OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

bfin.c (bfin_expand_call): Inline PLT with l1_text attribute when appropriate.

Browse Source 
* config/bfin/bfin.c (bfin_expand_call): Inline PLT with l1_text
	attribute when appropriate.
	(bfin_handle_l1_text_attribute): New.
	(bfin_handle_l1_data_attribute): New.
	(bfin_attribute_table): Add attributes: l1_text, l1_data,
	l1_data_A and l1_data_B.
	* doc/extend.texi (node Function Attributes): Document l1_text
	function attribute.
	(Variable Attributes): Add Blackfin subsection. Document l1_data,
	l1_data_A and l1_data_B variable attributes.

From-SVN: r127887
This commit is contained in:
Jie Zhang 2007-08-29 09:15:14 +00:00 committed by Jie Zhang
parent e874e49fdf
commit 4af797b502
3 changed files with 147 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
gcc/ChangeLog
View File

@ -1,3 +1,16 @@
2007-08-29 Jie Zhang <jie.zhang@analog.com>
* config/bfin/bfin.c (bfin_expand_call): Inline PLT with l1_text
attribute when appropriate.
(bfin_handle_l1_text_attribute): New.
(bfin_handle_l1_data_attribute): New.
(bfin_attribute_table): Add attributes: l1_text, l1_data,
l1_data_A and l1_data_B.
* doc/extend.texi (node Function Attributes): Document l1_text
function attribute.
(Variable Attributes): Add Blackfin subsection. Document l1_data,
l1_data_A and l1_data_B variable attributes.
2007-08-28 Jie Zhang <jie.zhang@analog.com>
* config/bfin/bfin.opt (minline-plt): Add.

