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| | Compiler optimization - Wikipedia, the free encyclopedia |
 | | Compiler optimization techniques are optimization techniques that have been programmed into a compiler. | | | The existence of interprocedural analysis and optimization is common in modern commercial compilers from SGI, Intel, Microsoft, and Sun. | | | As opposed to compilers which optimize intermediate representations of programs, post pass optimizers work on the assembly language level. |
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http://en.wikipedia.org/wiki/Compiler_optimization
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| | Compiler |
| | A compiler is a computer program that translates a computer program written in one computer language (called the source language) into an equivalent program written in another computer language (called the output or the target language). | | | Most compilers translate source code written in a high level language to object code or machine language that may be directly executed by a computer or a virtual machine. | | | Compiler Analysis - This is the process to gather program information from the intermediate representation of the input source files. |
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http://hallencyclopedia.com/Compiler
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| | [No title] |
| | Compilers can also allow the user to decide which specific optimizations to use, giving users the flexibility to disregard optimization options that may not be useful on their current project. | | | Compilers are tools that convert programmers' code into a language that the computer can understand. | | | Implementing optimizations so that they are always used will result in more software products compiled with optimizations. |
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http://www.cs.virginia.edu/~skadron/Papers/miranda_thesis.doc
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| | IBM Compiler Optimization Flags: -On |
| | Some optimizations may be done that will change the semantics of the program slightly, and might cause numeric differences between the results of the program and the same program compiled at the -O2 optimization level or with no optimization. | | | With -O2 optimization, the compiler would recognize that there is no need to store the value of x until the loop is completed, and intermediate values would be kept in registers. | | | -O5 The -O5 level of optimization peforms all of the optimizations done at the -O4 as well as the optimization specified by -qipa=level=2 which is described below. |
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http://www.nersc.gov/nusers/resources/software/ibm/opt_options/on.php
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| | freshmeat.net: Editorials - Optimization |
| | Attempting to optimize a program that doesn't even run is a pointless task. | | | The bulk of the optimization time is spent analyzing the code& data flow structure and selecting from so many orthogonal optimization possibilities. | | | Compilers can't be optimal for every procedure in every context but that is likely the last place for the problem to be. |
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http://freshmeat.net/articles/view/186
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| | Code Optimization Using the GNU C Compiler LG #71 |
| | If the compiler is an optimizing compiler, one of these stages "optimizes" the machine language code so that it either takes less time to run or occupies less memory or sometimes both. | | | From these optimization techniques and the various pieces of information that are required to apply them, the reader can appreciate the type of sophisticated and complex analysis that the compiler must carry out on the program. | | | A complete list of the optimization techniques that are used by the GNU C compiler is available at http://www.redhat.com/products/support/gnupro/gnupro_gcc.html. |
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http://www.tldp.org/LDP/LG/issue71/joshi.html
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| | University of Alberta CMPUT680 |
| | Although compiler design and optimization is a research discipline on its own right, understanding compiler optimization is very important for architecture and system research. | | | Such optimizations are often language independent and explore the relationship between compiler optimization and architecture and system design. | | | Study classical compiler optimizations and the trade-offs between hardware assisted and compiler assisted instruction level parallelism. |
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http://www.cs.ualberta.ca/~amaral/courses/680
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| | TechOnLine - Advanced Compiler Optimization Techniques |
| | With a compiler's optimization capability affecting so many aspects of product development, it is more important than ever to understand and evaluate a compiler's optimization technology. | | | A good example of an optimization that reimplements structured programs for higher performance is the complex branch optimization. | | | Today, a highly optimizing compiler enables developers to write the most readable and maintainable source code with the confidence that the compiler can generate the optimal binary implementation. |
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http://www.techonline.com/community/related_content/20437
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| | Java Forums - Compiler Optimization |
| | compiles into bytecodes that execute literally, meaning 10 is pushed on the stack, stored in local var 0, etc. A good C compiler would optimize this code (assuming x and y are not used elsewhere in the method) to simply store 30 in local var z. | | | I have been told that the compiler does not optimize such code because then the JIT compiler can most efficiently optimize depending on the hardware platform. | | | In this second case the compiler is right not to optimize the code. |
