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(init_expr_once): Try indexing mem by fp as well as sp.

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From-SVN: r2760
This commit is contained in:
Richard Stallman 1992-11-20 19:02:25 +00:00
parent 2513f07a89
commit e254999710
1 changed files with 15 additions and 0 deletions
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15
gcc/expr.c
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@ -139,7 +139,11 @@ init_expr_once ()
{
rtx insn, pat;
enum machine_mode mode;
/* Try indexing by frame ptr and try by stack ptr.
It is known that on the Convex the stack ptr isn't a valid index.
With luck, one or the other is valid on any machine. */
rtx mem = gen_rtx (MEM, VOIDmode, stack_pointer_rtx);
rtx mem1 = gen_rtx (MEM, VOIDmode, frame_pointer_rtx);
start_sequence ();
insn = emit_insn (gen_rtx (SET, 0, 0));
@ -154,6 +158,7 @@ init_expr_once ()
direct_load[(int) mode] = direct_store[(int) mode] = 0;
PUT_MODE (mem, mode);
PUT_MODE (mem1, mode);
/* See if there is some register that can be used in this mode and
directly loaded or stored from memory. */
@ -173,10 +178,20 @@ init_expr_once ()
if (recog (pat, insn, &num_clobbers) >= 0)
direct_load[(int) mode] = 1;
SET_SRC (pat) = mem1;
SET_DEST (pat) = reg;
if (recog (pat, insn, &num_clobbers) >= 0)
direct_load[(int) mode] = 1;
SET_SRC (pat) = reg;
SET_DEST (pat) = mem;
if (recog (pat, insn, &num_clobbers) >= 0)
direct_store[(int) mode] = 1;
SET_SRC (pat) = reg;
SET_DEST (pat) = mem1;
if (recog (pat, insn, &num_clobbers) >= 0)
direct_store[(int) mode] = 1;
}
movstr_optab[(int) mode] = CODE_FOR_nothing;