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| author | Richard Henderson <rth@redhat.com> | 2002-04-03 14:39:51 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2002-04-03 14:39:51 -0800 |
| commit | ef4f94ac977780ceb14adc8dcbcc2eb2c23b5425 (patch) | |
| tree | fd1d1d700f54be42454fcc88e95011014edff3f4 /gcc/langhooks.c | |
| parent | 599bba86dffe8bd03676f4bf50bca436d3112b90 (diff) | |
| download | gcc-ef4f94ac977780ceb14adc8dcbcc2eb2c23b5425.zip gcc-ef4f94ac977780ceb14adc8dcbcc2eb2c23b5425.tar.gz gcc-ef4f94ac977780ceb14adc8dcbcc2eb2c23b5425.tar.bz2 | |
re PR rtl-optimization/4330 (Optimizer generates illegal assembly code)
PR opt/4330
* langhooks.h (lang_hooks.decls.warn_unused_global): New.
* toplev.c (check_global_declarations): Use it.
* langhooks-def.h (lhd_warn_unused_global_decl): Declare.
(LANG_HOOKS_WARN_UNUSED_GLOBAL_DECL): New.
(LANG_HOOKS_DECLS): Add it.
* langhooks.c (lhd_warn_unused_global_decl): New.
* c-decl.c (LANG_HOOKS_WARN_UNUSED_GLOBAL_DECL): New.
* c-objc-common.c (c_warn_unused_global_decl): New.
* c-tree.h (c_warn_unused_global_decl): Declare.
* objc/objc-lang.c (LANG_HOOKS_WARN_UNUSED_GLOBAL_DECL): New.
* cp-lang.c (cxx_warn_unused_global_decl): New.
(LANG_HOOKS_WARN_UNUSED_GLOBAL_DECL): New.
* g++.dg/warn/Wunused-2.C: New.
* gcc.dg/unused-4.c: New.
From-SVN: r51818
Diffstat (limited to 'gcc/langhooks.c')
| -rw-r--r-- | gcc/langhooks.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/gcc/langhooks.c b/gcc/langhooks.c index 4cdb8ab..128e6de 100644 --- a/gcc/langhooks.c +++ b/gcc/langhooks.c @@ -113,6 +113,25 @@ lhd_staticp (exp) return 0; } +/* Called from check_global_declarations. */ + +bool +lhd_warn_unused_global_decl (decl) + tree decl; +{ + /* This is what used to exist in check_global_declarations. Probably + not many of these actually apply to non-C languages. */ + + if (TREE_CODE (decl) == FUNCTION_DECL && DECL_INLINE (decl)) + return false; + if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl)) + return false; + if (DECL_IN_SYSTEM_HEADER (decl)) + return false; + + return true; +} + /* Called when -dy is given on the command line. */ void |