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alpha.c (decl_in_text_section): New.

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* config/alpha/alpha.c (decl_in_text_section): New.
        (current_file_function_operand): Use it.
        (alpha_encode_section_info, alpha_end_function): Likewise.

From-SVN: r46910
This commit is contained in:
Richard Henderson 2001-11-09 17:16:13 -08:00 committed by Richard Henderson
parent 243a707078
commit 62918bd31b
2 changed files with 53 additions and 9 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2001-11-09 Richard Henderson <rth@redhat.com>
* config/alpha/alpha.c (decl_in_text_section): New.
(current_file_function_operand): Use it.
(alpha_encode_section_info, alpha_end_function): Likewise.
2001-11-07 David O'Brien <obrien@FreeBSD.org>
* config.gcc: Add FreeBSD/IA-64 target. Expand config/i64/elf.h headers.

56
gcc/config/alpha/alpha.c
View File

@ -114,6 +114,8 @@ int alpha_this_literal_sequence_number;
int alpha_this_gpdisp_sequence_number;
/* Declarations of static functions. */
static bool decl_in_text_section
PARAMS ((tree));
static bool local_symbol_p
PARAMS ((rtx));
static void alpha_set_memflags_1
@ -832,7 +834,7 @@ input_operand (op, mode)
}
/* Return 1 if OP is a SYMBOL_REF for a function known to be in this
file. */
file, and in the same section as the current function. */
int
current_file_function_operand (op, mode)
@ -842,11 +844,18 @@ current_file_function_operand (op, mode)
if (GET_CODE (op) != SYMBOL_REF)
return 0;
if (! SYMBOL_REF_FLAG (op)
&& op != XEXP (DECL_RTL (current_function_decl), 0))
return 0;
/* Easy test for recursion. */
if (op == XEXP (DECL_RTL (current_function_decl), 0))
return 1;
return 1;
/* Otherwise, we need the DECL for the SYMBOL_REF, which we can't get.
So SYMBOL_REF_FLAG has been declared to imply that the function is
in the default text section. So we must also check that the current
function is also in the text section. */
if (SYMBOL_REF_FLAG (op) && decl_in_text_section (current_function_decl))
return 1;
return 0;
}
/* Return 1 if OP is a SYMBOL_REF for which we can make a call via bsr. */
@ -1392,6 +1401,22 @@ alpha_tablejump_best_label (insn)
return best_label ? best_label : const0_rtx;
}
/* Return true if the function DECL will be placed in the default text
section. */
/* ??? Ideally we'd be able to always move from a SYMBOL_REF back to the
decl, as that would allow us to determine if two functions are in the
same section, which is what we really want to know. */
static bool
decl_in_text_section (decl)
tree decl;
{
return (DECL_SECTION_NAME (decl) == NULL_TREE
&& ! (flag_function_sections
|| (targetm.have_named_sections
&& DECL_ONE_ONLY (decl))));
}
/* If we are referencing a function that is static, make the SYMBOL_REF
special. We use this to see indicate we can branch to this function
without setting PV or restoring GP.
@ -1409,8 +1434,16 @@ alpha_encode_section_info (decl)
if (TREE_CODE (decl) == FUNCTION_DECL)
{
if (! TREE_PUBLIC (decl))
SYMBOL_REF_FLAG (XEXP (DECL_RTL (decl), 0)) = 1;
/* We mark public functions once they are emitted; otherwise we
don't know that they exist in this unit of translation. */
if (TREE_PUBLIC (decl))
return;
/* Do not mark functions that are not in .text; otherwise we
don't know that they are near enough for a direct branch. */
if (! decl_in_text_section (decl))
return;
SYMBOL_REF_FLAG (XEXP (DECL_RTL (decl), 0)) = 1;
return;
}
@ -6673,10 +6706,15 @@ alpha_end_function (file, fnname, decl)
Don't do this for global functions in object files destined for a
shared library because the function may be overridden by the application
or other libraries. Similarly, don't do this for weak functions. */
or other libraries. Similarly, don't do this for weak functions.
Don't do this for functions not defined in the .text section, as
otherwise it's not unlikely that the destination is out of range
for a direct branch. */
if (!DECL_WEAK (current_function_decl)
&& (!flag_pic || !TREE_PUBLIC (current_function_decl)))
&& (!flag_pic || !TREE_PUBLIC (current_function_decl))
&& decl_in_text_section (current_function_decl))
SYMBOL_REF_FLAG (XEXP (DECL_RTL (current_function_decl), 0)) = 1;
/* Output jump tables and the static subroutine information block. */