[Bug target/86348] New: [9 Regression] ICE: in curr_insn_transform, at lra-constraints.c:3919: unable to generate reloads for: vec_extractv4si_0_zext_sse4

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86348

            Bug ID: 86348
           Summary: [9 Regression] ICE: in curr_insn_transform, at
                    lra-constraints.c:3919: unable to generate reloads
                    for: vec_extractv4si_0_zext_sse4
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: i686-pc-linux-gnu

Created attachment 44336
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44336&action=edit
reduced testcase

Compiler output:
$ i686-pc-linux-gnu-gcc -O -mtune=athlon -msse4 testcase.c
testcase.c: In function 'foo':
testcase.c:9:1: error: unable to generate reloads for:
 }
 ^
(insn 12 11 13 2 (set (reg:DI 101)
        (zero_extend:DI (vec_select:SI (reg:V4SI 90 [ _4 ])
                (parallel [
                        (const_int 0 [0])
                    ])))) "testcase.c":8 3463 {*vec_extractv4si_0_zext_sse4}
     (expr_list:REG_DEAD (reg:V4SI 90 [ _4 ])
        (nil)))
during RTL pass: reload
testcase.c:9:1: internal compiler error: in curr_insn_transform, at
lra-constraints.c:3919
0x58bc11 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /repo/gcc-trunk/gcc/rtl-error.c:108
0xa6dbb1 curr_insn_transform
        /repo/gcc-trunk/gcc/lra-constraints.c:3919
0xa6e5ce lra_constraints(bool)
        /repo/gcc-trunk/gcc/lra-constraints.c:4906
0xa54c5c lra(_IO_FILE*)
        /repo/gcc-trunk/gcc/lra.c:2420
0x9f9119 do_reload
        /repo/gcc-trunk/gcc/ira.c:5465
0x9f9119 execute
        /repo/gcc-trunk/gcc/ira.c:5649
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.

$ i686-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-i686/bin/i686-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-262221-checking-yes-rtl-df-extra-i686/bin/../libexec/gcc/i686-pc-linux-gnu/9.0.0/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl --with-sysroot=/usr/i686-pc-linux-gnu
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=i686-pc-linux-gnu --with-ld=/usr/bin/i686-pc-linux-gnu-ld
--with-as=/usr/bin/i686-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-262221-checking-yes-rtl-df-extra-i686
Thread model: posix
gcc version 9.0.0 20180628 (experimental) (GCC)