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reload1.c (gen_mode_int): New function. 

* reload1.c (gen_mode_int): New function.
        (reload_cse_move2add): Use it to generate the new constants.

From-SVN: r26834
This commit is contained in:
Andreas Schwab 1999-05-08 01:34:55 +00:00 committed by Richard Henderson
parent e9996db741
commit ccc4ae070d
2 changed files with 30 additions and 4 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Sat May 8 01:34:19 1999 Andreas Schwab <schwab@issan.cs.uni-dortmund.de>
* reload1.c (gen_mode_int): New function.
(reload_cse_move2add): Use it to generate the new constants.
Sat May 8 01:25:09 1999 Andreas Schwab <schwab@issan.cs.uni-dortmund.de>
* varasm.c (output_constant): Do nothing if -fsyntax-only.

29
gcc/reload1.c
View File

@ -9962,6 +9962,24 @@ static enum machine_mode reg_mode[FIRST_PSEUDO_REGISTER];
reload_cse_move2add and move2add_note_store. */
static int move2add_luid;
/* Generate a CONST_INT and force it in the range of MODE. */
static rtx
gen_mode_int (mode, value)
enum machine_mode mode;
HOST_WIDE_INT value;
{
HOST_WIDE_INT cval = value & GET_MODE_MASK (mode);
int width = GET_MODE_BITSIZE (mode);
/* If MODE is narrower than HOST_WIDE_INT and CVAL is a negative number,
sign extend it. */
if (width > 0 && width < HOST_BITS_PER_WIDE_INT
&& (cval & ((HOST_WIDE_INT) 1 << (width - 1))) != 0)
cval |= (HOST_WIDE_INT) -1 << width;
return GEN_INT (cval);
}
static void
reload_cse_move2add (first)
rtx first;
@ -10013,8 +10031,9 @@ reload_cse_move2add (first)
if (GET_CODE (src) == CONST_INT && reg_base_reg[regno] < 0)
{
int success = 0;
rtx new_src = GEN_INT (INTVAL (src)
- INTVAL (reg_offset[regno]));
rtx new_src
= gen_mode_int (GET_MODE (reg),
INTVAL (src) - INTVAL (reg_offset[regno]));
/* (set (reg) (plus (reg) (const_int 0))) is not canonical;
use (set (reg) (reg)) instead.
We don't delete this insn, nor do we convert it into a
@ -10059,8 +10078,10 @@ reload_cse_move2add (first)
&& GET_CODE (XEXP (SET_SRC (set), 1)) == CONST_INT)
{
rtx src3 = XEXP (SET_SRC (set), 1);
rtx new_src = GEN_INT (INTVAL (src3)
- INTVAL (reg_offset[regno]));
rtx new_src
= gen_mode_int (GET_MODE (reg),
INTVAL (src3)
- INTVAL (reg_offset[regno]));
int success = 0;
if (new_src == const0_rtx)