[Bug rtl-optimization/83629] New: [7/8 Regression] ICE: in decompose_normal_address, at rtlanal.c:6329 with -O2 -fPIC -frename-registers --param=sched-autopref-queue-depth=nnn

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83629

            Bug ID: 83629
           Summary: [7/8 Regression] ICE: in decompose_normal_address, at
                    rtlanal.c:6329 with -O2 -fPIC -frename-registers
                    --param=sched-autopref-queue-depth=nnn
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---
              Host: powerpc-unknown-linux-gnu
            Target: powerpc-unknown-linux-gnu

Created attachment 42989
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42989&action=edit
reduced testcase

Similar to PR68834, which is failing in gcc-6 only.

Compiler output:
$ powerpc-unknown-linux-gnu-gcc -O2 -fPIC -frename-registers
--param=sched-autopref-queue-depth=0 testcase.c 
during RTL pass: sched2
testcase.c: In function 'foo':
testcase.c:7:1: internal compiler error: in decompose_normal_address, at
rtlanal.c:6329
 }
 ^
0xbc783b decompose_normal_address
        /repo/gcc-trunk/gcc/rtlanal.c:6329
0xbc783b decompose_address(address_info*, rtx_def**, machine_mode, unsigned
char, rtx_code)
        /repo/gcc-trunk/gcc/rtlanal.c:6406
0x13f66f2 analyze_set_insn_for_autopref
        /repo/gcc-trunk/gcc/haifa-sched.c:5535
0x13f8d51 autopref_multipass_init
        /repo/gcc-trunk/gcc/haifa-sched.c:5621
0x1400056 autopref_rank_for_schedule
        /repo/gcc-trunk/gcc/haifa-sched.c:5644
0x1400056 rank_for_schedule
        /repo/gcc-trunk/gcc/haifa-sched.c:2715
0x140049c swap_sort
        /repo/gcc-trunk/gcc/haifa-sched.c:2818
0x140049c ready_sort_real
        /repo/gcc-trunk/gcc/haifa-sched.c:3085
0x1409418 schedule_block(basic_block_def**, void*)
        /repo/gcc-trunk/gcc/haifa-sched.c:6675
0xbd268a schedule_region
        /repo/gcc-trunk/gcc/sched-rgn.c:3174
0xbd268a schedule_insns()
        /repo/gcc-trunk/gcc/sched-rgn.c:3513
0xbd2b0d schedule_insns()
        /repo/gcc-trunk/gcc/sched-rgn.c:3498
0xbd2b0d rest_of_handle_sched2
        /repo/gcc-trunk/gcc/sched-rgn.c:3737
0xbd2b0d execute
        /repo/gcc-trunk/gcc/sched-rgn.c:3873
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.


Any value of the --param=sched-autopref-queue-depth=0 param seems to cause the
ICE.


$ powerpc-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-powerpc/bin/powerpc-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-255981-checking-yes-rtl-df-extra-nographite-powerpc/bin/../libexec/gcc/powerpc-unknown-linux-gnu/8.0.0/lto-wrapper
Target: powerpc-unknown-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--without-cloog --without-ppl --without-isl
--with-sysroot=/usr/powerpc-unknown-linux-gnu
--target=powerpc-unknown-linux-gnu --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=powerpc-unknown-linux-gnu
--with-ld=/usr/bin/powerpc-unknown-linux-gnu-ld
--with-as=/usr/bin/powerpc-unknown-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-255981-checking-yes-rtl-df-extra-nographite-powerpc
Thread model: posix
gcc version 8.0.0 20171222 (experimental) (GCC)