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comparison src/share/vm/opto/connode.cpp @ 9060:cc32ccaaf47f

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8003310: Enable -Wunused-function when compiling with gcc Summary: Add the -Wunused-function flag and remove a number of unused functions. Reviewed-by: dholmes, coleenp, kvn
author mikael
date Thu, 04 Apr 2013 10:01:26 -0700
parents 8e47bac5643a
children 7944aba7ba41
comparison
equal deleted inserted replaced
9059:17bf4d428955 9060:cc32ccaaf47f
461 // If input is already higher or equal to cast type, then this is an identity. 461 // If input is already higher or equal to cast type, then this is an identity.
462 Node *CheckCastPPNode::Identity( PhaseTransform *phase ) { 462 Node *CheckCastPPNode::Identity( PhaseTransform *phase ) {
463 // Toned down to rescue meeting at a Phi 3 different oops all implementing 463 // Toned down to rescue meeting at a Phi 3 different oops all implementing
464 // the same interface. CompileTheWorld starting at 502, kd12rc1.zip. 464 // the same interface. CompileTheWorld starting at 502, kd12rc1.zip.
465 return (phase->type(in(1)) == phase->type(this)) ? in(1) : this; 465 return (phase->type(in(1)) == phase->type(this)) ? in(1) : this;
466 }
467
468 // Determine whether "n" is a node which can cause an alias of one of its inputs. Node types
469 // which can create aliases are: CheckCastPP, Phi, and any store (if there is also a load from
470 // the location.)
471 // Note: this checks for aliases created in this compilation, not ones which may
472 // be potentially created at call sites.
473 static bool can_cause_alias(Node *n, PhaseTransform *phase) {
474 bool possible_alias = false;
475
476 if (n->is_Store()) {
477 possible_alias = !n->as_Store()->value_never_loaded(phase);
478 } else {
479 int opc = n->Opcode();
480 possible_alias = n->is_Phi() ||
481 opc == Op_CheckCastPP ||
482 opc == Op_StorePConditional ||
483 opc == Op_CompareAndSwapP ||
484 opc == Op_CompareAndSwapN ||
485 opc == Op_GetAndSetP ||
486 opc == Op_GetAndSetN;
487 }
488 return possible_alias;
489 } 466 }
490 467
491 //------------------------------Value------------------------------------------ 468 //------------------------------Value------------------------------------------
492 // Take 'join' of input and cast-up type, unless working with an Interface 469 // Take 'join' of input and cast-up type, unless working with an Interface
493 const Type *CheckCastPPNode::Value( PhaseTransform *phase ) const { 470 const Type *CheckCastPPNode::Value( PhaseTransform *phase ) const {