110
gcc/config/bfin/bfin.c
View File

@ -1879,11 +1879,30 @@ bfin_expand_call (rtx retval, rtx fnaddr, rtx callarg1, rtx cookie, int sibcall)
if (TARGET_FDPIC)
{
int caller_has_l1_text, callee_has_l1_text;
caller_has_l1_text = callee_has_l1_text = 0;
if (lookup_attribute ("l1_text",
DECL_ATTRIBUTES (cfun->decl)) != NULL_TREE)
caller_has_l1_text = 1;
if (GET_CODE (callee) == SYMBOL_REF
&& SYMBOL_REF_DECL (callee) && DECL_P (SYMBOL_REF_DECL (callee))
&& lookup_attribute
("l1_text",
DECL_ATTRIBUTES (SYMBOL_REF_DECL (callee))) != NULL_TREE)
callee_has_l1_text = 1;
if (GET_CODE (callee) != SYMBOL_REF
|| bfin_longcall_p (callee, INTVAL (cookie))
|| (GET_CODE (callee) == SYMBOL_REF
&& !SYMBOL_REF_LOCAL_P (callee)
&& TARGET_INLINE_PLT))
&& TARGET_INLINE_PLT)
|| caller_has_l1_text != callee_has_l1_text
|| (caller_has_l1_text && callee_has_l1_text
&& (GET_CODE (callee) != SYMBOL_REF
|| !SYMBOL_REF_LOCAL_P (callee))))
{
rtx addr = callee;
if (! address_operand (addr, Pmode))
@ -4646,6 +4665,91 @@ bfin_handle_longcall_attribute (tree *node, tree name,
return NULL_TREE;
}
/* Handle a "l1_text" attribute; arguments as in
struct attribute_spec.handler. */
static tree
bfin_handle_l1_text_attribute (tree *node, tree name, tree ARG_UNUSED (args),
int ARG_UNUSED (flags), bool *no_add_attrs)
{
tree decl = *node;
if (TREE_CODE (decl) != FUNCTION_DECL)
{
error ("`%s' attribute only applies to functions",
IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
/* The decl may have already been given a section attribute
from a previous declaration. Ensure they match. */
else if (DECL_SECTION_NAME (decl) != NULL_TREE
&& strcmp (TREE_STRING_POINTER (DECL_SECTION_NAME (decl)),
".l1.text") != 0)
{
error ("section of %q+D conflicts with previous declaration",
decl);
*no_add_attrs = true;
}
else
DECL_SECTION_NAME (decl) = build_string (9, ".l1.text");
return NULL_TREE;
}
/* Handle a "l1_data", "l1_data_A" or "l1_data_B" attribute;
arguments as in struct attribute_spec.handler. */
static tree
bfin_handle_l1_data_attribute (tree *node, tree name, tree ARG_UNUSED (args),
int ARG_UNUSED (flags), bool *no_add_attrs)
{
tree decl = *node;
if (TREE_CODE (decl) != VAR_DECL)
{
error ("`%s' attribute only applies to variables",
IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
else if (current_function_decl != NULL_TREE
&& !TREE_STATIC (decl))
{
error ("`%s' attribute cannot be specified for local variables",
IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
else
{
const char *section_name;
if (strcmp (IDENTIFIER_POINTER (name), "l1_data") == 0)
section_name = ".l1.data";
else if (strcmp (IDENTIFIER_POINTER (name), "l1_data_A") == 0)
section_name = ".l1.data.A";
else if (strcmp (IDENTIFIER_POINTER (name), "l1_data_B") == 0)
section_name = ".l1.data.B";
else
gcc_unreachable ();
/* The decl may have already been given a section attribute
from a previous declaration. Ensure they match. */
if (DECL_SECTION_NAME (decl) != NULL_TREE
&& strcmp (TREE_STRING_POINTER (DECL_SECTION_NAME (decl)),
section_name) != 0)
{
error ("section of %q+D conflicts with previous declaration",
decl);
*no_add_attrs = true;
}
else
DECL_SECTION_NAME (decl)
= build_string (strlen (section_name) + 1, section_name);
}
return NULL_TREE;
}
/* Table of valid machine attributes. */
const struct attribute_spec bfin_attribute_table[] =
{
@ -4658,6 +4762,10 @@ const struct attribute_spec bfin_attribute_table[] =
{ "saveall", 0, 0, false, true, true, NULL },
{ "longcall", 0, 0, false, true, true, bfin_handle_longcall_attribute },
{ "shortcall", 0, 0, false, true, true, bfin_handle_longcall_attribute },
{ "l1_text", 0, 0, true, false, false, bfin_handle_l1_text_attribute },
{ "l1_data", 0, 0, true, false, false, bfin_handle_l1_data_attribute },
{ "l1_data_A", 0, 0, true, false, false, bfin_handle_l1_data_attribute },
{ "l1_data_B", 0, 0, true, false, false, bfin_handle_l1_data_attribute },
{ NULL, 0, 0, false, false, false, NULL }
};

25
gcc/doc/extend.texi
View File

@ -2148,6 +2148,13 @@ When used together with @code{interrupt_handler}, @code{exception_handler}
or @code{nmi_handler}, code will be generated to load the stack pointer
from the USP register in the function prologue.
@item l1_text
@cindex @code{l1_text} function attribute
This attribute specifies a function to be placed into L1 Instruction
SRAM. The function will be put into a specific section named @code{.l1.text}.
With @option{-mfdpic}, function calls with a such function as the callee
or caller will use inlined PLT.
@item long_call/short_call
@cindex indirect calls on ARM
This attribute specifies how a particular function is called on
@ -3465,6 +3472,24 @@ The @code{dllexport} attribute is described in @xref{Function Attributes}.
@end table
@subsection Blackfin Variable Attributes
Three attributes are currently defined for the Blackfin.
@table @code
@item l1_data
@item l1_data_A
@item l1_data_B
@cindex @code{l1_data} variable attribute
@cindex @code{l1_data_A} variable attribute
@cindex @code{l1_data_B} variable attribute
Use these attributes on the Blackfin to place the variable into L1 Data SRAM.
Variables with @code{l1_data} attribute will be put into the specific section
named @code{.l1.data}. Those with @code{l1_data_A} attribute will be put into
the specific section named @code{.l1.data.A}. Those with @code{l1_data_B}
attribute will be put into the specific section named @code{.l1.data.B}.
@end table
@subsection M32R/D Variable Attributes
One attribute is currently defined for the M32R/D@.