When I try a C-only bootstrap with CLFAGS set to "-g -O2 -march=pentium-m",
this dies with an ICE while building libmudflap:
/home/arend/sources/gcc-head-build/gcc/xgcc
-B/home/arend/sources/gcc-head-build/gcc/
-B/usr/local/gcc-head/i686-pc-linux-gnu/bin/
-B/usr/local/gcc-head/i686-pc-linux-gnu/lib/
-isystem /usr/local/gcc-head/i686-pc-linux-gnu/include
-isystem/usr/local/gcc-head/i686-pc-linux-gnu/sys-include -DHAVE_CONFIG_H -I.
-I../../../gcc/libmudflap -I. -Wall -ffunction-sections -fdata-sections -O2 -g
-O2 -march=pentium-m -MT mf-runtime.lo -MD -MP -MF .deps/mf-runtime.Tpo
-c ../../../gcc/libmudflap/mf-runtime.c -o mf-runtime.o
../../../gcc/libmudflap/mf-runtime.c: In function ‘__mfu_check’:
../../../gcc/libmudflap/mf-runtime.c:1023: error: unrecognizable insn:
(insn 1279 1278 464 37 ../../../gcc/libmudflap/mf-runtime.c:866 (set
(reg/v/f:SI 22 xmm1 [orig:86 all_ovr_obj ] [86])
(plus:SI (reg/v/f:SI 22 xmm1 [orig:86 all_ovr_obj ] [86])
(const_int -28 [0xffffffe4]))) -1 (nil)
(expr_list:REG_EQUIV (plus:SI (reg/f:SI 6 bp)
(const_int -28 [0xffffffe4]))
(nil)))
../../../gcc/libmudflap/mf-runtime.c:1023: internal compiler error: in
extract_insn, at recog.c:2020
Please submit a full bug report,
with preprocessed source if appropriate.
I will attach pre-processed mf-runtime.i. This is with
(GCC) 4.0.0 20050120 (experimental)
I think about a week ago it still worked.
I can reproduce it with cc1 -O2 -march=pentium-m mf-runtime.i also with a
compiler bootstrapped with just CFLAGS="-g -O2".
--
Summary: ICE with -march=pentium-m (during bootstrap)
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: rtl-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: arend dot bayer at web dot de
CC: gcc-bugs at gcc dot gnu dot org
GCC host triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19556
