Compiler Design Gate Smashers -

if (x > 0) y = 10; else y = 20;

To confidently solve any Compiler Design question within the time limit, follow this step-by-step preparation framework. Step 1: Establish Theory via Sequential Mapping compiler design gate smashers

Uses both synthesized and inherited attributes (with restrictions); evaluated depth-first, left-to-right. 4. Intermediate Code Generation (ICG) if (x > 0) y = 10; else

[ Source Code ] │ ▼ 1. Lexical Analyzer ──► (Token Stream) │ ▼ 2. Syntax Analyzer ──► (Parse Tree) │ ▼ 3. Semantic Analyzer ──► (Annotated Tree) │ ▼ 4. Intermediate Code ──► (Three-Address Code) │ ▼ 5. Code Optimizer ──► (Optimized IR) │ ▼ 6. Code Generator ──► [ Target Machine Code ] Intermediate Code Generation (ICG) [ Source Code ]

During the "Instruction Selection" phase of the compiler backend, the optimizer looks for these Phi nodes. If the architecture supports it, the compiler translates the Phi node into a conditional move or a bitwise-logic "Select" operation.

Computing operations on constant values ahead of time during compilation (e.g., replacing x = 3 + 5 with x = 8 ).