From b54c93b7b8602e91e284196327ad2646a01d2838 Mon Sep 17 00:00:00 2001
From: Joseph Myers <joseph@codesourcery.com>
Date: Mon, 13 Nov 2006 13:10:17 +0000
Subject: [PATCH] bpapi.h (TARGET_BPABI_CPP_BUILTINS): Define
__GXX_TYPEINFO_EQUALITY_INLINE but not __GXX_MERGED_TYPEINFO_NAMES.
gcc:
* config/arm/bpapi.h (TARGET_BPABI_CPP_BUILTINS): Define
__GXX_TYPEINFO_EQUALITY_INLINE but not
__GXX_MERGED_TYPEINFO_NAMES.
* config/arm/symbian.h (TARGET_OS_CPP_BUILTINS): Define
__GXX_MERGED_TYPEINFO_NAMES.
* config/i386/cygming.h (TARGET_OS_CPP_BUILTINS): Define
__GXX_TYPEINFO_EQUALITY_INLINE.
libstdc++-v3:
* libsupc++/typeinfo (__GXX_TYPEINFO_EQUALITY_INLINE): Define.
Use instead of __GXX_MERGED_TYPEINFO_NAMES to condition inline
definitions.
* libsupc++/tinfo.cc (operator==): Condition on
__GXX_TYPEINFO_EQUALITY_INLINE; check __GXX_MERGED_TYPEINFO_NAMES
to determine algorithm.
* libsupc++/tinfo2.cc (type_info::before): Likewise.
From-SVN: r118755
---
gcc/ChangeLog | 10 ++++++++++
gcc/config/arm/bpabi.h | 2 +-
gcc/config/arm/symbian.h | 17 ++++++++++-------
gcc/config/i386/cygming.h | 1 +
libstdc++-v3/ChangeLog | 10 ++++++++++
libstdc++-v3/libsupc++/tinfo.cc | 6 +++++-
libstdc++-v3/libsupc++/tinfo2.cc | 6 +++++-
libstdc++-v3/libsupc++/typeinfo | 30 +++++++++++++++++++++++++++++-
8 files changed, 71 insertions(+), 11 deletions(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 78798b24fa20..00039dc0ad91 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,13 @@
+2006-11-13 Joseph Myers <joseph@codesourcery.com>
+
+ * config/arm/bpapi.h (TARGET_BPABI_CPP_BUILTINS): Define
+ __GXX_TYPEINFO_EQUALITY_INLINE but not
+ __GXX_MERGED_TYPEINFO_NAMES.
+ * config/arm/symbian.h (TARGET_OS_CPP_BUILTINS): Define
+ __GXX_MERGED_TYPEINFO_NAMES.
+ * config/i386/cygming.h (TARGET_OS_CPP_BUILTINS): Define
+ __GXX_TYPEINFO_EQUALITY_INLINE.
+
2006-11-13 H.J. Lu <hongjiu.lu@intel.com>
Zdenek Dvorak <dvorakz@suse.cz>
diff --git a/gcc/config/arm/bpabi.h b/gcc/config/arm/bpabi.h
index 4c730885ec0e..71b2ec580c64 100644
--- a/gcc/config/arm/bpabi.h
+++ b/gcc/config/arm/bpabi.h
@@ -102,7 +102,7 @@
#define TARGET_BPABI_CPP_BUILTINS() \
do \
{ \
- builtin_define ("__GXX_MERGED_TYPEINFO_NAMES=0"); \
+ builtin_define ("__GXX_TYPEINFO_EQUALITY_INLINE=0"); \
} \
while (false)
diff --git a/gcc/config/arm/symbian.h b/gcc/config/arm/symbian.h
index af1ba9a64bb7..eca67db655c0 100644
--- a/gcc/config/arm/symbian.h
+++ b/gcc/config/arm/symbian.h
@@ -79,13 +79,16 @@
/* Define the __symbian__ macro. */
#undef TARGET_OS_CPP_BUILTINS
-#define TARGET_OS_CPP_BUILTINS() \
- do \
- { \
- /* Include the default BPABI stuff. */ \
- TARGET_BPABI_CPP_BUILTINS (); \
- builtin_define ("__symbian__"); \
- } \
+#define TARGET_OS_CPP_BUILTINS() \
+ do \
+ { \
+ /* Include the default BPABI stuff. */ \
+ TARGET_BPABI_CPP_BUILTINS (); \
+ /* Symbian OS does not support merging symbols across DLL \
+ boundaries. */ \
+ builtin_define ("__GXX_MERGED_TYPEINFO_NAMES=0"); \
+ builtin_define ("__symbian__"); \
+ } \
while (false)
/* On SymbianOS, these sections are not writable, so we use "a",
diff --git a/gcc/config/i386/cygming.h b/gcc/config/i386/cygming.h
index 957c02eaf311..9b0cd7f0c799 100644
--- a/gcc/config/i386/cygming.h
+++ b/gcc/config/i386/cygming.h
@@ -70,6 +70,7 @@ Boston, MA 02110-1301, USA. */
/* Even though linkonce works with static libs, this is needed \
to compare typeinfo symbols across dll boundaries. */ \
builtin_define ("__GXX_MERGED_TYPEINFO_NAMES=0"); \
+ builtin_define ("__GXX_TYPEINFO_EQUALITY_INLINE=0"); \
MAYBE_UWIN_CPP_BUILTINS (); \
EXTRA_OS_CPP_BUILTINS (); \
} \
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 0cb34970347e..bb9d08ce52c7 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,13 @@
+2006-11-13 Joseph Myers <joseph@codesourcery.com>
+
+ * libsupc++/typeinfo (__GXX_TYPEINFO_EQUALITY_INLINE): Define.
