[Bug target/99663] New: [11 Regression] ICE in extract_constrain_insn, at recog.c:2670 on s390x-linux-gnu

["doko at debian dot org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99663

            Bug ID: 99663
           Summary: [11 Regression] ICE in extract_constrain_insn, at
                    recog.c:2670 on s390x-linux-gnu
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at debian dot org
  Target Milestone: ---

trunk 20210319 ftbfs on s390x-linux-gnu, with

../../../src/libgcc/../libdecnumber/decNumber.c: In function
‘decQuantizeOp.constprop.isra’:
../../../src/libgcc/../libdecnumber/decNumber.c:5966:3: error: insn does not
satisfy its constraints:
 5966 |   } /* decQuantizeOp */
      |   ^
(insn 252 250 253 26 (set (reg:DI 2 %r2)
        (plus:DI (reg/v/f:DI 24 %f8 [orig:101 res ] [101])
            (const_int 10 [0xa]))) 1471 {*la_64}
     (nil))
during RTL pass: postreload
../../../src/libgcc/../libdecnumber/decNumber.c:5966:3: internal compiler
error: in extract_constrain_insn, at recog.c:2670
0x218b329 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        ../../src/gcc/rtl-error.c:108
0x218b4b5 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        ../../src/gcc/rtl-error.c:118
0x20d66a1 extract_constrain_insn(rtx_insn*)
        ../../src/gcc/recog.c:2670
0x2047e77 reload_cse_simplify_operands
        ../../src/gcc/postreload.c:407
0x2045e61 reload_cse_simplify
        ../../src/gcc/postreload.c:132
0x2046ff1 reload_cse_regs_1
        ../../src/gcc/postreload.c:238
0x204555b reload_cse_regs
        ../../src/gcc/postreload.c:66
0x2056935 execute
        ../../src/gcc/postreload.c:2358
Please submit a full bug report,
with preprocessed source if appropriate.

make[5]: *** [Makefile:646: decNumber.o] Error 1
make[5]: *** Waiting for unfinished jobs....
make[5]: Leaving directory '/<<PKGBUILDDIR>>/build/s390x-linux-gnu/libgcc'
make[4]: *** [Makefile:20021: all-stage1-target-libgcc] Error 2
make[4]: Leaving directory '/<<PKGBUILDDIR>>/build'
make[3]: *** [Makefile:27139: stage1-bubble] Error 2
make[3]: Leaving directory '/<<PKGBUILDDIR>>/build'
make[2]: *** [Makefile:28089: profiledbootstrap-lean] Error 2
make[2]: Leaving directory '/<<PKGBUILDDIR>>/build'

gcc configured with

         --enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++
         --with-gcc-major-version-only
         --enable-shared
         --enable-linker-build-id
         --without-included-gettext
         --enable-threads=posix
         --enable-nls
         --enable-bootstrap
         --enable-clocale=gnu
         --enable-libstdcxx-debug
         --enable-libstdcxx-time=yes
         --with-default-libstdcxx-abi=new
         --enable-gnu-unique-object
         --disable-libquadmath
         --disable-libquadmath-support
         --enable-plugin
         --enable-default-pie
         --with-system-zlib
         --enable-libphobos-checking=release
         --with-target-system-zlib=auto
         --enable-objc-gc=auto
         --enable-multiarch
         --disable-werror
         --with-arch=z13
         --with-tune=z15
         --enable-s390-excess-float-precision
         --with-long-double-128
         --enable-multilib
         --enable-checking=yes,extra,rtl
         --build=s390x-linux-gnu
         --host=s390x-linux-gnu
         --target=s390x-linux-gnu
         --with-build-config=bootstrap-lto-lean
         --enable-link-serialization=2