Mercurial > hg > truffle
diff src/share/vm/ci/bcEscapeAnalyzer.hpp @ 45:48a3fa21394b
6667615: (Escape Analysis) extend MDO to cache arguments escape state
Summary: Use MDO to cache arguments escape state determined by the byte code escape analyzer.
Reviewed-by: never
| author | kvn |
|---|---|
| date | Tue, 11 Mar 2008 19:00:38 -0700 |
| parents | a61af66fc99e |
| children | e1e86702e43e |
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--- a/src/share/vm/ci/bcEscapeAnalyzer.hpp Tue Mar 11 11:25:13 2008 -0700 +++ b/src/share/vm/ci/bcEscapeAnalyzer.hpp Tue Mar 11 19:00:38 2008 -0700 @@ -46,9 +46,12 @@ BitMap _arg_stack; BitMap _arg_returned; BitMap _dirty; + enum{ ARG_OFFSET_MAX = 31}; + uint *_arg_modified; bool _return_local; bool _allocated_escapes; + bool _unknown_modified; bool _return_allocated; ciObjectList _dependencies; @@ -80,6 +83,7 @@ void set_method_escape(ArgumentMap vars); void set_global_escape(ArgumentMap vars); void set_dirty(ArgumentMap vars); + void set_modified(ArgumentMap vars, int offs, int size); bool is_recursive_call(ciMethod* callee); void add_dependence(ciKlass *klass, ciMethod *meth); @@ -140,6 +144,13 @@ return !_conservative && _return_allocated && !_allocated_escapes; } + // Tracking of argument modification + + enum {OFFSET_ANY = -1}; + bool is_arg_modified(int arg, int offset, int size_in_bytes); + void set_arg_modified(int arg, int offset, int size_in_bytes); + bool has_non_arg_side_affects() { return _unknown_modified; } + // Copy dependencies from this analysis into "deps" void copy_dependencies(Dependencies *deps); };