Mercurial > hg > truffle
comparison src/share/vm/opto/matcher.hpp @ 6848:8e47bac5643a
7054512: Compress class pointers after perm gen removal
Summary: support of compress class pointers in the compilers.
Reviewed-by: kvn, twisti
| author | roland |
|---|---|
| date | Tue, 09 Oct 2012 10:11:38 +0200 |
| parents | 859c45fb8cea |
| children | adb9a7d94cb5 |
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| 6847:65d07d9ee446 | 6848:8e47bac5643a |
|---|---|
| 378 // be subsumed into complex addressing expressions or compute them into | 378 // be subsumed into complex addressing expressions or compute them into |
| 379 // registers? True for Intel but false for most RISCs | 379 // registers? True for Intel but false for most RISCs |
| 380 static const bool clone_shift_expressions; | 380 static const bool clone_shift_expressions; |
| 381 | 381 |
| 382 static bool narrow_oop_use_complex_address(); | 382 static bool narrow_oop_use_complex_address(); |
| 383 static bool narrow_klass_use_complex_address(); | |
| 383 | 384 |
| 384 // Generate implicit null check for narrow oops if it can fold | 385 // Generate implicit null check for narrow oops if it can fold |
| 385 // into address expression (x64). | 386 // into address expression (x64). |
| 386 // | 387 // |
| 387 // [R12 + narrow_oop_reg<<3 + offset] // fold into address expression | 388 // [R12 + narrow_oop_reg<<3 + offset] // fold into address expression |