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explow.c (convert_memory_address_addr_space): Rename to ...

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2014-10-14  Andrew Pinski  <apinski@cavium.com>

	* explow.c (convert_memory_address_addr_space): Rename to ...
	(convert_memory_address_addr_space_1): This.  Add in_const argument.
	Inside a CONST RTL, permute the conversion and addition of constant
	for zero and sign extended pointers.
	(convert_memory_address_addr_space): New function.

From-SVN: r216230
This commit is contained in:
Andrew Pinski 2014-10-15 00:39:16 +00:00 • committed by Andrew Pinski
parent ceeb2cbc4f
commit 7745730ff6
2 changed files with 36 additions and 12 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2014-10-14 Andrew Pinski <apinski@cavium.com>
* explow.c (convert_memory_address_addr_space): Rename to ...
(convert_memory_address_addr_space_1): This. Add in_const argument.
Inside a CONST RTL, permute the conversion and addition of constant
for zero and sign extended pointers.
(convert_memory_address_addr_space): New function.
2014-10-14 Andrew Pinski <apinski@cavium.com>
Revert:

40
gcc/explow.c
View file

@ -310,11 +310,13 @@ break_out_memory_refs (rtx x)
an address in the address space's address mode, or vice versa (TO_MODE says
which way). We take advantage of the fact that pointers are not allowed to
overflow by commuting arithmetic operations over conversions so that address
arithmetic insns can be used. */
arithmetic insns can be used. IN_CONST is true if this conversion is inside
a CONST. */
rtx
convert_memory_address_addr_space (enum machine_mode to_mode ATTRIBUTE_UNUSED,
rtx x, addr_space_t as ATTRIBUTE_UNUSED)
static rtx
convert_memory_address_addr_space_1 (enum machine_mode to_mode ATTRIBUTE_UNUSED,
rtx x, addr_space_t as ATTRIBUTE_UNUSED,
bool in_const)
{
#ifndef POINTERS_EXTEND_UNSIGNED
gcc_assert (GET_MODE (x) == to_mode || GET_MODE (x) == VOIDmode);
@ -370,8 +372,8 @@ convert_memory_address_addr_space (enum machine_mode to_mode ATTRIBUTE_UNUSED,
case CONST:
return gen_rtx_CONST (to_mode,
convert_memory_address_addr_space
(to_mode, XEXP (x, 0), as));
convert_memory_address_addr_space_1
(to_mode, XEXP (x, 0), as, true));
break;
case PLUS:
@ -381,16 +383,18 @@ convert_memory_address_addr_space (enum machine_mode to_mode ATTRIBUTE_UNUSED,
does not change it or if one operand is a constant and we are
using a ptr_extend instruction (POINTERS_EXTEND_UNSIGNED < 0).
We can always safely permute them if we are making the address
narrower. */
narrower. Inside a CONST RTL, this is safe for both pointers
zero or sign extended as pointers cannot wrap. */
if (GET_MODE_SIZE (to_mode) < GET_MODE_SIZE (from_mode)
|| (GET_CODE (x) == PLUS
&& CONST_INT_P (XEXP (x, 1))
&& (XEXP (x, 1) == convert_memory_address_addr_space
(to_mode, XEXP (x, 1), as)
|| POINTERS_EXTEND_UNSIGNED < 0)))
&& ((in_const && POINTERS_EXTEND_UNSIGNED != 0)
|| XEXP (x, 1) == convert_memory_address_addr_space_1
(to_mode, XEXP (x, 1), as, in_const)
|| POINTERS_EXTEND_UNSIGNED < 0)))
return gen_rtx_fmt_ee (GET_CODE (x), to_mode,
convert_memory_address_addr_space
(to_mode, XEXP (x, 0), as),
convert_memory_address_addr_space_1
(to_mode, XEXP (x, 0), as, in_const),
XEXP (x, 1));
break;
@ -402,6 +406,18 @@ convert_memory_address_addr_space (enum machine_mode to_mode ATTRIBUTE_UNUSED,
x, POINTERS_EXTEND_UNSIGNED);
#endif /* defined(POINTERS_EXTEND_UNSIGNED) */
}
/* Given X, a memory address in address space AS' pointer mode, convert it to
an address in the address space's address mode, or vice versa (TO_MODE says
which way). We take advantage of the fact that pointers are not allowed to
overflow by commuting arithmetic operations over conversions so that address
arithmetic insns can be used. */
rtx
convert_memory_address_addr_space (enum machine_mode to_mode, rtx x, addr_space_t as)
{
return convert_memory_address_addr_space_1 (to_mode, x, as, false);
}
/* Return something equivalent to X but valid as a memory address for something
of mode MODE in the named address space AS. When X is not itself valid,