Compiler Optimizations

• Inline expansion

  • Replaces calls to small run-time support functions with inline code, saving function call overhead

/* Expression Simplification*/

g = (a + b) - (c + d); /* unoptimized */

g = ((a + b) - c) - d; /* optimized */

• Expression simplification
  • Compiler simplifies expressions to equivalent forms requiring fewer instructions/registers

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