Abstract: A computer-implemented process for creating a packed data object, the computer-implemented process comprising providing instrumentation to an enhanced runtime by an enhanced compiler for a computer executable program portion, detecting a special class in the computer executable program portion by the enhanced runtime, creating an internal representation of a packed data object header using the instrumentation, calculating a size of elements for a packed data object associated with the computer executable program portion, determining a type of packed data object using information in the packed data object header, and responsive to a determination that the type of packed data object is an on-heap packed data object, storing the packed data object header and associated packed data object data together for the packed data object in a memory heap.

Abstract: A batching mechanism is provided that batches multiple Java Native Interface calls together such that the batch crosses the Java Native Interface boundary in a single transition. The batching mechanism operates by identifying a sequence of Java Native Interface calls to be made by native code, by encapsulating the identified sequence of Java Native Interface calls into a batch, and by communicating the batch as a single transition across the Java Native Interface boundary. In this manner, each call of the batch is encapsulated by iteratively performing for each call to be made, processes including identifying the Java Native Interface function to call, identifying the arguments to pass into the Java Native Interface function, dispatching to the Java Native Interface function and capturing the return value.

Abstract: One embodiment of a method for eliminating redundant operations establishing common properties includes identifying a first virtual register storing a first value having a common property. The method may assign the first virtual register to use a real register. The method may further identify a second virtual register storing a second value also having the common property. The method may assign the second virtual register to use the same real register after the first value is no longer live. As a result of assigning the second virtual register to the first real register, the method may eliminate an operation configured to establish the common property for the second virtual register since this operation is redundant and is no longer needed.

Abstract: A computer-implemented process for creating a packed data object, the computer-implemented process comprising providing instrumentation to an enhanced runtime by an enhanced compiler for a computer executable program portion, detecting a special class in the computer executable program portion by the enhanced runtime, creating an internal representation of a packed data object header using the instrumentation, calculating a size of elements for a packed data object associated with the computer executable program portion, determining a type of packed data object using information in the packed data object header, and responsive to a determination that the type of packed data object is an on-heap packed data object, storing the packed data object header and associated packed data object data together for the packed data object in a memory heap.

Abstract: A batching mechanism is provided that batches multiple Java Native Interface calls together such that the batch crosses the Java Native Interface boundary in a single transition. The batching mechanism operates by identifying a sequence of Java Native Interface calls to be made by native code, by encapsulating the identified sequence of Java Native Interface calls into a batch, and by communicating the batch as a single transition across the Java Native Interface boundary. In this manner, each call of the batch is encapsulated by iteratively performing for each call to be made, processes including identifying the Java Native Interface function to call, identifying the arguments to pass into the Java Native Interface function, dispatching to the Java Native Interface function and capturing the return value.

Abstract: An enhanced function-descriptor-based dispatch in a multi-linkage environment receives user code containing a function compiled in a supplementary linkage convention of a caller to form an invoked function and determines whether the supplementary linkage convention of the caller for the invoked function matches a supplementary linkage implementation provided by a library. Responsive to a determination that the supplementary linkage convention of the caller for the invoked function matches a supplementary linkage implementation provided by the library, an embodiment selects the supplementary linkage implementation provided by the library and dispatches the invoked function in the selected supplementary linkage implementation provided by the library.

Abstract: One embodiment of a method for eliminating redundant operations establishing common properties includes identifying a first virtual register storing a first value having a common property. The method may assign the first virtual register to use a real register. The method may further identify a second virtual register storing a second value also having the common property. The method may assign the second virtual register to use the same real register after the first value is no longer live. As a result of assigning the second virtual register to the first real register, the method may eliminate an operation configured to establish the common property for the second virtual register since this operation is redundant and is no longer needed.