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6d4716823e
gcc/gcc5-pr32219-revert.patch
Jakub Jelinek 6d4716823e 5.0.0-0.14
2015-02-16 10:55:27 +01:00

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Revert:
2015-02-12 H.J. Lu <hongjiu.lu@intel.com>
Richard Henderson <rth@redhat.com>
PR rtl/32219
* cgraphunit.c (cgraph_node::finalize_function): Set definition
before notice_global_symbol.
(varpool_node::finalize_decl): Likewise.
* varasm.c (default_binds_local_p_2): Rename from
default_binds_local_p_1, add weak_dominate argument. Use direct
returns instead of assigning to local variable. Unify varpool and
cgraph paths via symtab_node. Reject undef weak variables before
testing visibility. Reorder tests for simplicity.
(default_binds_local_p): Use default_binds_local_p_2.
(default_binds_local_p_1): Likewise.
(decl_binds_to_current_def_p): Unify varpool and cgraph paths
via symtab_node.
(default_elf_asm_output_external): Emit visibility when specified.
--- gcc/cgraphunit.c (revision 220674)
+++ gcc/cgraphunit.c (revision 220673)
@@ -442,10 +442,8 @@ cgraph_node::finalize_function (tree dec
node->local.redefined_extern_inline = true;
}
- /* Set definition first before calling notice_global_symbol so that
- it is available to notice_global_symbol. */
- node->definition = true;
notice_global_symbol (decl);
+ node->definition = true;
node->lowered = DECL_STRUCT_FUNCTION (decl)->cfg != NULL;
/* With -fkeep-inline-functions we are keeping all inline functions except
@@ -805,10 +803,8 @@ varpool_node::finalize_decl (tree decl)
if (node->definition)
return;
- /* Set definition first before calling notice_global_symbol so that
- it is available to notice_global_symbol. */
- node->definition = true;
notice_global_symbol (decl);
+ node->definition = true;
if (TREE_THIS_VOLATILE (decl) || DECL_PRESERVE_P (decl)
/* Traditionally we do not eliminate static variables when not
optimizing and when not doing toplevel reoder. */
--- gcc/varasm.c (revision 220674)
+++ gcc/varasm.c (revision 220673)
@@ -6802,96 +6802,97 @@ resolution_local_p (enum ld_plugin_symbo
|| resolution == LDPR_RESOLVED_EXEC);
}
-static bool
-default_binds_local_p_2 (const_tree exp, bool shlib, bool weak_dominate)
+/* Assume ELF-ish defaults, since that's pretty much the most liberal
+ wrt cross-module name binding. */
+
+bool
+default_binds_local_p (const_tree exp)
{
+ return default_binds_local_p_1 (exp, flag_shlib);
+}
+
+bool
+default_binds_local_p_1 (const_tree exp, int shlib)
+{
+ bool local_p;
+ bool resolved_locally = false;
+ bool resolved_to_local_def = false;
+
+ /* With resolution file in hands, take look into resolutions.
+ We can't just return true for resolved_locally symbols,
+ because dynamic linking might overwrite symbols
+ in shared libraries. */
+ if (TREE_CODE (exp) == VAR_DECL && TREE_PUBLIC (exp)
+ && (TREE_STATIC (exp) || DECL_EXTERNAL (exp)))
+ {
+ varpool_node *vnode = varpool_node::get (exp);
+ if (vnode && (resolution_local_p (vnode->resolution) || vnode->in_other_partition))
+ resolved_locally = true;
+ if (vnode
+ && resolution_to_local_definition_p (vnode->resolution))
+ resolved_to_local_def = true;
+ }
+ else if (TREE_CODE (exp) == FUNCTION_DECL && TREE_PUBLIC (exp))
+ {
+ struct cgraph_node *node = cgraph_node::get (exp);
+ if (node
+ && (resolution_local_p (node->resolution) || node->in_other_partition))
+ resolved_locally = true;
+ if (node
+ && resolution_to_local_definition_p (node->resolution))
+ resolved_to_local_def = true;
+ }
+
/* A non-decl is an entry in the constant pool. */
if (!DECL_P (exp))
- return true;
-
+ local_p = true;
/* Weakrefs may not bind locally, even though the weakref itself is always
static and therefore local. Similarly, the resolver for ifunc functions
might resolve to a non-local function.
FIXME: We can resolve the weakref case more curefuly by looking at the
weakref alias. */
- if (lookup_attribute ("weakref", DECL_ATTRIBUTES (exp))
+ else if (lookup_attribute ("weakref", DECL_ATTRIBUTES (exp))
|| (TREE_CODE (exp) == FUNCTION_DECL
&& lookup_attribute ("ifunc", DECL_ATTRIBUTES (exp))))
- return false;
-
+ local_p = false;
/* Static variables are always local. */
- if (! TREE_PUBLIC (exp))
- return true;
-
- /* With resolution file in hand, take look into resolutions.
