Mercurial > hg > truffle
diff src/share/vm/opto/matcher.hpp @ 775:93c14e5562c4
6823354: Add intrinsics for {Integer,Long}.{numberOfLeadingZeros,numberOfTrailingZeros}()
Summary: These methods can be instrinsified by using bit scan, bit test, and population count instructions.
Reviewed-by: kvn, never
| author | twisti |
|---|---|
| date | Wed, 06 May 2009 00:27:52 -0700 |
| parents | 04fa5affa478 |
| children | bd02caa94611 |
line wrap: on
line diff
--- a/src/share/vm/opto/matcher.hpp Tue May 05 11:02:10 2009 -0700 +++ b/src/share/vm/opto/matcher.hpp Wed May 06 00:27:52 2009 -0700 @@ -225,10 +225,16 @@ OptoRegPair *_parm_regs; // Array of machine registers per argument RegMask *_calling_convention_mask; // Array of RegMasks per argument - // Does matcher support this ideal node? + // Does matcher have a match rule for this ideal node? static const bool has_match_rule(int opcode); static const bool _hasMatchRule[_last_opcode]; + // Does matcher have a match rule for this ideal node and is the + // predicate (if there is one) true? + // NOTE: If this function is used more commonly in the future, ADLC + // should generate this one. + static const bool match_rule_supported(int opcode); + // Used to determine if we have fast l2f conversion // USII has it, USIII doesn't static const bool convL2FSupported(void);