https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66358
--- Comment #19 from David Binderman <dcb314 at hotmail dot com> --- (In reply to David Binderman from comment #17) > I had a go at cross compiling Linux kernel for sh, and got something similar > with gcc 5.1.1 dated 20150618 With recent gcc trunk on x86_64, I get $ ~/gcc/results/bin/gcc -c -O3 -march=native gcc.target/i386/pr70300.c gcc.target/i386/pr70300.c: In function ‘bar’: gcc.target/i386/pr70300.c:25:1: error: insn does not satisfy its constraints: } ^ (insn 127 98 128 2 (set (reg:V4SF 53 xmm16 [125]) (vec_select:V4SF (vec_concat:V8SF (reg:V4SF 53 xmm16 [125]) (reg:V4SF 53 xmm16 [125])) (parallel [ (const_int 0 [0]) (const_int 4 [0x4]) (const_int 1 [0x1]) (const_int 5 [0x5]) ]))) gcc.target/i386/pr70300.c:21 2460 {vec_interleave_lowv4sf} (nil)) gcc.target/i386/pr70300.c:25:1: internal compiler error: in extract_constrain_insn, at recog.c:2190 0xb7d207 _fatal_insn(char const*, rtx_def const*, char const*, int, char const*) ../../src/trunk/gcc/rtl-error.c:108 0xb7d23f _fatal_insn_not_found(rtx_def const*, char const*, int, char const*) ../../src/trunk/gcc/rtl-error.c:119 0xb3b39e extract_constrain_insn(rtx_insn*) ../../src/trunk/gcc/recog.c:2190 0xb47120 copyprop_hardreg_forward_1 ../../src/trunk/gcc/regcprop.c:774 0xb47f91 execute ../../src/trunk/gcc/regcprop.c:1280 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <http://gcc.gnu.org/bugs.html> for instructions. $ But if I remove the -march=native, all goes well: $ ~/gcc/results/bin/gcc -c -O3 gcc.target/i386/pr70300.c $ Exact CPU model seems to be model name : AMD Phenom(tm) II X4 970 Processor