The attached testcase distilled from elfxx-mips.c gives an ICE with -O1 and
above.
/src/tmp/mips_miscompile.i:16: error: unrecognizable insn:
(insn:HI 12 14 13 0 (set (subreg:SI (reg:DI 120) 4)
(plus:SI (mem/s:SI (reg/v/f:SI 119 [ s ]) [4 <variable>.size+0 S4 A32])
(const_int -16 [0xfffffffffffffff0]))) -1 (insn_list:REG_DEP_TRUE 6
(insn_list:REG_DEP_TRUE 14 (nil)))
(nil))
/src/tmp/mips_miscompile.i:16: internal compiler error: in extract_insn, at
recog.c:2020
--
Summary: unrecognizable insn building binutils
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: amodra at bigpond dot net dot au
CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: powerpc-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20203
