http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49721
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> 2011-08-02 15:58:56 UTC --- (In reply to comment #6) > (In reply to comment #5) > > Another testcase: > > Program received signal SIGSEGV, Segmentation fault. > try_combine (i3=<optimized out>, i2=<optimized out>, i1=0x0, i0=<optimized > out>, new_direct_jump_p=0x7fffffffdf54, > last_combined_insn=0x7ffff1a12c60) at > ../../gcc-svn/trunk/gcc/combine.c:4154 > 4154 if (link->insn == i2) > > #0 try_combine (i3=<optimized out>, i2=<optimized out>, i1=0x0, i0=<optimized > out>, new_direct_jump_p=0x7fffffffdf54, > last_combined_insn=0x7ffff1a12c60) at > ../../gcc-svn/trunk/gcc/combine.c:4154 That is because simplify-rtx.c generates new insns via convert_memory_address_addr_space.