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http://forum.java.sun.com/thread.jspa?threadID=558077&tstart=135
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| | Compiler Optimization |
| | Optimizing for space can actually be faster than optimizing for speed because programs optimized for speed are almost always larger, and therefore more likely to cause additional paging than programs optimized for space. | | | There are also some optimizations that you might not choose to use for your specific application. | | | Alternate methods are given when an optimization can be specified directly in the code. |
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http://www.tantalon.com/pete/cppopt/compiler.htm
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| | [No title] |
| | Most programs and libraries by default are compiled with optimizing level 2 (gcc options -g and -O2) and are compiled for a specific CPU. | | | If you don't wish to run software on other machines other than your own, you might want to change the default compiler options so that they will be compiled with a higher optimization level, and generate code for your specific architecture. | | | Bad memory can cause compilation problems when a high level of optimization is used, like the -O3 setting. |
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http://www.linuxfromscratch.org/hints/downloads/files/optimization.txt
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| | Compilers Algorithms |
| | Instructions are optimized only considering the instructions in the peephole. | | | Various kinds of optimization and global analysis are done by compilers, but in the absence of application knowledge, it is hard to bound their runtime. | | | Almost all open-source software is built with GCC, a compiler that converts a program's source code--the commands written by humans in high-level languages such as C--into the binary instructions a computer understands. |
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http://www.softpanorama.org/Algorithms/compilers.shtml
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| | Compiler Consulting Resources |
| | The generators can also be applied to create compiler front-ends and other tools requiring semantic analysis of a language. | | | Expertise with Front-Ends, Code Generators and Optimizers, Assemblers and Linkers, Debuggers and Target Resident Debug Monitors and Run-Time Libraries and RTOS integration. | | | Simulate double-precision FP in software; improve optimization and fix numerous bugs in existing compiler and runtime. |
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http://www.compilerconnection.com/consultants/consultants.htm
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| | Code optimization - compiler |
| | Programs used as performance tests, and perform no 'real' computations, should be written to avoid being 'completely optimized out', writing the 'results' to screen/file may be enough to fool the compiler. | | | Thanks to Timothy Prince for the note on architectures with Instruction Level Parallelism) Optimization techniques used by compilers may inspire good and efficient programming practices and are interesting in their own right. | | | Before trying to perform 'hand optimization' please note the following points: 1) Remember that the compiler perform such optimizations anyway, so the benefit of doing them manually may be small or negative!. |
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http://www.ibiblio.org/pub/languages/fortran/ch1-10.html
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| | Java Compilers |
| | You can also use shifts instead of multiplication by powers of two, multiplication instead of exponentiation, etc, although mathematical optimizations of this type generally have little benefit unless you're using a just-in-time compiler. | | | DashO will now do most of these missing optimizations for you. | | | in Linpack for an example of this optimization -- it saves you an |
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http://www.cs.cmu.edu/~jch/java/compilers.html
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| | UW-Madison CS Dept : Summer'97 Discussion Group for Compiler Optimization |
| | The topic of the discussions was compiler optimizations (mainly for instruction-level parallelism). | | | An MIT reading group on compiler optimizations (a Harvard section as well). | | | An informal series of discussions was held during the summer of '97 at the Computer Sciences Department, University of Wisconsin-Madison. |
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http://www.cs.wisc.edu/~plakal/pl/summer97
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| | EPIC Advisory Board |
| | Her main areas of research have been compiler optimization, algorithm analysis and design, and scheduling theory. | | | In 1992, she joined IBM's Applications Development Technology Institute as a Senior Programmer and subsequently served as Senior Technology Advisor for IBM Global Services. | | | Her work on clock synchronization won an IBM Research Division Award. |
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http://www.epic.org/epic/advisory_board.html
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| | CS5131 - Compiler Optimization |
| | analyze compiler research on optimization by detailing the function, strength and weaknesses of the new methods contained in research papers | | | build a machine-independent optimizer including control-flow analysis, data-flow analysis, dependence testing, loop transformations, and optimizations | | | Objectives: In undergraduate compiler courses, students are often taught how to build a bad compiler for a small language. |
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http://www.csl.mtu.edu/cs5131/www/Syllabus.html
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