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| author | Mark Mitchell <mark@codesourcery.com> | 2007-02-11 18:58:05 +0000 |
|---|---|---|
| committer | Mark Mitchell <mmitchel@gcc.gnu.org> | 2007-02-11 18:58:05 +0000 |
| commit | 56fd65c7d9a3fd9ab80a627eb6caf24483801ff5 (patch) | |
| tree | 37425a6a59c6e2da923d37b739cbb1c65f2cfbd9 /gcc/tree.h | |
| parent | f57d17f1fc2f31047644ed6f18f1087f65f8f88b (diff) | |
| download | gcc-56fd65c7d9a3fd9ab80a627eb6caf24483801ff5.tar.gz | |
re PR target/29487 (Shared libstdc++ fails to link)
PR target/29487
* tree.h (DECL_REPLACEABLE_P): New macro.
* except.c (set_nothrow_function_flags): Likewise.
PR target/29487
* decl.c (finish_function): Use DECL_REPLACEABLE.
* tree.c (cp_cannot_inline_tree_fn): Likewise.
PR c++/29487
* g++.dg/eh/weak1-C: New test.
* g++.dg/eh/weak1-a.cc: Likewise.
* g++.dg/eh/comdat1.C: Likewise.
From-SVN: r121819
Diffstat (limited to 'gcc/tree.h')
| -rw-r--r-- | gcc/tree.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/tree.h b/gcc/tree.h index 26e0676d0c2..c672d94d0c0 100644 --- a/gcc/tree.h +++ b/gcc/tree.h @@ -2901,6 +2901,26 @@ extern void decl_restrict_base_insert (tree, tree); something which is DECL_COMDAT. */ #define DECL_COMDAT(NODE) (DECL_WITH_VIS_CHECK (NODE)->decl_with_vis.comdat_flag) +/* A replaceable function is one which may be replaced at link-time + with an entirely different definition, provided that the + replacement has the same type. For example, functions declared + with __attribute__((weak)) on most systems are replaceable. + + COMDAT functions are not replaceable, since all definitions of the + function must be equivalent. It is important that COMDAT functions + not be treated as replaceable so that use of C++ template + instantiations is not penalized. + + For example, DECL_REPLACEABLE is used to determine whether or not a + function (including a template instantiation) which is not + explicitly declared "inline" can be inlined. If the function is + DECL_REPLACEABLE then it is not safe to do the inlining, since the + implementation chosen at link-time may be different. However, a + function that is not DECL_REPLACEABLE can be inlined, since all + versions of the function will be functionally identical. */ +#define DECL_REPLACEABLE_P(NODE) \ + (!DECL_COMDAT (NODE) && !targetm.binds_local_p (NODE)) + /* The name of the object as the assembler will see it (but before any translations made by ASM_OUTPUT_LABELREF). Often this is the same as DECL_NAME. It is an IDENTIFIER_NODE. */ |