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rs6000-protos.h (rs6000_find_base_term): Declare.

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gcc/
	* config/rs6000/rs6000-protos.h (rs6000_find_base_term): Declare.
	* config/rs6000/rs6000.h (FIND_BASE_TERM): New macro.
	* config/rs6000/rs6000.c (rs6000_find_base_term): New function.

From-SVN: r140912
This commit is contained in:
Richard Sandiford 2008-10-06 19:08:04 +00:00 • committed by Richard Sandiford
parent 08a6a74b91
commit 944258ebc6
4 changed files with 30 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2008-10-06 Richard Sandiford <rdsandiford@googlemail.com>
* config/rs6000/rs6000-protos.h (rs6000_find_base_term): Declare.
* config/rs6000/rs6000.h (FIND_BASE_TERM): New macro.
* config/rs6000/rs6000.c (rs6000_find_base_term): New function.
2008-10-06 Richard Sandiford <rdsandiford@googlemail.com>
* config/darwin-protos.h (machopic_function_base_name): Delete.

1
gcc/config/rs6000/rs6000-protos.h
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@ -112,6 +112,7 @@ extern rtx rs6000_legitimize_reload_address (rtx, enum machine_mode,
extern int rs6000_legitimate_address (enum machine_mode, rtx, int);
extern bool rs6000_legitimate_offset_address_p (enum machine_mode, rtx, int);
extern bool rs6000_mode_dependent_address (rtx);
extern rtx rs6000_find_base_term (rtx);
extern bool rs6000_offsettable_memref_p (rtx);
extern rtx rs6000_return_addr (int, rtx);
extern void rs6000_output_symbol_ref (FILE*, rtx);

21
gcc/config/rs6000/rs6000.c
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@ -4455,6 +4455,27 @@ rs6000_mode_dependent_address (rtx addr)
return false;
}
/* Implement FIND_BASE_TERM. */
rtx
rs6000_find_base_term (rtx op)
{
rtx base, offset;
split_const (op, &base, &offset);
if (GET_CODE (base) == UNSPEC)
switch (XINT (base, 1))
{
case UNSPEC_TOCREL:
case UNSPEC_MACHOPIC_OFFSET:
/* OP represents SYM [+ OFFSET] - ANCHOR. SYM is the base term
for aliasing purposes. */
return XVECEXP (base, 0, 0);
}
return op;
}
/* More elaborate version of recog's offsettable_memref_p predicate
that works around the ??? note of rs6000_mode_dependent_address.
In particular it accepts

2
gcc/config/rs6000/rs6000.h
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@ -1856,6 +1856,8 @@ do { \
if (rs6000_mode_dependent_address (ADDR)) \
goto LABEL; \
} while (0)
#define FIND_BASE_TERM rs6000_find_base_term
/* The register number of the register used to address a table of
static data addresses in memory. In some cases this register is