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Dead Code Elimination Code that is unreachable or that does not affect the program (e.g. dead stores) can be eliminated. Example: In the example below, the value assigned to i is never used, and the dead store can be eliminated. The first assignment to global is dead, and the third assignment to global is unreachable; both can be eliminated. int global; void f () { int i; i = 1; /* dead store */ global = 1; /* dead store */ global = 2; return; global = 3; /* unreachable */ } Below is the code fragment after dead code elimination. int global; void f () { global = 2; return; } © 1990-2012 Nullstone Corporation. All Rights Reserved.