[Bug target/82725] New: [8 Regression] [i386] internal compiler error: in change_address_1, at emit-rtl.c:2162

["ibuclaw at gdcproject dot org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82725

            Bug ID: 82725
           Summary: [8 Regression] [i386] internal compiler error: in
                    change_address_1, at emit-rtl.c:2162
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ibuclaw at gdcproject dot org
  Target Milestone: ---

Reduced test, triggered only if compiling with -fPIE and affects multiple
front-ends.
---
struct string
{
  __SIZE_TYPE__ length;
  const char *ptr;
};

string tempDir()
{
    thread_local string cache;
    return cache;
}
---

during RTL pass: split2
file.cc: In function ‘string tempDir()’:
file.cc:11:1: internal compiler error: in change_address_1, at emit-rtl.c:2162
 }
 ^
0x58cddf change_address_1
        ../../dev/gcc/emit-rtl.c:2162
0x89d98d adjust_address_1(rtx_def*, machine_mode, long, int, int, int, long)
        ../../dev/gcc/emit-rtl.c:2300
0xe19010 split_double_mode(machine_mode, rtx_def**, int, rtx_def**, rtx_def**)
        ../../dev/gcc/config/i386/i386.c:19985
0xe1a72b ix86_split_to_parts
        ../../dev/gcc/config/i386/i386.c:26573
0xe23056 ix86_split_long_move(rtx_def**)
        ../../dev/gcc/config/i386/i386.c:26662
0x1009005 gen_split_23(rtx_insn*, rtx_def**)
        ../../dev/gcc/config/i386/i386.md:2362
0x125d437 split_12
        ../../dev/gcc/config/i386/i386.md:1016
0x125f74c split_18
        ../../dev/gcc/config/i386/i386.md:6491
0x12690a0 split_insns(rtx_def*, rtx_insn*)
        ../../dev/gcc/config/i386/i386.md:12747
0x89fb74 try_split(rtx_def*, rtx_insn*, int)
        ../../dev/gcc/emit-rtl.c:3692
0xad1071 split_insn
        ../../dev/gcc/recog.c:2882
0xad5da7 split_all_insns()
        ../../dev/gcc/recog.c:2971
0xad5e68 execute
        ../../dev/gcc/recog.c:3883
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.

---

This has been happening since mid-September at least.

$ g++ --version
g++ (GCC) 8.0.0 20170918 (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.