TOOLS AND TECHNIQUES FOR COMPILER DESIGN
MISCELLENOUS
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Can’t generate three address code
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Detailed explanation-1: -What are the types of three address code? The types of three address code are Assignment Statement(x = y op z and x = op y), While Statement, Switch Statement, Copy Statement, Unconditional Jump, Conditional Jump, Procedural call, Array Statement, and For Statement.
Detailed explanation-2: -Expert-Verified Answer A minimum number of temporary variable needed to swap the contents of 2 variable is 0. The swapping can easily be done without any other temporary variable with the above method or series.
Detailed explanation-3: -A variable is considered live if it is used in the block and not overwritten by any other variable. Rule of liveliness: If a block does not use a variable which is live after its exit point, then this variable is live also before the entry point of that block.