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The default mode for C++ is now -std=gnu++14 instead of -std=gnu++98. Type-based alias analysis now disambiguates accesses to different pointers. This improves precision of the alias oracle by about 20-30% on higher-level C++ programs. Programs doing invalid type punning of pointer types may now need -fno-strict-aliasing to work correctly. Value range propagation now assumes that the this pointer of C++ member functions is non-null. This eliminates common null pointer checks but also breaks some non-conforming code-bases (such as Qt-5, Chromium, KDevelop). As a temporary work-around -fno-delete-null-pointer-checks can be used. Wrong code can be identified by using -fsanitize=undefined. There have been significant improvements around link-time optimization and inter-procedural optimization and some support for OpenACC (though probably not tested on FreeBSD) and version 4.5 of the OpenMP specification. Source locations for the C and C++ compilers are now tracked as ranges and diagnostics can now contain "fix-it hints". New command-line options include -Wshift-negative-value, -Wshift-overflow, -Wtautological-compare, -Wnull-dereference, -Wduplicated-cond, and -Wmisleading-indentation. C++ Concepts are now supported when compiling with -fconcepts, and there are several other improvements around support for newer C++ features as well as in the libstdc++ library. Fortran now features Fortran 2008 SUBMODULE support, Fortran 2015 EVENT_TYPE, EVENT_POST, EVENT_WAIT, and EVENT_QUERY support, and improved support for OpenMP and OpenACC. A lot has happened on the AArch64 and ARM fronts, on x86-64 there is now Skylake with AVX-512 support, AMD instructions monitorx and mwaitx, and support for address spaces __seg_fs, __seg_gs, and __seg_tl, as well as AMD Zen (family 17h) processors, and basic support has been added for POWER9. https://gcc.gnu.org/gcc-6/changes.html has a more extensive set of changes and https://gcc.gnu.org/gcc-6/porting_to.html has a solid overview of issue you may encountering porting to this new version.
106 lines
3.4 KiB
Text
106 lines
3.4 KiB
Text
--- UTC
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Index: gcc/ginclude/unwind-arm-common.h
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===================================================================
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--- gcc/ginclude/unwind-arm-common.h (revision 219113)
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+++ gcc/ginclude/unwind-arm-common.h (working copy)
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@@ -82,7 +82,11 @@
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struct _Unwind_Control_Block
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{
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+#ifdef __FreeBSD__
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+ unsigned exception_class __attribute__((__mode__(__DI__)));
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+#else
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char exception_class[8];
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+#endif
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void (*exception_cleanup)(_Unwind_Reason_Code, _Unwind_Control_Block *);
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/* Unwinder cache, private fields for the unwinder's use */
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struct
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@@ -181,7 +185,11 @@
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/* Support functions for the PR. */
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#define _Unwind_Exception _Unwind_Control_Block
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+#ifdef __FreeBSD__
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+ typedef unsigned _Unwind_Exception_Class __attribute__((__mode__(__DI__)));
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+#else
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typedef char _Unwind_Exception_Class[8];
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+#endif
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void * _Unwind_GetLanguageSpecificData (_Unwind_Context *);
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_Unwind_Ptr _Unwind_GetRegionStart (_Unwind_Context *);
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Index: libstdc++-v3/libsupc++/unwind-cxx.h
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===================================================================
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--- libstdc++-v3/libsupc++/unwind-cxx.h (revision 219147)
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+++ libstdc++-v3/libsupc++/unwind-cxx.h (working copy)
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@@ -235,7 +235,7 @@
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return reinterpret_cast<__cxa_dependent_exception *>(exc + 1) - 1;
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}
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-#ifdef __ARM_EABI_UNWINDER__
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+#if defined(__ARM_EABI_UNWINDER__) && !defined(__FreeBSD__)
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static inline bool
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__is_gxx_exception_class(_Unwind_Exception_Class c)
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{
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@@ -309,13 +309,7 @@
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c[6] = 'R';
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c[7] = '\0';
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}
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-
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-static inline void*
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-__gxx_caught_object(_Unwind_Exception* eo)
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-{
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- return (void*)eo->barrier_cache.bitpattern[0];
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-}
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-#else // !__ARM_EABI_UNWINDER__
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+#else // !__ARM_EABI_UNWINDER__ || __FreeBSD__
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// This is the primary exception class we report -- "GNUCC++\0".
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const _Unwind_Exception_Class __gxx_primary_exception_class
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= ((((((((_Unwind_Exception_Class) 'G'
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@@ -339,6 +333,16 @@
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<< 8 | (_Unwind_Exception_Class) '+')
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<< 8 | (_Unwind_Exception_Class) '\x01');
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+const _Unwind_Exception_Class __gxx_forced_unwind_class
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+= ((((((((_Unwind_Exception_Class) 'G'
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+ << 8 | (_Unwind_Exception_Class) 'N')
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+ << 8 | (_Unwind_Exception_Class) 'U')
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+ << 8 | (_Unwind_Exception_Class) 'C')
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+ << 8 | (_Unwind_Exception_Class) 'F')
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+ << 8 | (_Unwind_Exception_Class) 'O')
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+ << 8 | (_Unwind_Exception_Class) 'R')
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+ << 8 | (_Unwind_Exception_Class) '\0');
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+
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static inline bool
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__is_gxx_exception_class(_Unwind_Exception_Class c)
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{
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@@ -346,6 +350,12 @@
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|| c == __gxx_dependent_exception_class;
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}
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+static inline bool
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+__is_gxx_forced_unwind_class(_Unwind_Exception_Class c)
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+{
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+ return c == __gxx_forced_unwind_class;
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+}
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+
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// Only checks for primary or dependent, but not that it is a C++ exception at
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// all.
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static inline bool
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@@ -357,7 +367,18 @@
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#define __GXX_INIT_PRIMARY_EXCEPTION_CLASS(c) c = __gxx_primary_exception_class
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#define __GXX_INIT_DEPENDENT_EXCEPTION_CLASS(c) \
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c = __gxx_dependent_exception_class
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+#define __GXX_INIT_FORCED_UNWIND_CLASS(c) c = __gxx_forced_unwind_class
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+#endif // __ARM_EABI_UNWINDER__ && !__FreeBSD__
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+#ifdef __ARM_EABI_UNWINDER__
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+static inline void*
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+__gxx_caught_object(_Unwind_Exception* eo)
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+{
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+ return (void*)eo->barrier_cache.bitpattern[0];
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+}
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+
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+#else // !__ARM_EABI_UNWINDER__
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+
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// GNU C++ personality routine, Version 0.
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extern "C" _Unwind_Reason_Code __gxx_personality_v0
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(int, _Unwind_Action, _Unwind_Exception_Class,
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