Source Code Generation Variable Assignment Optimization
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Solution Overview
Problem
Existing methods for generating source code from block diagrams often result in inefficient code due to the creation of unnecessary block variables and optimizations that can lead to increased memory consumption and execution time, particularly when dealing with multi-component variables.
Innovation Solution
A method that transforms a block diagram into an intermediate representation, optimizes it by identifying and replacing variable references in block pairs with equal value assignments, and removes assignments where both sides refer to the same variable, thereby reducing the number of variables and improving code efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a variable is overwritten by another variable with the same value in a block pair, then memory consumption and execution time are reduced, but side effects may occur if the overwritten variable is still needed by other blocks
Solution Approach 1:
The patent segments the block diagram into virtual and non-virtual blocks, and further segments variables into those that can be optimized and those that cannot. This segmentation allows selective optimization of variable assignments while preserving necessary variables that would cause side effects if overwritten, thus resolving the contradiction between memory reduction and avoiding side effects
Solution Approach 2:
The patent performs preliminary analysis during the transformation to intermediate representation to identify block pairs with equal value assignments and determine which variables can be safely overwritten. By pre-identifying safe optimization candidates before code generation, the method reduces memory consumption and execution time while avoiding unintended side effects
2Ease of manufacture
If multiple block variables are created for each block output, then code generation is simple, but code size increases and efficiency decreases
Solution Approach 1:
The patent merges variables from different blocks when they have equal values, particularly in block pairs where one block's output is assigned the same value as another block's output. This merging reduces the total number of variables and code size while maintaining correctness, directly addressing the contradiction between simple code generation and compact code size
Solution Approach 2:
The patent changes the parameter of variable identity by determining when variables from different blocks can be treated as the same variable (when they have equal values). This parameter change allows the code generator to produce more compact code without complex transformations, balancing simplicity with code size reduction
3Productivity
If optimization steps are applied sequentially to intermediate representation, then code efficiency improves, but the order of optimizations affects the extent of optimization and may miss certain opportunities
Solution Approach 1:
The patent performs preliminary identification of optimization opportunities during the transformation to intermediate representation, specifically identifying block pairs with equal value assignments before sequential optimization steps are applied. This preliminary action ensures that optimization opportunities are not missed regardless of the order of subsequent optimization steps, reducing sensitivity to optimization order while maintaining high code efficiency
Data Source
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AI summary
The invention relates to a method for generating source code from one or more blocks of a block diagram, which comprises at least two blocks and at least one signal connection between two blocks. Generating source code includes transforming the block diagram into an intermediate representation, successively optimizing the intermediate representation, and translating the optimized intermediate representation into source code. According to the invention, assignments with identical values are identified and minimized during the transformation process, so that they no longer need to be considered in subsequent optimization steps. Furthermore, the invention relates to a method for configuring a control unit, a computer program product, and a computer system.