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defaults.h (TARGET_MEM_CONSTRAINT): New target macro added.

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2008-05-27  Andreas Krebbel  <krebbel1@de.ibm.com>

	* defaults.h (TARGET_MEM_CONSTRAINT): New target macro added.
	* postreload.c (reload_cse_simplify_operands): Replace 'm'
	constraint with TARGET_MEM_CONSTRAINT.
	* recog.c (asm_operand_ok, preprocess_constraints,
	constrain_operands): Likewise.
	* regclass.c (record_reg_classes): Likewise.
	* reload.c (find_reloads, alternative_allows_const_pool_ref):
	Likewise.
	* reload1.c (maybe_fix_stack_asms): Likewise.
	* stmt.c (parse_output_constraint, parse_input_constraint):
	Likewise.
	* recog.h: Adjust comment.
	* genpreds.c (generic_constraint_letters): Remove 'm' constraint.
	* genoutput.c (note_constraint): Don't emit error for 'm'
	constraint.
	* doc/md.texi: Add a note to description of 'm' constraint.
	* doc/tm.texi: Document the new TARGET_MEM_CONSTRAINT macro.

From-SVN: r136011
This commit is contained in:
Andreas Krebbel 2008-05-27 11:41:10 +00:00 committed by Andreas Krebbel
parent 79d2a7279f
commit a4edaf8359
13 changed files with 64 additions and 20 deletions
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20
gcc/ChangeLog
View File

@ -1,3 +1,23 @@
2008-05-27 Andreas Krebbel <krebbel1@de.ibm.com>
* defaults.h (TARGET_MEM_CONSTRAINT): New target macro added.
* postreload.c (reload_cse_simplify_operands): Replace 'm'
constraint with TARGET_MEM_CONSTRAINT.
* recog.c (asm_operand_ok, preprocess_constraints,
constrain_operands): Likewise.
* regclass.c (record_reg_classes): Likewise.
* reload.c (find_reloads, alternative_allows_const_pool_ref):
Likewise.
* reload1.c (maybe_fix_stack_asms): Likewise.
* stmt.c (parse_output_constraint, parse_input_constraint):
Likewise.
* recog.h: Adjust comment.
* genpreds.c (generic_constraint_letters): Remove 'm' constraint.
* genoutput.c (note_constraint): Don't emit error for 'm'
constraint.
* doc/md.texi: Add a note to description of 'm' constraint.
* doc/tm.texi: Document the new TARGET_MEM_CONSTRAINT macro.
2008-05-27 Eric Botcazou <ebotcazou@adacore.com>
* tree-sra.c (sra_type_can_be_decomposed_p) <RECORD_TYPE>: Make sure

4
gcc/defaults.h
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@ -902,6 +902,10 @@ along with GCC; see the file COPYING3. If not see
#define LEGITIMATE_PIC_OPERAND_P(X) 1
#endif
#ifndef TARGET_MEM_CONSTRAINT
#define TARGET_MEM_CONSTRAINT 'm'
#endif
#ifndef REVERSIBLE_CC_MODE
#define REVERSIBLE_CC_MODE(MODE) 0
#endif

2
gcc/doc/md.texi
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@ -1085,6 +1085,8 @@ number of constraints and modifiers.
@item @samp{m}
A memory operand is allowed, with any kind of address that the machine
supports in general.
Note that the letter used for the general memory constraint can be
re-defined by a back end using the @code{TARGET_MEM_CONSTRAINT} macro.
@cindex offsettable address
@cindex @samp{o} in constraint

11
gcc/doc/tm.texi
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@ -5315,6 +5315,17 @@ into the @code{symbol_ref}, and then check for it here. When you see a
Format}.
@end defmac
@defmac TARGET_MEM_CONSTRAINT
A single character to be used instead of the default @code{'m'}
character for general memory addresses. This defines the constraint
letter which matches the memory addresses accepted by
@code{GO_IF_LEGITIMATE_ADDRESS_P}. Define this macro if you want to
support new address formats in your back end without changing the
semantics of the @code{'m'} constraint. This is necessary in order to
preserve functionality of inline assembly constructs using the
@code{'m'} constraint.
@end defmac
@defmac FIND_BASE_TERM (@var{x})
A C expression to determine the base term of address @var{x}.
This macro is used in only one place: `find_base_term' in alias.c.

5
gcc/genoutput.c
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@ -1122,7 +1122,10 @@ note_constraint (rtx exp, int lineno)
unsigned int namelen = strlen (name);
struct constraint_data **iter, **slot, *new;
if (strchr (indep_constraints, name[0]))
/* The 'm' constraint is special here since that constraint letter
can be overridden by the back end by defining the
TARGET_MEM_CONSTRAINT macro. */
if (strchr (indep_constraints, name[0]) && name[0] != 'm')
{
if (name[1] == '\0')
message_with_line (lineno, "constraint letter '%s' cannot be "

7
gcc/genpreds.c
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@ -690,8 +690,11 @@ static struct constraint_data **last_constraint_ptr = &first_constraint;
for (iter_ = first_constraint; iter_; iter_ = iter_->next_textual)
/* These letters, and all names beginning with them, are reserved for
generic constraints. */
static const char generic_constraint_letters[] = "EFVXgimnoprs";
generic constraints.
The 'm' constraint is not mentioned here since that constraint
letter can be overridden by the back end by defining the
TARGET_MEM_CONSTRAINT macro. */
static const char generic_constraint_letters[] = "EFVXginoprs";
/* Machine-independent code expects that constraints with these
(initial) letters will allow only (a subset of all) CONST_INTs. */

