https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117165
--- Comment #1 from Zdenek Sojka <zsojka at seznam dot cz> ---
Similar, with __builtin_ia32_fnclex():
$ echo 'void foo() { __builtin_ia32_fnclex(); }' | x86_64-pc-linux-gnu-gcc
-mno-80387 -xc -
<stdin>: In function 'foo':
<stdin>:1:39: error: unrecognizable insn:
(insn 5 2 0 2 (unspec_volatile [
(const_int 0 [0])
] UNSPECV_FNCLEX) "<stdin>":1:14 -1
(nil))
during RTL pass: vregs
<stdin>:1:39: internal compiler error: in extract_insn, at recog.cc:2882
0x2c886fe internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:517
0xe83167 fancy_abort(char const*, int, char const*)
/repo/gcc-trunk/gcc/diagnostic.cc:1535
0x83772f _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/repo/gcc-trunk/gcc/rtl-error.cc:108
0x8377ac _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/repo/gcc-trunk/gcc/rtl-error.cc:116
0x82652f extract_insn(rtx_insn*)
/repo/gcc-trunk/gcc/recog.cc:2882
0x11e355f instantiate_virtual_regs_in_insn
/repo/gcc-trunk/gcc/function.cc:1661
0x11e355f instantiate_virtual_regs
/repo/gcc-trunk/gcc/function.cc:1995
0x11e355f execute
/repo/gcc-trunk/gcc/function.cc:2042
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
