http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47598
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> 2011-02-03 15:52:50 UTC --- (In reply to comment #0) > Enabling -fgraphite at -O2 with... > > /sw/src/fink.build/gcc46-4.6.0-1000/darwin_objdir/./prev-gcc/xgcc > -B/sw/src/fink.build/gcc46-4.6.0-1000/darwin_objdir/./prev-gcc/ > -B/sw/lib/gcc4.6/x86_64-apple-darwin10.7.0/bin/ > -B/sw/lib/gcc4.6/x86_64-apple-darwin10.7.0/bin/ > -B/sw/lib/gcc4.6/x86_64-apple-darwin10.7.0/lib/ -isystem > /sw/lib/gcc4.6/x86_64-apple-darwin10.7.0/include -isystem > /sw/lib/gcc4.6/x86_64-apple-darwin10.7.0/sys-include -c -DHAVE_CONFIG_H -g > -O2 -mdynamic-no-pic -flto=jobserver -frandom-seed=1 -fprofile-use -I. > -I../../gcc-4.6-20110202/libiberty/../include -W -Wall -Wwrite-strings > -Wc++-compat -Wstrict-prototypes -pedantic > ../../gcc-4.6-20110202/libiberty/cp-demangle.c -o cp-demangle.o > ../../gcc-4.6-20110202/libiberty/cp-demangle.c: In function 'd_print_comp': > ../../gcc-4.6-20110202/libiberty/cp-demangle.c:4350:1: error: insn does not > satisfy its constraints: > (insn 1855 310 311 39 (parallel [ > (set (reg/f:DI 4 si [orig:719 dpi_17(D)->modifiers ] [719]) > (plus:DI (reg:DI 4 si [486]) > (plus:DI (reg/f:DI 7 sp) > (const_int 0 [0])))) > (clobber (reg:CC 17 flags)) > ]) ../../gcc-4.6-20110202/libiberty/cp-demangle.c:3611 253 {*adddi_1} > (nil)) > ../../gcc-4.6-20110202/libiberty/cp-demangle.c:4350:1: internal compiler > error: > in reload_cse_simplify_operands, at postreload.c:401 Can you create a standalone testcase to show this -fgraphite-identity -O2 bug?