4
gcc/postreload.c
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@ -542,12 +542,12 @@ reload_cse_simplify_operands (rtx insn, rtx testreg)
case '*': case '%':
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
case 'm': case '<': case '>': case 'V': case 'o':
case '<': case '>': case 'V': case 'o':
case 'E': case 'F': case 'G': case 'H':
case 's': case 'i': case 'n':
case 'I': case 'J': case 'K': case 'L':
case 'M': case 'N': case 'O': case 'P':
case 'p': case 'X':
case 'p': case 'X': case TARGET_MEM_CONSTRAINT:
/* These don't say anything we care about. */
break;

6
gcc/recog.c
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@ -1543,7 +1543,7 @@ asm_operand_ok (rtx op, const char *constraint)
result = 1;
break;
case 'm':
case TARGET_MEM_CONSTRAINT:
case 'V': /* non-offsettable */
if (memory_operand (op, VOIDmode))
result = 1;
@ -2082,7 +2082,7 @@ preprocess_constraints (void)
}
continue;
case 'm':
case TARGET_MEM_CONSTRAINT:
op_alt[j].memory_ok = 1;
break;
case '<':
@ -2355,7 +2355,7 @@ constrain_operands (int strict)
win = 1;
break;
case 'm':
case TARGET_MEM_CONSTRAINT:
/* Memory operands must be valid, to the extent
required by STRICT. */
if (MEM_P (op))

3
gcc/recog.h
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@ -50,7 +50,8 @@ struct operand_alternative
/* Nonzero if '&' was found in the constraint string. */
unsigned int earlyclobber:1;
/* Nonzero if 'm' was found in the constraint string. */
/* Nonzero if TARGET_MEM_CONSTRAINT was found in the constraint
string. */
unsigned int memory_ok:1;
/* Nonzero if 'o' was found in the constraint string. */
unsigned int offmem_ok:1;

2
gcc/regclass.c
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@ -1701,7 +1701,7 @@ record_reg_classes (int n_alts, int n_ops, rtx *ops,
[(int) base_reg_class (VOIDmode, ADDRESS, SCRATCH)];
break;
case 'm': case 'o': case 'V':
case TARGET_MEM_CONSTRAINT: case 'o': case 'V':
/* It doesn't seem worth distinguishing between offsettable
and non-offsettable addresses here. */
allows_mem[i] = 1;

6
gcc/reload.c
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@ -3182,7 +3182,7 @@ find_reloads (rtx insn, int replace, int ind_levels, int live_known,
badop = 0;
break;
case 'm':
case TARGET_MEM_CONSTRAINT:
if (force_reload)
break;
if (MEM_P (operand)
@ -4522,7 +4522,7 @@ alternative_allows_const_pool_ref (rtx mem, const char *constraint, int altnum)
while (*constraint++ != ',');
altnum--;
}
/* Scan the requested alternative for 'm' or 'o'.
/* Scan the requested alternative for TARGET_MEM_CONSTRAINT or 'o'.
If one of them is present, this alternative accepts the result of
passing a constant-pool reference through find_reloads_toplev.
@ -4533,7 +4533,7 @@ alternative_allows_const_pool_ref (rtx mem, const char *constraint, int altnum)
for (; (c = *constraint) && c != ',' && c != '#';
constraint += CONSTRAINT_LEN (c, constraint))
{
if (c == 'm' || c == 'o')
if (c == TARGET_MEM_CONSTRAINT || c == 'o')
return true;
#ifdef EXTRA_CONSTRAINT_STR
if (EXTRA_MEMORY_CONSTRAINT (c, constraint)

10
gcc/reload1.c
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@ -1454,11 +1454,11 @@ maybe_fix_stack_asms (void)
switch (c)
{
case '=': case '+': case '*': case '%': case '?': case '!':
case '0': case '1': case '2': case '3': case '4': case 'm':
case '<': case '>': case 'V': case 'o': case '&': case 'E':
case 'F': case 's': case 'i': case 'n': case 'X': case 'I':
case 'J': case 'K': case 'L': case 'M': case 'N': case 'O':
case 'P':
case '0': case '1': case '2': case '3': case '4': case '<':
case '>': case 'V': case 'o': case '&': case 'E': case 'F':
case 's': case 'i': case 'n': case 'X': case 'I': case 'J':
case 'K': case 'L': case 'M': case 'N': case 'O': case 'P':
case TARGET_MEM_CONSTRAINT:
break;
case 'p':

4
gcc/stmt.c
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@ -363,7 +363,7 @@ parse_output_constraint (const char **constraint_p, int operand_num,
}
break;
case 'V': case 'm': case 'o':
case 'V': case TARGET_MEM_CONSTRAINT: case 'o':
*allows_mem = true;
break;
@ -462,7 +462,7 @@ parse_input_constraint (const char **constraint_p, int input_num,
}
break;
case 'V': case 'm': case 'o':
case 'V': case TARGET_MEM_CONSTRAINT: case 'o':
*allows_mem = true;
break;