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Subject: [Bug middle-end/47598] -fgraphite-identity at -O2 breaks profiledbootstrap
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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?