On 07/14/2011 03:03 AM, Bernd Schmidt wrote: > +++ gcc/config/ia64/ia64.c (working copy) > @@ -1047,7 +1047,7 @@ > tmp = gen_rtx_PLUS (Pmode, tmp, pic_offset_table_rtx); > emit_insn (gen_rtx_SET (VOIDmode, dest, tmp)); > > - tmp = gen_rtx_LO_SUM (Pmode, dest, src); > + tmp = gen_rtx_LO_SUM (Pmode, gen_rtx_MEM (Pmode, dest), src);
And the bug stems from ... what? Is this bug still fixed if you change this to gen_const_mem? This is a load from the .got. It's constant memory, and it's always present. There's nowhere in the function that we cannot move this load (assuming the address is computed properly) where this load will fail. It's difficult to tell if your raw gen_rtx_MEM with no aliasing info doesn't just paper over a problem by preventing it from being moved. r~
