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ia64.c (symbolic_operand): Reject CONST expressions with the low 13 bits set.

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* config/ia64/ia64.c (symbolic_operand): Reject CONST expressions
        with the low 13 bits set.
        (move_operand): Check for CONST|SYMBOL_REF|LABEL_REF directly.
        * config/ia64/ia64.md (movdi): Likewise.  Expand a CONST with one
        of the low 13 bits into a CONST plus an adddi3.
        (load_symptr): Set RTX_UNCHANGING_P.

From-SVN: r34821
This commit is contained in:
Richard Henderson 2000-07-01 14:20:32 -07:00 • committed by Richard Henderson
parent 442bd896c0
commit dee4095a02
3 changed files with 50 additions and 7 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2000-07-01 Richard Henderson <rth@cygnus.com>
* config/ia64/ia64.c (symbolic_operand): Reject CONST expressions
with the low 13 bits set.
(move_operand): Check for CONST|SYMBOL_REF|LABEL_REF directly.
* config/ia64/ia64.md (movdi): Likewise. Expand a CONST with one
of the low 13 bits into a CONST plus an adddi3.
(load_symptr): Set RTX_UNCHANGING_P.
2000-06-30 Mark Mitchell <mark@codesourcery.com>
* Makefile.in (c-common.o): Don't depend on c-tree.h or c-lex.h.

19
gcc/config/ia64/ia64.c
View file

@ -186,6 +186,20 @@ symbolic_operand (op, mode)
switch (GET_CODE (op))
{
case CONST:
op = XEXP (op, 0);
if (GET_CODE (op) != PLUS)
return 0;
if (GET_CODE (XEXP (op, 0)) != SYMBOL_REF)
return 0;
op = XEXP (op, 1);
if (GET_CODE (op) != CONST_INT)
return 0;
/* Force the low 13 bits of the constant to zero so that we do not
use up so many GOT entries. */
if (! TARGET_NO_PIC && ! TARGET_AUTO_PIC && (INTVAL (op) & 0x1fff) != 0)
return 0;
return 1;
case SYMBOL_REF:
case LABEL_REF:
return 1;
@ -270,7 +284,10 @@ move_operand (op, mode)
rtx op;
enum machine_mode mode;
{
if (! TARGET_NO_PIC && symbolic_operand (op, mode))
if (! TARGET_NO_PIC
&& (GET_CODE (op) == CONST
|| GET_CODE (op) == SYMBOL_REF
|| GET_CODE (op) == LABEL_REF))
return 0;
return general_operand (op, mode);

29
gcc/config/ia64/ia64.md
View file

@ -255,7 +255,10 @@
{
/* ??? Should generalize this, so that we can also support 32 bit
pointers. */
if (! TARGET_NO_PIC && symbolic_operand (operands[1], DImode))
if (! TARGET_NO_PIC
&& (GET_CODE (operands[1]) == CONST
|| GET_CODE (operands[1]) == SYMBOL_REF
|| GET_CODE (operands[1]) == LABEL_REF))
{
rtx temp;
@ -273,6 +276,21 @@
emit_insn (gen_load_fptr (temp, operands[1]));
else if (sdata_symbolic_operand (operands[1], DImode))
emit_insn (gen_load_gprel (temp, operands[1]));
else if (GET_CODE (operands[1]) == CONST
&& GET_CODE (XEXP (operands[1], 0)) == PLUS
&& GET_CODE (XEXP (XEXP (operands[1], 0), 1)) == CONST_INT
&& (INTVAL (XEXP (XEXP (operands[1], 0), 1)) & 0x1fff) != 0)
{
HOST_WIDE_INT ofs = INTVAL (XEXP (XEXP (operands[1], 0), 1));
rtx sym = XEXP (XEXP (operands[1], 0), 0);
rtx subtarget = no_new_pseudos ? temp : gen_reg_rtx (DImode);
sym = plus_constant (sym, ofs & ~(HOST_WIDE_INT)0x1fff);
ofs &= 0x1fff;
emit_insn (gen_load_symptr (subtarget, sym));
emit_insn (gen_adddi3 (temp, subtarget, GEN_INT (ofs)));
}
else
emit_insn (gen_load_symptr (temp, operands[1]));
@ -358,14 +376,13 @@
(define_expand "load_symptr"
[(set (match_dup 2)
(plus:DI (reg:DI 1) (match_operand:DI 1 "symbolic_operand" "")))
(set (match_operand:DI 0 "register_operand" "") (mem:DI (match_dup 2)))]
(set (match_operand:DI 0 "register_operand" "") (match_dup 3))]
""
"
{
if (reload_in_progress)
operands[2] = operands[0];
else
operands[2] = gen_reg_rtx (DImode);
operands[2] = reload_in_progress ? operands[0] : gen_reg_rtx (DImode);
operands[3] = gen_rtx_MEM (DImode, operands[2]);
RTX_UNCHANGING_P (operands[3]) = 1;
}")
(define_insn "*load_symptr_internal1"