Mercurial > hg > truffle
comparison src/share/vm/opto/matcher.hpp @ 368:36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
Summary: Push DecodeN node below the Null check to the non-null path to use the mach node without 0 test.
Reviewed-by: rasbold, never
| author | kvn |
|---|---|
| date | Tue, 23 Sep 2008 12:29:06 -0700 |
| parents | 9c2ecc2ffb12 |
| children | 4d9884b01ba6 |
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| 367:194b8e3a2fc4 | 368:36ccc817fca4 |
|---|---|
| 164 static bool is_spillable_arg( int reg ); | 164 static bool is_spillable_arg( int reg ); |
| 165 | 165 |
| 166 // List of IfFalse or IfTrue Nodes that indicate a taken null test. | 166 // List of IfFalse or IfTrue Nodes that indicate a taken null test. |
| 167 // List is valid in the post-matching space. | 167 // List is valid in the post-matching space. |
| 168 Node_List _null_check_tests; | 168 Node_List _null_check_tests; |
| 169 void collect_null_checks( Node *proj ); | 169 void collect_null_checks( Node *proj, Node *orig_proj ); |
| 170 void validate_null_checks( ); | 170 void validate_null_checks( ); |
| 171 | 171 |
| 172 Matcher( Node_List &proj_list ); | 172 Matcher( Node_List &proj_list ); |
| 173 | 173 |
| 174 // Select instructions for entire method | 174 // Select instructions for entire method |