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72 lines
2.8 KiB
Diff
72 lines
2.8 KiB
Diff
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Workaround for buglet in std::vector etc. when compiling
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with gcc-4.0.1 -Wall -O -fno-exceptions
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Fixes:
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.../include/c++/4.0.0/bits/vector.tcc: In member function 'void std::vector<_Tp,
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_Alloc>::reserve(size_t) [with _Tp = int, _Alloc = std::allocator<int>]':
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.../include/c++/4.0.0/bits/vector.tcc:78: warning: control may reach end of
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non-void function 'typename _Alloc::pointer std::vector<_Tp,
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_Alloc>::_M_allocate_and_copy(size_t, _ForwardIterator, _ForwardIterator) [with
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_ForwardIterator = int*, _Tp = int, _Alloc = std::allocator<int>]' being inlined
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See http://gcc.gnu.org/PR21951
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To: gcc-patches at gcc dot gnu dot org
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Subject: [4.0.x] may reach end warning in system headers
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Message-Id: <20050701183024.E138714C16A9@geoffk5.apple.com>
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Date: Fri, 1 Jul 2005 11:30:24 -0700 (PDT)
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From: gkeating at apple dot com (Geoffrey Keating)
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One of our users was getting
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/usr/include/gcc/darwin/4.0/c++/bits/stl_uninitialized.h:113: warning:
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control may reach end of non-void function '_ForwardIterator
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std::__uninitialized_copy_aux(_InputIterator, _InputIterator,
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_ForwardIterator, __false_type) [with _InputIterator =
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__gnu_cxx::__normal_iterator<TPoolAllocator::tAllocState*,
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std::vector<TPoolAllocator::tAllocState,
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std::allocator<TPoolAllocator::tAllocState> > >, _ForwardIterator =
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__gnu_cxx::__normal_iterator<TPoolAllocator::tAllocState*,
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std::vector<TPoolAllocator::tAllocState,
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std::allocator<TPoolAllocator::tAllocState> > >]' being inlined
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which shouldn't be happening, he has no way to change a standard C++
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header. The warning is bogus anyway, but it's fixed in 4.1 through
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the CFG changes, which I don't really want to backport to the 4.0
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branch, so instead I'll add this patch. Other warnings generated from
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tree-inline.c check for DECL_SYSTEM_HEADER like this.
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Bootstrapped & tested on powerpc-darwin8, I'll commit when the branch
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is unfrozen.
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--
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- Geoffrey Keating <geoffk@apple.com>
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===File ~/patches/gcc-40-4121982.patch======================
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Index: ChangeLog
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2005-06-28 Geoffrey Keating <geoffk@apple.com>
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* tree-inline.c (expand_call_inline): Prevent 'may reach end'
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warning in system headers.
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Index: tree-inline.c
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===================================================================
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RCS file: /cvs/gcc/gcc/gcc/tree-inline.c,v
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retrieving revision 1.170.8.4
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diff -u -p -u -p -r1.170.8.4 tree-inline.c
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--- gcc-4.0.1/gcc/tree-inline.c.old 6 Jun 2005 19:20:32 -0000 1.170.8.4
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+++ gcc-4.0.1/gcc/tree-inline.c 1 Jul 2005 18:27:26 -0000
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@@ -1693,7 +1693,8 @@ expand_call_inline (tree *tp, int *walk_
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&& !TREE_NO_WARNING (fn)
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&& !VOID_TYPE_P (TREE_TYPE (TREE_TYPE (fn)))
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&& return_slot_addr == NULL_TREE
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- && block_may_fallthru (copy))
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+ && block_may_fallthru (copy)
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+ && !DECL_IN_SYSTEM_HEADER (fn))
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{
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warning ("control may reach end of non-void function %qD being inlined",
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fn);
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============================================================
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