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Make more use of GET_MODE_UNIT_BITSIZE

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This patch is like the previous GET_MODE_UNIT_SIZE one,
but for bit rather than byte sizes.

2017-10-13  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* cfgexpand.c (expand_debug_expr): Use GET_MODE_UNIT_BITSIZE.
	(expand_debug_source_expr): Likewise.
	* combine.c (combine_simplify_rtx): Likewise.
	* cse.c (fold_rtx): Likewise.
	* fwprop.c (canonicalize_address): Likewise.
	* targhooks.c (default_shift_truncation_mask): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r253716
This commit is contained in:
Richard Sandiford 2017-10-13 09:53:00 +00:00 committed by Richard Sandiford
parent fb98441af9
commit 250a60f387
6 changed files with 28 additions and 11 deletions
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11
gcc/ChangeLog
View File

@ -1,3 +1,14 @@
2017-10-13 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
* cfgexpand.c (expand_debug_expr): Use GET_MODE_UNIT_BITSIZE.
(expand_debug_source_expr): Likewise.
* combine.c (combine_simplify_rtx): Likewise.
* cse.c (fold_rtx): Likewise.
* fwprop.c (canonicalize_address): Likewise.
* targhooks.c (default_shift_truncation_mask): Likewise.
2017-10-13 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>

12
gcc/cfgexpand.c
View File

@ -4326,9 +4326,11 @@ expand_debug_expr (tree exp)
if (FLOAT_MODE_P (mode) && FLOAT_MODE_P (inner_mode))
{
if (GET_MODE_BITSIZE (mode) == GET_MODE_BITSIZE (inner_mode))
if (GET_MODE_UNIT_BITSIZE (mode)
== GET_MODE_UNIT_BITSIZE (inner_mode))
op0 = simplify_gen_subreg (mode, op0, inner_mode, 0);
else if (GET_MODE_BITSIZE (mode) < GET_MODE_BITSIZE (inner_mode))
else if (GET_MODE_UNIT_BITSIZE (mode)
< GET_MODE_UNIT_BITSIZE (inner_mode))
op0 = simplify_gen_unary (FLOAT_TRUNCATE, mode, op0, inner_mode);
else
op0 = simplify_gen_unary (FLOAT_EXTEND, mode, op0, inner_mode);
@ -5191,9 +5193,11 @@ expand_debug_source_expr (tree exp)
if (FLOAT_MODE_P (mode) && FLOAT_MODE_P (inner_mode))
{
if (GET_MODE_BITSIZE (mode) == GET_MODE_BITSIZE (inner_mode))
if (GET_MODE_UNIT_BITSIZE (mode)
== GET_MODE_UNIT_BITSIZE (inner_mode))
op0 = simplify_gen_subreg (mode, op0, inner_mode, 0);
else if (GET_MODE_BITSIZE (mode) < GET_MODE_BITSIZE (inner_mode))
else if (GET_MODE_UNIT_BITSIZE (mode)
< GET_MODE_UNIT_BITSIZE (inner_mode))
op0 = simplify_gen_unary (FLOAT_TRUNCATE, mode, op0, inner_mode);
else
op0 = simplify_gen_unary (FLOAT_EXTEND, mode, op0, inner_mode);

3
gcc/combine.c
View File

@ -6304,7 +6304,8 @@ combine_simplify_rtx (rtx x, machine_mode op0_mode, int in_dest,
SUBST (XEXP (x, 1),
force_to_mode (XEXP (x, 1), GET_MODE (XEXP (x, 1)),
(HOST_WIDE_INT_1U
<< exact_log2 (GET_MODE_BITSIZE (GET_MODE (x))))
<< exact_log2 (GET_MODE_UNIT_BITSIZE
(GET_MODE (x))))
- 1,
0));
break;

7
gcc/cse.c
View File

@ -3612,7 +3612,7 @@ fold_rtx (rtx x, rtx_insn *insn)
{
if (SHIFT_COUNT_TRUNCATED)
canon_const_arg1 = GEN_INT (INTVAL (const_arg1)
& (GET_MODE_BITSIZE (mode)
& (GET_MODE_UNIT_BITSIZE (mode)
- 1));
else
break;
@ -3661,7 +3661,8 @@ fold_rtx (rtx x, rtx_insn *insn)
{
if (SHIFT_COUNT_TRUNCATED)
inner_const = GEN_INT (INTVAL (inner_const)
& (GET_MODE_BITSIZE (mode) - 1));
& (GET_MODE_UNIT_BITSIZE (mode)
- 1));
else
break;
}
@ -3691,7 +3692,7 @@ fold_rtx (rtx x, rtx_insn *insn)
/* As an exception, we can turn an ASHIFTRT of this
form into a shift of the number of bits - 1. */
if (code == ASHIFTRT)
new_const = GEN_INT (GET_MODE_BITSIZE (mode) - 1);
new_const = GEN_INT (GET_MODE_UNIT_BITSIZE (mode) - 1);
else if (!side_effects_p (XEXP (y, 0)))
return CONST0_RTX (mode);
else

4
gcc/fwprop.c
View File

@ -357,8 +357,8 @@ canonicalize_address (rtx x)
{
case ASHIFT:
if (CONST_INT_P (XEXP (x, 1))
&& INTVAL (XEXP (x, 1)) < GET_MODE_BITSIZE (GET_MODE (x))
&& INTVAL (XEXP (x, 1)) >= 0)
&& INTVAL (XEXP (x, 1)) < GET_MODE_UNIT_BITSIZE (GET_MODE (x))
&& INTVAL (XEXP (x, 1)) >= 0)
{
HOST_WIDE_INT shift = INTVAL (XEXP (x, 1));
PUT_CODE (x, MULT);

2
gcc/targhooks.c
View File

@ -245,7 +245,7 @@ default_unwind_word_mode (void)
unsigned HOST_WIDE_INT
default_shift_truncation_mask (machine_mode mode)
{
return SHIFT_COUNT_TRUNCATED ? GET_MODE_BITSIZE (mode) - 1 : 0;
return SHIFT_COUNT_TRUNCATED ? GET_MODE_UNIT_BITSIZE (mode) - 1 : 0;
}
/* The default implementation of TARGET_MIN_DIVISIONS_FOR_RECIP_MUL. */