match-6.cc:7470
    3 | void foo() { 0 - f; }
      | ^~~~
0x2ebea5d internal_error(char const*, ...)
        /repo/gcc-trunk/gcc/diagnostic-global-context.cc:787
0x93d7b5 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
        /repo/gcc-trunk/gcc/tree.cc:9218
0x9f1c34 tree_check(tree_node*, char const*, int, char const*, tree_code)
        /repo/gcc-trunk/gcc/tree.h:3831
0x9f1c34 generic_simplify_MINUS_EXPR(unsigned long, tree_code, tree_node*,
tree_node*, tree_node*)
        /repo/build-gcc-trunk-amd64/gcc/generic-match-6.cc:7470
0x11c89ec fold_binary_loc(unsigned long, tree_code, tree_node*, tree_node*,
tree_node*)
        /repo/gcc-trunk/gcc/fold-const.cc:10894
0x11e6a28 fold(tree_node*)
        /repo/gcc-trunk/gcc/fold-const.cc:13339
0xf1f2b2 c_fully_fold_internal
        /repo/gcc-trunk/gcc/c/c-fold.cc:393
0xf1f8eb c_fully_fold(tree_node*, bool, bool*, bool)
        /repo/gcc-trunk/gcc/c/c-fold.cc:124
0xe9627f c_process_expr_stmt(unsigned long, tree_node*)
        /repo/gcc-trunk/gcc/c/c-typeck.cc:13900
0xe9655d c_finish_expr_stmt(unsigned long, tree_node*)
        /repo/gcc-trunk/gcc/c/c-typeck.cc:13945
0xf0caaf c_parser_statement_after_labels
        /repo/gcc-trunk/gcc/c/c-parser.cc:8558
0xf152d6 c_parser_compound_statement_nostart
        /repo/gcc-trunk/gcc/c/c-parser.cc:7958
0xf15557 c_parser_compound_statement
        /repo/gcc-trunk/gcc/c/c-parser.cc:7172
0xf0c342 c_parser_declaration_or_fndef
        /repo/gcc-trunk/gcc/c/c-parser.cc:3354
0xf1ab4b c_parser_external_declaration
        /repo/gcc-trunk/gcc/c/c-parser.cc:2256
0xf1b9f8 c_parser_translation_unit
        /repo/gcc-trunk/gcc/c/c-parser.cc:2095
0xf1b9f8 c_parse_file()
        /repo/gcc-trunk/gcc/c/c-parser.cc:31491
0xfa3591 c_common_parse_file()
        /repo/gcc-trunk/gcc/c-family/c-opts.cc:1437
/repo/gcc-trunk/binary-trunk-20260810164908-r17-3189-gbaa4e4ddf80060-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/17.0.0/cc1
-quiet -iprefix
/repo/gcc-trunk/binary-trunk-20260810164908-r17-3189-gbaa4e4ddf80060-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../lib/gcc/x86_64-pc-linux-gnu/17.0.0/
testcase.c -quiet -dumpdir a- -dumpbase testcase.c -dumpbase-ext .c
-mtune=generic -march=x86-64 -ffinite-math-only -o /tmp/ccBfogJt.s
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-20260810164908-r17-3189-gbaa4e4ddf80060-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/17.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--disable-bootstrap --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --enable-libsanitizer
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-20260810164908-r17-3189-gbaa4e4ddf80060-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 17.0.0 20260810 (experimental) (GCC)