The following patch is for building arm GCC with LRA. I found that
ASHIFTRT and LSHIFTRT are used in address calculation for arm, e.g.
(insn 78 76 79 8 (set (reg/v:SI 153 [ offset ])
(mem:SI (plus:SI (ashiftrt:SI (reg:SI 151 [ D.6620 ])
(const_int 8 [0x8]))
(reg/f:SI 183 [ MEM[(const void * const *)obj_ptr_5(D)]
])) [5 *_27+0 S4 A32]))
/home/cygnus/vmakarov/build1/trunk5/gcc/libstdc++-v3/libsupc++/tinfo.h:88 197
{*arm_movsi_insn}
(expr_list:REG_DEAD (reg/f:SI 183 [ MEM[(const void * const
*)obj_ptr_5(D)] ])
(expr_list:REG_DEAD (reg:SI 151 [ D.6620 ])
(nil))))
The patch was successfully bootstrapped on arm-hfp.
Richard, is it ok to commit to the trunk?
2013-06-27 Vladimir Makarov <vmaka...@redhat.com>
* rtlanal.c (must_be_index_p, set_address_index): Add ASHIFTRT and
LSHIFTRT.
Index: rtlanal.c
===================================================================
--- rtlanal.c (revision 200174)
+++ rtlanal.c (working copy)
@@ -5480,7 +5480,8 @@ must_be_base_p (rtx x)
static bool
must_be_index_p (rtx x)
{
- return GET_CODE (x) == MULT || GET_CODE (x) == ASHIFT;
+ return (GET_CODE (x) == MULT || GET_CODE (x) == ASHIFT
+ || GET_CODE (x) == ASHIFTRT || GET_CODE (x) == LSHIFTRT);
}
/* Set the segment part of address INFO to LOC, given that INNER is the
@@ -5519,7 +5520,8 @@ set_address_base (struct address_info *i
static void
set_address_index (struct address_info *info, rtx *loc, rtx *inner)
{
- if ((GET_CODE (*inner) == MULT || GET_CODE (*inner) == ASHIFT)
+ if ((GET_CODE (*inner) == MULT || GET_CODE (*inner) == ASHIFT
+ || GET_CODE (*inner) == ASHIFTRT || GET_CODE (*inner) == LSHIFTRT)
&& CONSTANT_P (XEXP (*inner, 1)))
inner = strip_address_mutations (&XEXP (*inner, 0));
gcc_checking_assert (REG_P (*inner)
