Basic Blocks and Flow Graphs | Code Optimization | Compiler Design
#BasicBlocksandFlowGraphs
basic block example || loops in flow graph || global data flow analysis || algorithm to generate basic blocks and flow graph || basic blocks and flow graphs || partition three adress code to basic blocks || flow graphs || leader finding algorithm || compiler design
A Basic Block is a straight line code sequence with no branches except at the entry and end. It is a set of statements that execute one after another. The first task is to partition a sequence of three-address codes into basic blocks. Instructions are added until a jump or label is met, and control moves further consecutively from one instruction to another. The algorithm standardized this idea:
Input: A sequence of three address instructions. Process: Instructions from intermediate code are determined as leaders. The first three-address instruction of the intermediate code is a leader, and instructions that target unconditional or conditional jump/goto statements are leaders. Each leader's basic block contains itself and all instructions up to excluding the next leader.
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