[Bug rtl-optimization/80375] New: [5/6/7 Regression] ICE in expand_expr_real_2, at expr.c:9382 with -ftrapv

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80375

            Bug ID: 80375
           Summary: [5/6/7 Regression] ICE in expand_expr_real_2, at
                    expr.c:9382 with -ftrapv
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

Starting from 5.1, there's ICE:

$ gcc /home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/pr38934.c -ftrapv -m32
-c

/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/pr38934.c: In function ‘f’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/pr38934.c:14:13: warning:
integer constant is so large that it is unsigned
   if (p >= -9223372036854775808LL - (signed char) g)
             ^~~~~~~~~~~~~~~~~~~~~
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/pr38934.c:14:35: internal
compiler error: in expand_expr_real_2, at expr.c:9382
   if (p >= -9223372036854775808LL - (signed char) g)
            ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
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