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output.h (compute_reloc_for_constant): Declare. 

* output.h (compute_reloc_for_constant): Declare.
* varasm.c (compute_reloc_for_constant): Extract from...
(output_addressed_constants): ... here.  Adjust all callers.

From-SVN: r72000
This commit is contained in:
Alexandre Oliva 2003-10-01 22:57:57 +00:00 committed by Alexandre Oliva
parent 2ce240d34e
commit b2218cc139
3 changed files with 87 additions and 26 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2003-10-01 Alexandre Oliva <aoliva@redhat.com>
* output.h (compute_reloc_for_constant): Declare.
* varasm.c (compute_reloc_for_constant): Extract from...
(output_addressed_constants): ... here. Adjust all callers.
2003-10-01 John David Anglin <dave.anglin@nrc-cnrc.gc.ca>
* aclocal.m4: Add hpux10* and hpux11.00 to /dev/zero blacklist.
@ -10,7 +16,7 @@
2003-09-30 Alexandre Oliva <aoliva@redhat.com>
config/frv/frv.h (PREDICATE_CODES): Added
* config/frv/frv.h (PREDICATE_CODES): Added
condexec_si_media_operator, condexec_sf_add_operator and
condexec_sf_conv_operator. Removed condexec_sf_binary_operator
and condexec_sf_unary_operator.

4
gcc/output.h
View File

@ -437,6 +437,10 @@ extern rtx this_is_asm_operands;
extern bool decl_readonly_section (tree, int);
extern bool decl_readonly_section_1 (tree, int, int);
/* This can be used to compute RELOC for the function above, when
given a constant expression. */
extern int compute_reloc_for_constant (tree);
/* User label prefix in effect for this compilation. */
extern const char *user_label_prefix;

101
gcc/varasm.c
View File

@ -154,7 +154,7 @@ static struct pool_constant *find_pool_constant (struct function *, rtx);
static void mark_constant_pool (void);
static void mark_constants (rtx);
static int mark_constant (rtx *current_rtx, void *data);
static int output_addressed_constants (tree);
static void output_addressed_constants (tree);
static unsigned HOST_WIDE_INT array_size_for_constructor (tree);
static unsigned min_align (unsigned, unsigned);
static void output_constructor (tree, unsigned HOST_WIDE_INT, unsigned int);
@ -1459,7 +1459,10 @@ assemble_variable (tree decl, int top_level ATTRIBUTE_UNUSED,
if (DECL_INITIAL (decl) == error_mark_node)
reloc = contains_pointers_p (TREE_TYPE (decl)) ? 3 : 0;
else if (DECL_INITIAL (decl))
reloc = output_addressed_constants (DECL_INITIAL (decl));
{
reloc = compute_reloc_for_constant (DECL_INITIAL (decl));
output_addressed_constants (DECL_INITIAL (decl));
}
resolve_unique_section (decl, reloc, flag_data_sections);
/* Handle uninitialized definitions. */
@ -2501,7 +2504,7 @@ output_constant_def_contents (rtx symbol)
/* Make sure any other constants whose addresses appear in EXP
are assigned label numbers. */
int reloc = output_addressed_constants (exp);
int reloc = compute_reloc_for_constant (exp);
/* Align the location counter as required by EXP's data type. */
int align = TYPE_ALIGN (TREE_TYPE (exp));
@ -2509,6 +2512,8 @@ output_constant_def_contents (rtx symbol)
align = CONSTANT_ALIGNMENT (exp, align);
#endif
output_addressed_constants (exp);
/* We are no longer deferring this constant. */
TREE_ASM_WRITTEN (exp) = 1;
@ -3329,14 +3334,76 @@ mark_constant (rtx *current_rtx, void *data ATTRIBUTE_UNUSED)
return 0;
}
/* Determine what kind of relocations EXP may need. */
int
compute_reloc_for_constant (tree exp)
{
int reloc = 0, reloc2;
tree tem;
/* Give the front-end a chance to convert VALUE to something that
looks more like a constant to the back-end. */
exp = (*lang_hooks.expand_constant) (exp);
switch (TREE_CODE (exp))
{
case ADDR_EXPR:
case FDESC_EXPR:
/* Go inside any operations that get_inner_reference can handle and see
if what's inside is a constant: no need to do anything here for
addresses of variables or functions. */
for (tem = TREE_OPERAND (exp, 0); handled_component_p (tem);
tem = TREE_OPERAND (tem, 0))
;
if (TREE_PUBLIC (tem))
reloc |= 2;
else
reloc |= 1;
break;
case PLUS_EXPR:
reloc = compute_reloc_for_constant (TREE_OPERAND (exp, 0));
reloc |= compute_reloc_for_constant (TREE_OPERAND (exp, 1));
break;
case MINUS_EXPR:
reloc = compute_reloc_for_constant (TREE_OPERAND (exp, 0));
reloc2 = compute_reloc_for_constant (TREE_OPERAND (exp, 1));
/* The difference of two local labels is computable at link time. */
if (reloc == 1 && reloc2 == 1)
reloc = 0;
else
reloc |= reloc2;
break;
case NOP_EXPR:
case CONVERT_EXPR:
case NON_LVALUE_EXPR:
reloc = compute_reloc_for_constant (TREE_OPERAND (exp, 0));
break;
case CONSTRUCTOR:
for (tem = CONSTRUCTOR_ELTS (exp); tem; tem = TREE_CHAIN (tem))
if (TREE_VALUE (tem) != 0)
reloc |= compute_reloc_for_constant (TREE_VALUE (tem));
break;
default:
break;
}
return reloc;
}
/* Find all the constants whose addresses are referenced inside of EXP,
and make sure assembler code with a label has been output for each one.
Indicate whether an ADDR_EXPR has been encountered. */
static int
static void
output_addressed_constants (tree exp)
{
int reloc = 0, reloc2;
tree tem;
/* Give the front-end a chance to convert VALUE to something that
@ -3357,45 +3424,29 @@ output_addressed_constants (tree exp)
if (TREE_CODE_CLASS (TREE_CODE (tem)) == 'c'
|| TREE_CODE (tem) == CONSTRUCTOR)
output_constant_def (tem, 0);
if (TREE_PUBLIC (tem))
reloc |= 2;
else
reloc |= 1;
break;
case PLUS_EXPR:
reloc = output_addressed_constants (TREE_OPERAND (exp, 0));
reloc |= output_addressed_constants (TREE_OPERAND (exp, 1));
break;
case MINUS_EXPR:
reloc = output_addressed_constants (TREE_OPERAND (exp, 0));
reloc2 = output_addressed_constants (TREE_OPERAND (exp, 1));
/* The difference of two local labels is computable at link time. */
if (reloc == 1 && reloc2 == 1)
reloc = 0;
else
reloc |= reloc2;
break;
output_addressed_constants (TREE_OPERAND (exp, 1));
/* Fall through. */
case NOP_EXPR:
case CONVERT_EXPR:
case NON_LVALUE_EXPR:
reloc = output_addressed_constants (TREE_OPERAND (exp, 0));
output_addressed_constants (TREE_OPERAND (exp, 0));
break;
case CONSTRUCTOR:
for (tem = CONSTRUCTOR_ELTS (exp); tem; tem = TREE_CHAIN (tem))
if (TREE_VALUE (tem) != 0)
reloc |= output_addressed_constants (TREE_VALUE (tem));
output_addressed_constants (TREE_VALUE (tem));
break;
default:
break;
}
return reloc;
}
/* Return nonzero if VALUE is a valid constant-valued expression