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From: "duanbo3 at huawei dot com" <gcc-bugzilla@gcc.gnu.org>
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Date: Tue, 17 Mar 2020 02:21:59 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94201

            Bug ID: 94201
           Summary: aarch64=EF=BC=9AICE in tiny code model for ilp32
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: duanbo3 at huawei dot com
  Target Milestone: ---
            Target: aarch64

Created attachment 48048
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D48048&action=3Dedit
mcmodel_tiny_for_ilp32.patch

hello
I find an ICE when testing GCC10.0 on aarch64 at -mabi=3Dilp32 -fPIC=20
-mcmodel=3Dtiny:

Simple test case
---
extern int bar (void *);
extern long long a;=20

int
foo (void)
{
  a=3D1;
  return bar ((void *)bar);
}
---
GCC version:
gcc version 10.0.1 20200312 (experimental)

Runcommand:
gcc new_test.c -mabi=3Dilp32 -fPIC  -mcmodel=3Dtiny  -S -o poc.s

Result:
./new_test.c: In function 'foo':
./new_test.c:14:1: error: unrecognizable insn:
(insn 11 10 12 2 (set (reg:SI 0 x0)
        (unspec:DI [
                (symbol_ref:SI ("bar") [flags 0x41] <function_decl
0xffffa0cb3b00 bar>)
            ] UNSPEC_GOTTINYPIC)) "./new_test.c":13:10 -1
     (expr_list:REG_EQUAL (symbol_ref:SI ("bar") [flags 0x41] <function_decl
0xffffa0cb3b00 bar>)
        (nil)))
during RTL pass: vregs
./new_test.c:14:1: internal compiler error: in extract_insn, at recog.c:2294
0x62858b _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        ../.././gcc/rtl-error.c:108
0x6285b7 _fatal_insn_not_found(rtx_def const*, char const*, int, char const=
*)
        ../.././gcc/rtl-error.c:116
0xc9aa7f extract_insn(rtx_insn*)
        ../.././gcc/recog.c:2294
0x9c8917 instantiate_virtual_regs_in_insn
        ../.././gcc/function.c:1607
0x9c8917 instantiate_virtual_regs
        ../.././gcc/function.c:1977
0x9c8917 execute
        ../.././gcc/function.c:2026=