src/share/vm/shark/sharkConstant.cpp

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rev 3850 : [mq]: shark.patch


  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "precompiled.hpp"
  27 #include "ci/ciInstance.hpp"
  28 #include "ci/ciStreams.hpp"
  29 #include "shark/sharkBuilder.hpp"
  30 #include "shark/sharkConstant.hpp"
  31 #include "shark/sharkValue.hpp"
  32 
  33 using namespace llvm;
  34 
  35 SharkConstant* SharkConstant::for_ldc(ciBytecodeStream *iter) {
  36   ciConstant constant = iter->get_constant();
  37   ciType *type = NULL;
  38   if (constant.basic_type() == T_OBJECT) {
  39     ciEnv *env = ciEnv::current();
  40     if (constant.as_object()->is_klass())
  41       type = env->Class_klass();
  42     else
  43       type = env->String_klass();
  44   }
  45   return new SharkConstant(constant, type);
  46 }
  47 
  48 SharkConstant* SharkConstant::for_field(ciBytecodeStream *iter) {
  49   bool will_link;
  50   ciField *field = iter->get_field(will_link);
  51   assert(will_link, "typeflow responsibility");
  52 
  53   return new SharkConstant(field->constant_value(), field->type());
  54 }
  55 
  56 SharkConstant::SharkConstant(ciConstant constant, ciType *type) {
  57   SharkValue *value = NULL;
  58 
  59   switch (constant.basic_type()) {
  60   case T_BOOLEAN:
  61   case T_BYTE:
  62   case T_CHAR:
  63   case T_SHORT:


  91     ShouldNotReachHere();
  92   }
  93 
  94   // Handle primitive types.  We create SharkValues for these
  95   // now; doing so doesn't emit any code, and it allows us to
  96   // delegate a bunch of stuff to the SharkValue code.
  97   if (value) {
  98     _value       = value;
  99     _is_loaded   = true;
 100     _is_nonzero  = value->zero_checked();
 101     _is_two_word = value->is_two_word();
 102     return;
 103   }
 104 
 105   // Handle reference types.  This is tricky because some
 106   // ciObjects are psuedo-objects that refer to oops which
 107   // have yet to be created.  We need to spot the unloaded
 108   // objects (which differ between ldc* and get*, thanks!)
 109   ciObject *object = constant.as_object();
 110   assert(type != NULL, "shouldn't be");
 111   if (object->is_klass()) {
 112     // The constant returned for a klass is the ciKlass
 113     // for the entry, but we want the java_mirror.
 114     ciKlass *klass = object->as_klass();
 115     if (!klass->is_loaded()) {
 116       _is_loaded = false;
 117       return;
 118     }
 119     object = klass->java_mirror();
 120   }
 121   if (object->is_null_object() || !object->can_be_constant()) {

 122     _is_loaded = false;
 123     return;
 124   }
 125 
 126   _value       = NULL;
 127   _object      = object;
 128   _type        = type;
 129   _is_loaded   = true;
 130   _is_nonzero  = true;
 131   _is_two_word = false;
 132 }


  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "precompiled.hpp"
  27 #include "ci/ciInstance.hpp"
  28 #include "ci/ciStreams.hpp"
  29 #include "shark/sharkBuilder.hpp"
  30 #include "shark/sharkConstant.hpp"
  31 #include "shark/sharkValue.hpp"
  32 
  33 using namespace llvm;
  34 
  35 SharkConstant* SharkConstant::for_ldc(ciBytecodeStream *iter) {
  36   ciConstant constant = iter->get_constant();
  37   ciType *type = NULL;
  38   if (constant.basic_type() == T_OBJECT) {
  39     ciEnv *env = ciEnv::current();
  40     assert(constant.as_object()->klass() == env->String_klass() || constant.as_object()->klass() == env->Class_klass(), "should be");
  41     type = constant.as_object()->klass();


  42   }
  43   return new SharkConstant(constant, type);
  44 }
  45 
  46 SharkConstant* SharkConstant::for_field(ciBytecodeStream *iter) {
  47   bool will_link;
  48   ciField *field = iter->get_field(will_link);
  49   assert(will_link, "typeflow responsibility");
  50 
  51   return new SharkConstant(field->constant_value(), field->type());
  52 }
  53 
  54 SharkConstant::SharkConstant(ciConstant constant, ciType *type) {
  55   SharkValue *value = NULL;
  56 
  57   switch (constant.basic_type()) {
  58   case T_BOOLEAN:
  59   case T_BYTE:
  60   case T_CHAR:
  61   case T_SHORT:


  89     ShouldNotReachHere();
  90   }
  91 
  92   // Handle primitive types.  We create SharkValues for these
  93   // now; doing so doesn't emit any code, and it allows us to
  94   // delegate a bunch of stuff to the SharkValue code.
  95   if (value) {
  96     _value       = value;
  97     _is_loaded   = true;
  98     _is_nonzero  = value->zero_checked();
  99     _is_two_word = value->is_two_word();
 100     return;
 101   }
 102 
 103   // Handle reference types.  This is tricky because some
 104   // ciObjects are psuedo-objects that refer to oops which
 105   // have yet to be created.  We need to spot the unloaded
 106   // objects (which differ between ldc* and get*, thanks!)
 107   ciObject *object = constant.as_object();
 108   assert(type != NULL, "shouldn't be");
 109 
 110   if ((! object->is_null_object()) && object->klass() == ciEnv::current()->Class_klass()) {
 111     ciKlass *klass = object->klass();
 112     if (! klass->is_loaded()) {

 113       _is_loaded = false;
 114       return;
 115     }

 116   }
 117 
 118   if (object->is_null_object() || ! object->can_be_constant() || ! object->is_loaded()) {
 119     _is_loaded = false;
 120     return;
 121   }
 122 
 123   _value       = NULL;
 124   _object      = object;
 125   _type        = type;
 126   _is_loaded   = true;
 127   _is_nonzero  = true;
 128   _is_two_word = false;
 129 }