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varasm.c (output_constant): Let the target resolve conversions of addresses to non-default pointer sizes.

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* varasm.c (output_constant): Let the target resolve
conversions of addresses to non-default pointer sizes.

From-SVN: r103750
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DJ Delorie 2005-09-01 19:26:36 -04:00 committed by DJ Delorie
parent 4eafe88212
commit 056061d8da
2 changed files with 40 additions and 1 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2005-09-01 DJ Delorie <dj@redhat.com>
* varasm.c (output_constant): Let the target resolve
conversions of addresses to non-default pointer sizes.
2005-09-01 Nicolas Pitre <nico@cam.org>
* config/arm/arm.c (arm_legitimize_address): Split absolute addresses

36
gcc/varasm.c
View File

@ -3847,12 +3847,46 @@ output_constant (tree exp, unsigned HOST_WIDE_INT size, unsigned int align)
if (size == 0 || flag_syntax_only)
return;
/* See if we're trying to intialize a pointer in a non-default mode
to the address of some declaration somewhere. If the target says
the mode is valid for pointers, assume the target has a way of
resolving it. */
if (TREE_CODE (exp) == NOP_EXPR
&& POINTER_TYPE_P (TREE_TYPE (exp))
&& targetm.valid_pointer_mode (TYPE_MODE (TREE_TYPE (exp))))
{
tree saved_type = TREE_TYPE (exp);
/* Peel off any intermediate conversions-to-pointer for valid
pointer modes. */
while (TREE_CODE (exp) == NOP_EXPR
&& POINTER_TYPE_P (TREE_TYPE (exp))
&& targetm.valid_pointer_mode (TYPE_MODE (TREE_TYPE (exp))))
exp = TREE_OPERAND (exp, 0);
/* If what we're left with is the address of something, we can
convert the address to the final type and output it that
way. */
if (TREE_CODE (exp) == ADDR_EXPR)
exp = build1 (ADDR_EXPR, saved_type, TREE_OPERAND (exp, 0));
}
/* Eliminate any conversions since we'll be outputting the underlying
constant. */
while (TREE_CODE (exp) == NOP_EXPR || TREE_CODE (exp) == CONVERT_EXPR
|| TREE_CODE (exp) == NON_LVALUE_EXPR
|| TREE_CODE (exp) == VIEW_CONVERT_EXPR)
exp = TREE_OPERAND (exp, 0);
{
HOST_WIDE_INT type_size = int_size_in_bytes (TREE_TYPE (exp));
HOST_WIDE_INT op_size = int_size_in_bytes (TREE_TYPE (TREE_OPERAND (exp, 0)));
/* Make sure eliminating the conversion is really a no-op. */
if (type_size != op_size)
internal_error ("no-op convert from %wd to %wd bytes in initializer",
op_size, type_size);
exp = TREE_OPERAND (exp, 0);
}
code = TREE_CODE (TREE_TYPE (exp));
thissize = int_size_in_bytes (TREE_TYPE (exp));