Hi, On Thu, 7 Apr 2011, Richard Guenther wrote:
> > 5600 newx = simplify_subreg (outermode, op, innermode, byte); > > (gdb) f 1 > > #1 0x0000000000708494 in expand_expr_real_2 (ops=0x7fffffffb0c0, > > target=0x0, > > tmode=VOIDmode, modifier=EXPAND_INITIALIZER) > > at /export/gnu/import/git/gcc-x32/gcc/expr.c:7366 > > 7366 op0 = simplify_gen_subreg (mode, op0, inner_mode, > > (gdb) call debug_tree (treeop0) > > <addr_expr 0x7ffff0a78d50 > > type <pointer_type 0x7ffff0b83f18 > > type <void_type 0x7ffff0b83e70 void VOID > > align 8 symtab 0 alias set -1 canonical type 0x7ffff0b83e70 > > pointer_to_this <pointer_type 0x7ffff0b83f18>> > > sizes-gimplified public unsigned SI > > arg 0 <label_decl 0x7ffff0b7b400 l2 type <void_type 0x7ffff0b83e70 void> > > (gdb) call debug_rtx (op0) > > (label_ref/v:DI 22) > > (gdb) > > > > First I wonder what CONSTANT_P object we arrive with here (it looks like > something unfolded, given that we likely came here with a NOP_EXPR). The CONSTANT_P object is the '(label_ref/v:DI 22)'. Not only CONST_INT are CONSTANT_P, also some others (symbol_ref too). Those might have a mode. Here the label_ref has DImode, but the pointer type in trees points to an SImode. The latter makes sense, because that's what ptr_mode is for HJs target. HJ: you'll need to tell us what you mean with 'breaks gcc.c-torture/compile/labels-3.c' . What breaks, in which way? Ciao, Michael.