+ Use instead of __GXX_MERGED_TYPEINFO_NAMES to condition inline
+ definitions.
+ * libsupc++/tinfo.cc (operator==): Condition on
+ __GXX_TYPEINFO_EQUALITY_INLINE; check __GXX_MERGED_TYPEINFO_NAMES
+ to determine algorithm.
+ * libsupc++/tinfo2.cc (type_info::before): Likewise.
+
2006-11-12 Paolo Carlini <pcarlini@suse.de>
* include/ext/bitmap_allocator.h: Uglify some names.
diff --git a/libstdc++-v3/libsupc++/tinfo.cc b/libstdc++-v3/libsupc++/tinfo.cc
index a16488b5fbea..a153c2d4d4c5 100644
--- a/libstdc++-v3/libsupc++/tinfo.cc
+++ b/libstdc++-v3/libsupc++/tinfo.cc
@@ -44,13 +44,17 @@ std::type_info::
std::bad_cast::~bad_cast() throw() { }
std::bad_typeid::~bad_typeid() throw() { }
-#if !__GXX_MERGED_TYPEINFO_NAMES
+#if !__GXX_TYPEINFO_EQUALITY_INLINE
// We can't rely on common symbols being shared between shared objects.
bool std::type_info::
operator== (const std::type_info& arg) const
{
+#if __GXX_MERGED_TYPEINFO_NAMES
+ return name () == arg.name ();
+#else
return (&arg == this) || (__builtin_strcmp (name (), arg.name ()) == 0);
+#endif
}
#endif
diff --git a/libstdc++-v3/libsupc++/tinfo2.cc b/libstdc++-v3/libsupc++/tinfo2.cc
index 2f5a2cd32bcb..8fdcac3604a7 100644
--- a/libstdc++-v3/libsupc++/tinfo2.cc
+++ b/libstdc++-v3/libsupc++/tinfo2.cc
@@ -38,12 +38,16 @@ extern "C" void abort ();
using std::type_info;
-#if !__GXX_MERGED_TYPEINFO_NAMES
+#if !__GXX_TYPEINFO_EQUALITY_INLINE
bool
type_info::before (const type_info &arg) const
{
+#if __GXX_MERGED_TYPEINFO_NAMES
+ return name () < arg.name ();
+#else
return __builtin_strcmp (name (), arg.name ()) < 0;
+#endif
}
#endif
diff --git a/libstdc++-v3/libsupc++/typeinfo b/libstdc++-v3/libsupc++/typeinfo
index bd7ce6767a7f..fb5957d30dd8 100644
--- a/libstdc++-v3/libsupc++/typeinfo
+++ b/libstdc++-v3/libsupc++/typeinfo
@@ -46,6 +46,22 @@ namespace __cxxabiv1
class __class_type_info;
} // namespace __cxxabiv1
+// Determine whether typeinfo names for the same type are merged (in which
+// case comparison can just compare pointers) or not (in which case
+// strings must be compared and g++.dg/abi/local1.C will fail), and
+// whether comparison is to be implemented inline or not. By default we
+// use inline pointer comparison if weak symbols are available, and
+// out-of-line strcmp if not. Out-of-line pointer comparison is used
+// where the object files are to be portable to multiple systems, some of
+// which may not be able to use pointer comparison, but the particular
+// system for which libstdc++ is being built can use pointer comparison;
+// in particular for most ARM EABI systems, where the ABI specifies
+// out-of-line comparison. Inline strcmp is not currently supported. The
+// compiler's target configuration can override the defaults by defining
+// __GXX_TYPEINFO_EQUALITY_INLINE to 1 or 0 to indicate whether or not
+// comparison is inline, and __GXX_MERGED_TYPEINFO_NAMES to 1 or 0 to
+// indicate whether or not pointer comparison can be used.
+
#ifndef __GXX_MERGED_TYPEINFO_NAMES
#if !__GXX_WEAK__
// If weak symbols are not supported, typeinfo names are not merged.
@@ -56,6 +72,15 @@ namespace __cxxabiv1
#endif
#endif
+// By default follow the same rules as for __GXX_MERGED_TYPEINFO_NAMES.
+#ifndef __GXX_TYPEINFO_EQUALITY_INLINE
+ #if !__GXX_WEAK__
+ #define __GXX_TYPEINFO_EQUALITY_INLINE 0
+ #else
+ #define __GXX_TYPEINFO_EQUALITY_INLINE 1
+ #endif
+#endif
+
namespace std
{
/**
@@ -91,13 +116,16 @@ namespace std
const char* name() const
{ return __name; }
-#if !__GXX_MERGED_TYPEINFO_NAMES
+#if !__GXX_TYPEINFO_EQUALITY_INLINE
bool before(const type_info& __arg) const;
// In old abi, or when weak symbols are not supported, there can
// be multiple instances of a type_info object for one
// type. Uniqueness must use the _name value, not object address.
bool operator==(const type_info& __arg) const;
#else
+ #if !__GXX_MERGED_TYPEINFO_NAMES
+ #error "Inline implementation of type_info comparision requires merging of type_info objects"
+ #endif
/** Returns true if @c *this precedes @c __arg in the implementation's
* collation order. */
// In new abi we can rely on type_info's NTBS being unique,
--
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