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mips.c (symbolic_expression_p): New function. 

* config/mips/mips.c (symbolic_expression_p): New function.
	(mips_select_rtx_section): Put symbolic expressions in the
	data section, not the read-only data section.

From-SVN: r27688
This commit is contained in:
Mark Mitchell 1999-06-21 22:47:29 +00:00 committed by Mark Mitchell
parent c3bef29f48
commit d660677de9
2 changed files with 38 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Mon Jun 21 12:47:39 1999 Mark Mitchell <mark@codesourcery.com>
* config/mips/mips.c (symbolic_expression_p): New function.
(mips_select_rtx_section): Put symbolic expressions in the
data section, not the read-only data section.
Mon Jun 21 22:13:06 1999 Jeffrey A Law (law@cygnus.com)
* rs6000.md (find_addr_reg): Handle LO_SUM addresses.

33
gcc/config/mips/mips.c
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@ -108,7 +108,7 @@ static void dump_constants PROTO ((struct constant *,
static rtx mips_find_symbol PROTO ((rtx));
static void abort_with_insn PROTO ((rtx, const char *))
ATTRIBUTE_NORETURN;
static int symbolic_expression_p PROTO ((rtx));
/* Global variables for machine-dependent things. */
@ -6894,6 +6894,29 @@ mips_can_use_return_insn ()
return compute_frame_size (get_frame_size ()) == 0;
}
/* Returns non-zero if X contains a SYMBOL_REF. */
static int
symbolic_expression_p (x)
rtx x;
{
if (GET_CODE (x) == SYMBOL_REF)
return 1;
if (GET_CODE (x) == CONST)
return symbolic_expression_p (XEXP (x, 0));
if (GET_RTX_CLASS (GET_CODE (x)) == '1')
return symbolic_expression_p (XEXP (x, 0));
if (GET_RTX_CLASS (GET_CODE (x)) == 'c'
|| GET_RTX_CLASS (GET_CODE (x)) == '2')
return (symbolic_expression_p (XEXP (x, 0))
|| symbolic_expression_p (XEXP (x, 1)));
return 0;
}
/* Choose the section to use for the constant rtx expression X that has
mode MODE. */
@ -6923,6 +6946,14 @@ mips_select_rtx_section (mode, x)
if (GET_MODE_SIZE (mode) <= mips_section_threshold
&& mips_section_threshold > 0)
SMALL_DATA_SECTION ();
else if (flag_pic && symbolic_expression_p (x))
/* Any expression involving a SYMBOL_REF might need a run-time
relocation. (The symbol might be defined in a shared
library loaded at an unexpected base address.) So, we must
put such expressions in the data segment (which is
writable), rather than the text segment (which is
read-only). */
data_section ();
else
READONLY_DATA_SECTION ();
}