Dead code elimination - Wikipedia, the free encyclopedia
In compiler theory, dead code elimination is a compiler optimization that removes code that does not affect the program. Removing such code has two benefits: it shrinks program size, an important co...
en.wikipedia.org/wiki/Dead_code_elimination
Unreachable code - Wikipedia, the free encyclopedia
Unreachable code is a computer programming term for code in the source code of a program which can never be executed because there exists no control flow path to the code from the rest of the program...
en.wikipedia.org/wiki/Unreachable_code
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www.deadcodeelimination.com/ www.deadcodeelimination.com/
Besides being more powerful than the usual approaches to dead code elimination, this algorithm is optimal in the following sense: partially dead code remaining in the resulting program cannot be eliminated without changing the branching structure or the semantics of the program, or without impairing some program...
portal.acm.org/citation.cfm?id=178256
dead-code elimination--what are all the rules? Feb 21, 2008 1:14 AM ; ... What I want to know is what are all the criteria that hotspot can use to decide that code is dead. Code that is never executed ... Re: dead-code elimination--what are all the rules? Feb 26, 2008 11:05 AM (reply 1 of 1) (In reply to original post ) ;
forums.sun.com/thread.jspa?threadID=5266825
7.3.7 Dead-Code Elimination ... When the -scalaropt level is 1 or higher, KAP performs dead-code elimination. The following optimizations are performed: ... The full effect of dead-code elimination is realized when combined with other optimizations, such as subprogram inlining and forward substitution, which help in...
www.mun.ca/hpc/kapc/kapc_osf_ug0123.html
Correct compilers are a vital precondition to ensure software correctness. Optimizations are the most error-prone phases in compilers. ... Jan Olaf Blech, Lars Gesellensetter, Sabine Glesner, "Formal Verification of Dead Code Elimination in Isabelle/HOL," Software Engineering and Formal Methods,
www2.computer.org/portal/web/csdl/doi/10.1109/SEFM.2005... www2.computer.org/portal/web/csdl/doi/10.1109/SEFM.2005.20
CiteSeerX - Document Details (Isaac Councill, Lee Giles): A new aggressive algorithm for the elimination of partially dead code is presented, i.e., of code which is only dead on some program paths. ... Besides being more powerful than the usual approaches to dead code elimination, this algorithm is optimal in the...
citeseer.ist.psu.edu/knoop94partial.html
Program performance is always a concern, even in this era of high-performance hardware. ... The other subtle concern is dead-code elimination (DCE) (see Resources). In some circumstances, the compiler can determine that some code will never affect the output, and so the compiler will eliminate that code.
www.ibm.com/developerworks/java/library/j-benchmark1.ht... www.ibm.com/developerworks/java/library/j-benchmark1.html
Common code optimizations you'll have to do by hand in Java. ... Common subexpression elimination: If an expensive expression (for example, the result of a method call) is used more than once within a block of code, calculate it once and put it into a temporary variable for subsequent reuse.
www.cs.cmu.edu/~jch/java/compilers.html