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Compiler Design · Intermediate Code Generation
Official IIT answer key · IISc Bangalore · Audited Aug 2026
GATE CSE 2016 Set 1 Q19 · NAT · 1 mark
x = u - t;
y = x * v;
x = y + w;
y = t - z;
y = x * y;
The minimum number of total variables required to convert the above code segment to static single assignment form is _________ .Key concept
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Topic notes
In GATE CS, Intermediate Code Generation (ICG) is tested through both theoretical/architectural concepts and precise algorithmic computations. Core recurring topics include Static Single Assignment (SSA) form variable counting and renaming, basic block partitioning via leader identification, register allocation on expression trees (Sethi-Ullman / Ershov labeling), array address calculation in 3-address code, and IR structures (Triples, AST, CFG, backpatching). The topic maintains an even split between 1-mark conceptual questions and 2-mark procedural NAT/MCQ problems.
Full Intermediate Code Generation guide →Consider the following code segment. x = u - t; y = x * v; x = y + w; y = t - z; y = x * y; The minimum number of total variables required to convert the above code segment to static single assignment form is …
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