460 void MethodLiveness::BasicBlock::compute_gen_kill_range(ciBytecodeStream *bytes) {
461 _gen.clear();
462 _kill.clear();
463
464 while (bytes->next() != ciBytecodeStream::EOBC()) {
465 compute_gen_kill_single(bytes);
466 }
467 }
468
469 void MethodLiveness::BasicBlock::compute_gen_kill_single(ciBytecodeStream *instruction) {
470 // We prohibit _gen and _kill from having locals in common. If we
471 // know that one is definitely going to be applied before the other,
472 // we could save some computation time by relaxing this prohibition.
473
474 switch (instruction->cur_bc()) {
475 case Bytecodes::_nop:
476 case Bytecodes::_goto:
477 case Bytecodes::_goto_w:
478 case Bytecodes::_aconst_null:
479 case Bytecodes::_new:
480 case Bytecodes::_iconst_m1:
481 case Bytecodes::_iconst_0:
482 case Bytecodes::_iconst_1:
483 case Bytecodes::_iconst_2:
484 case Bytecodes::_iconst_3:
485 case Bytecodes::_iconst_4:
486 case Bytecodes::_iconst_5:
487 case Bytecodes::_fconst_0:
488 case Bytecodes::_fconst_1:
489 case Bytecodes::_fconst_2:
490 case Bytecodes::_bipush:
491 case Bytecodes::_sipush:
492 case Bytecodes::_lconst_0:
493 case Bytecodes::_lconst_1:
494 case Bytecodes::_dconst_0:
495 case Bytecodes::_dconst_1:
496 case Bytecodes::_ldc2_w:
497 case Bytecodes::_ldc:
498 case Bytecodes::_ldc_w:
499 case Bytecodes::_iaload:
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460 void MethodLiveness::BasicBlock::compute_gen_kill_range(ciBytecodeStream *bytes) {
461 _gen.clear();
462 _kill.clear();
463
464 while (bytes->next() != ciBytecodeStream::EOBC()) {
465 compute_gen_kill_single(bytes);
466 }
467 }
468
469 void MethodLiveness::BasicBlock::compute_gen_kill_single(ciBytecodeStream *instruction) {
470 // We prohibit _gen and _kill from having locals in common. If we
471 // know that one is definitely going to be applied before the other,
472 // we could save some computation time by relaxing this prohibition.
473
474 switch (instruction->cur_bc()) {
475 case Bytecodes::_nop:
476 case Bytecodes::_goto:
477 case Bytecodes::_goto_w:
478 case Bytecodes::_aconst_null:
479 case Bytecodes::_new:
480 case Bytecodes::_defaultvalue:
481 case Bytecodes::_withfield:
482 case Bytecodes::_iconst_m1:
483 case Bytecodes::_iconst_0:
484 case Bytecodes::_iconst_1:
485 case Bytecodes::_iconst_2:
486 case Bytecodes::_iconst_3:
487 case Bytecodes::_iconst_4:
488 case Bytecodes::_iconst_5:
489 case Bytecodes::_fconst_0:
490 case Bytecodes::_fconst_1:
491 case Bytecodes::_fconst_2:
492 case Bytecodes::_bipush:
493 case Bytecodes::_sipush:
494 case Bytecodes::_lconst_0:
495 case Bytecodes::_lconst_1:
496 case Bytecodes::_dconst_0:
497 case Bytecodes::_dconst_1:
498 case Bytecodes::_ldc2_w:
499 case Bytecodes::_ldc:
500 case Bytecodes::_ldc_w:
501 case Bytecodes::_iaload:
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