[Bug c/82556] New: internal compiler error in curr_insn_transform, at lra-constraints.c:4307

[bugzilla.gnu at coelho dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82556

            Bug ID: 82556
           Summary: internal compiler error in curr_insn_transform, at
                    lra-constraints.c:4307
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: bugzilla.gnu at coelho dot net
  Target Milestone: ---

Created attachment 42369
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42369&action=edit
preprocessed source

When compiling postgresql HEAD with gcc trunk, it fails on:

 pgsql/src/backend/access/transam> gcc --version
 gcc (GCC) 8.0.0 20171014 (experimental)
 Copyright (C) 2017 Free Software Foundation, Inc.
 This is free software; see the source for copying conditions.  There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

 pgsql/src/backend/access/transam> gcc -Wall -Wmissing-prototypes
-Wpointer-arith -Wdeclaration-after-statement -Wendif-labels
-Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv
-fexcess-precision=standard -O2 -I../../../../src/include  -D_GNU_SOURCE   -c
-o xloginsert.o xloginsert.i
 during RTL pass: reload
 xloginsert.c: In function ‘XLogInsert’:
 xloginsert.c:468:1: internal compiler error: in curr_insn_transform, at
lra-constraints.c:4307
  }
 ^
 0xbdfdbf curr_insn_transform
        ../../gcc-trunk-src/gcc/lra-constraints.c:4307
 0xbe1796 lra_constraints(bool)
        ../../gcc-trunk-src/gcc/lra-constraints.c:4833
 0xbcc594 lra(_IO_FILE*)
        ../../gcc-trunk-src/gcc/lra.c:2390
 0xb86a51 do_reload
        ../../gcc-trunk-src/gcc/ira.c:5440
 0xb86a51 execute
        ../../gcc-trunk-src/gcc/ira.c:5624
 Please submit a full bug report,
 with preprocessed source if appropriate.
 Please include the complete backtrace with any bug report.
 See <https://gcc.gnu.org/bugs/> for instructions.

The same code was compiling with a gcc 8.0.0 compiled on Oct 7, so the
regression is in the last week.