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recog.c (offsettable_address_p): Handle LO_SUM case.

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* recog.c (offsettable_address_p): Handle LO_SUM case.
	* config/mips/mips.c (double_memory_operand): Use adjust_address_nv
	instead of plus_constant.

From-SVN: r43912
This commit is contained in:
Richard Kenner 2001-07-10 22:09:10 +00:00 committed by Richard Kenner
parent 9166771183
commit 07217645f7
3 changed files with 17 additions and 11 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Tue Jul 10 07:27:53 2001 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
* recog.c (offsettable_address_p): Handle LO_SUM case.
* config/mips/mips.c (double_memory_operand): Use adjust_address_nv
instead of plus_constant.
2001-07-10 Stephane Carrez <Stephane.Carrez@worldnet.fr>
* reload1.c (merge_assigned_reloads): After a RELOAD_OTHER merge,

12
gcc/config/mips/mips.c
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@ -838,8 +838,6 @@ double_memory_operand (op, mode)
rtx op;
enum machine_mode mode;
{
rtx addr;
if (GET_CODE (op) != MEM
|| ! memory_operand (op, mode))
{
@ -939,14 +937,12 @@ double_memory_operand (op, mode)
/* Make sure that 4 added to the address is a valid memory address.
This essentially just checks for overflow in an added constant. */
addr = XEXP (op, 0);
if (CONSTANT_ADDRESS_P (addr))
if (CONSTANT_ADDRESS_P (XEXP (op, 0)))
return 1;
return memory_address_p ((GET_MODE_CLASS (mode) == MODE_INT
? SImode : SFmode),
plus_constant (addr, 4));
op = adjust_address_nv (op, GET_MODE_CLASS (mode) == MODE_INT
? SImode : SFmode, 4);
return memory_address_p (XEXP (op, 0));
}
/* Return nonzero if the code of this rtx pattern is EQ or NE. */

10
gcc/recog.c
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@ -1963,9 +1963,13 @@ offsettable_address_p (strictp, mode, y)
/* The offset added here is chosen as the maximum offset that
any instruction could need to add when operating on something
of the specified mode. We assume that if Y and Y+c are
valid addresses then so is Y+d for all 0<d<c. */
z = plus_constant (y, mode_sz - 1);
valid addresses then so is Y+d for all 0<d<c. adjust_address will
go inside a LO_SUM here, so we do so as well. */
if (GET_CODE (y) == LO_SUM)
z = gen_rtx_LO_SUM (GET_MODE (y), XEXP (y, 0),
plus_constant (XEXP (y, 1), mode_sz - 1));
else
z = plus_constant (y, mode_sz - 1);
/* Use QImode because an odd displacement may be automatically invalid
for any wider mode. But it should be valid for a single byte. */