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US09569185B2 Changing de-optimization guard representation during the compilation process 有权
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Changing de-optimization guard representation during the compilation process
Abstract:
A method for compiling code includes receiving a code section representation including a guard at a location, placing, at the guard, a triggering condition, and relocating the guard from the location to a second location in the code section representation. The method also includes transforming the guard into a control-split instruction. The control-split instruction includes a deoptimization branch and a continue execution branch. The method further includes placing, at the guard, a deoptimization instruction, and selecting a symbolic frame state linked to a side-effecting instruction. The side-effecting instruction is the last side-effecting instruction before the control-split instruction. The method also includes linking the deoptimization instruction with the symbolic frame state based on the symbolic frame state being linked to the side-effecting instruction, unlinking the symbolic frame state from the side-effecting instruction, and storing the code section representation.
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