- We can't just return true for resolved_locally symbols,
- because dynamic linking might overwrite symbols
- in shared libraries. */
- bool resolved_locally = false;
- bool defined_locally = false;
- if (symtab_node *node = symtab_node::get (exp))
- {
- if (node->definition || node->in_other_partition)
- {
- defined_locally = true;
- resolved_locally = (weak_dominate && !shlib);
- }
- if (resolution_to_local_definition_p (node->resolution))
- defined_locally = resolved_locally = true;
- else if (resolution_local_p (node->resolution))
- resolved_locally = true;
- }
-
- /* Undefined weak symbols are never defined locally. */
- if (DECL_WEAK (exp) && !defined_locally)
- return false;
-
- /* A symbol is local if the user has said explicitly that it will be,
- or if we have a definition for the symbol. We cannot infer visibility
- for undefined symbols. */
- if (DECL_VISIBILITY (exp) != VISIBILITY_DEFAULT
- && (DECL_VISIBILITY_SPECIFIED (exp) || defined_locally))
- return true;
-
+ else if (! TREE_PUBLIC (exp))
+ local_p = true;
+ /* A variable is local if the user has said explicitly that it will
+ be. */
+ else if ((DECL_VISIBILITY_SPECIFIED (exp)
+ || resolved_to_local_def)
+ && DECL_VISIBILITY (exp) != VISIBILITY_DEFAULT)
+ local_p = true;
+ /* Variables defined outside this object might not be local. */
+ else if (DECL_EXTERNAL (exp) && !resolved_locally)
+ local_p = false;
+ /* If defined in this object and visibility is not default, must be
+ local. */
+ else if (DECL_VISIBILITY (exp) != VISIBILITY_DEFAULT)
+ local_p = true;
+ /* Default visibility weak data can be overridden by a strong symbol
+ in another module and so are not local. */
+ else if (DECL_WEAK (exp)
+ && !resolved_locally)
+ local_p = false;
/* If PIC, then assume that any global name can be overridden by
symbols resolved from other modules. */
- if (shlib)
- return false;
-
- /* Variables defined outside this object might not be local. */
- if (DECL_EXTERNAL (exp) && !resolved_locally)
- return false;
-
- /* Non-dominant weak symbols are not defined locally. */
- if (DECL_WEAK (exp) && !resolved_locally)
- return false;
-
+ else if (shlib)
+ local_p = false;
/* Uninitialized COMMON variable may be unified with symbols
resolved from other modules. */
- if (DECL_COMMON (exp)
- && !resolved_locally
- && (DECL_INITIAL (exp) == NULL
- || (!in_lto_p && DECL_INITIAL (exp) == error_mark_node)))
- return false;
-
+ else if (DECL_COMMON (exp)
+ && !resolved_locally
+ && (DECL_INITIAL (exp) == NULL
+ || (!in_lto_p && DECL_INITIAL (exp) == error_mark_node)))
+ local_p = false;
/* Otherwise we're left with initialized (or non-common) global data
which is of necessity defined locally. */
- return true;
-}
-
-/* Assume ELF-ish defaults, since that's pretty much the most liberal
- wrt cross-module name binding. */
-
-bool
-default_binds_local_p (const_tree exp)
-{
- return default_binds_local_p_2 (exp, flag_shlib != 0, true);
-}
+ else
+ local_p = true;
-bool
-default_binds_local_p_1 (const_tree exp, int shlib)
-{
- return default_binds_local_p_2 (exp, shlib != 0, false);
+ return local_p;
}
/* Return true when references to DECL must bind to current definition in
@@ -6913,14 +6914,22 @@ decl_binds_to_current_def_p (const_tree
return false;
if (!TREE_PUBLIC (decl))
return true;
-
/* When resolution is available, just use it. */
- if (symtab_node *node = symtab_node::get (decl))
+ if (TREE_CODE (decl) == VAR_DECL
+ && (TREE_STATIC (decl) || DECL_EXTERNAL (decl)))
{
- if (node->resolution != LDPR_UNKNOWN)
+ varpool_node *vnode = varpool_node::get (decl);
+ if (vnode
+ && vnode->resolution != LDPR_UNKNOWN)
+ return resolution_to_local_definition_p (vnode->resolution);
+ }
+ else if (TREE_CODE (decl) == FUNCTION_DECL)
+ {
+ struct cgraph_node *node = cgraph_node::get (decl);
+ if (node
+ && node->resolution != LDPR_UNKNOWN)
return resolution_to_local_definition_p (node->resolution);
}
-
/* Otherwise we have to assume the worst for DECL_WEAK (hidden weaks
binds locally but still can be overwritten), DECL_COMMON (can be merged
with a non-common definition somewhere in the same module) or
@@ -7440,10 +7449,9 @@ default_elf_asm_output_external (FILE *f
{
/* We output the name if and only if TREE_SYMBOL_REFERENCED is
set in order to avoid putting out names that are never really
- used. Always output visibility specified in the source. */
+ used. */
if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))
- && (DECL_VISIBILITY_SPECIFIED (decl)
- || targetm.binds_local_p (decl)))
+ && targetm.binds_local_p (decl))
maybe_assemble_visibility (decl);
}
--- gcc/testsuite/gcc.target/i386/pr64317.c (revision 220674)
+++ gcc/testsuite/gcc.target/i386/pr64317.c (revision 220673)
@@ -1,7 +1,7 @@
/* { dg-do compile { target { *-*-linux* && ia32 } } } */
/* { dg-options "-O2 -fpie" } */
/* { dg-final { scan-assembler "addl\[ \\t\]+\[$\]_GLOBAL_OFFSET_TABLE_, %ebx" } } */
-/* { dg-final { scan-assembler "movl\[ \\t\]+c@GOTOFF\[(\]%ebx\[)\]" } } */
+/* { dg-final { scan-assembler "movl\[ \\t\]+c@GOT\[(\]%ebx\[)\]" } } */
/* { dg-final { scan-assembler-not "movl\[ \\t\]+\[0-9]+\[(\]%esp\[)\], %ebx" } } */
long c;
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