LIVE VARIABLE ANALYSIS


LIVE VARIABLE ANALYSIS

Data-Flow Analysis
36 Live Variable Analysis * Variable x is live at a point p if on some path from p , x is used before it is redefined. * Useful in code generation: if x is not live on exit from a block
http://infolab.stanford.edu/~ullman/dragon/w06/lectures/dfa1.pdf

Garbage Collection and Local Variable Type-Precision and Liveness in ...
it will be performed for any dynamically loaded code before that code is executed. 10 Further below we report some mea-suresofthecostof the dataflow analysis. 7 Live variable analysis
http://www-plan.cs.colorado.edu/diwan/class-papers/javagc.pdf

Data-ow Analysis Animation-
Global live variable analysis is demonstrated on ava riable (%s) , followed by redundant coden n suppression for an ar bitrary expression from the flow graph. ", variable name) ;
http://www.netsoc.tcd.ie/~jgilbert/dfa_vivio/dfa.pdf

ELCOR Modules
Trimaran Tutorial 173 Data-flow analysis ? Live variable analysis - Live variable information is annotated on the IR Can also compute - Up exposed defined variables - Down exposed used
http://www.trimaran.org/docs/8_hp_elcor.pdf

The LimitsofAlias Analysis for Scalar Optimizations
The client analyses are Mod/Ref analysis, live variable analysis, reachingdenitions analysis, and interprocedural constant propagation. We corroborate their results, but we
http://www.cs.utexas.edu/users/shaikat/papers/alias-CC-04.pdf

Why Global Dataflow Analysis? Common Application sof Global Dataflow ...
Is a pointer to a local variable live one xitfroma Global Dataflow Analysis University of Ill inoisat Urbana-Cham paign Live Variables Live Variables Variable x is live at point p if x
http://www.cs.uiuc.edu/class/cs426/Notes-2005/10dataflow.4up.pdf

Path Analysis of the Relationships Between Various Body Measures and ...
Breast Length and Breast Circumference) were investigated via path analysis. Major purpose of this study was to determine the explanatory variable that is most effective on live
http://members.comu.edu.tr/akin/yayin/pala/Path%20Analysis%20REPRINT%202005.pdf

The LimitsofAlias Analysis for Scalar Optimizations
They use Mod/Ref analysis, live variable analysis, reaching definitions analysis, and interprocedural constant propagation. We corroborate their results, but we do so within the
http://www.dacapo-group.org/papers/alias-cc-2004.pdf

Pointer Analysis for Source-to-Source Transformations
This type of static analysis has been used in a variety of applications such as live variable analysis for register allocation and constant propagation, checking for potentialruntime
http://www1.cs.columbia.edu/~sedwards/papers/buss2005pointer.pdf

Assignment 12: register allocation
If you did not need to introduce any new temporaries, then register allocation is complete. Otherwise, you need togo back and do another iteration of live variable analysis, graph
http://ece.colorado.edu/~siek/ecen4553/fall07/hw12.pdf

On-the-fly Dynamic Dead Variable Analysis
The work in[10]focuses primarily on showing that live variable analysis defines an equivalence stronger thanbisimulation equivalence. Static live variable analysis comes at virtually
http://contentdm.lib.byu.edu/ETD/image/etd1791.pdf

Static Analysis
variable analysis (forward flow)-a definition is "avail" if it can affect computation at the current location - uninitialized variable indicates an error Live variable analysis
http://www.ics.uci.edu/~djr/classes/ics224/lectures/08-StaticAnalysis.pdf

Position Worklist Lattice Value exit
Write flow functions for Live Variable analysis: ? LV (?, [x := e]) = ? LV (?, /* any other */) = Question 2. Show how the worklist algorithm given in class operates on the program
http://www.cs.cmu.edu/~aldrich/courses/654/participation/Lect13.pdf

More Data Flow Analyses
to a use of the variable that does not re-define the variable. ?Live Variables Analysis-Determines which variables may be live at each program point 1/27/2005 4 Live Variable Analysis
http://www.cs.cmu.edu/~aldrich/courses/654-sp05/handouts/framework.pdf

Data Flow Analysis
Live Variable Analysis ?Definition ?A variable v is live at point p if the value of v is used along some path in the flow graph starting at p . ?Otherwise, the variable is dead .
http://www-2.cs.cmu.edu/afs/cs.cmu.edu/academic/class/15745-s03/public/lectures/L4_handouts.pdf

Interrupt Handlers in Dead Variable Analysis
the influence of the interrupt handler causes any global variable shared by the interrupt handler to be considered live until the end of the program. Anew dead variable analysis (DVA
http://vv.cs.byu.edu/publications/papers/tech-reports/smc-byu-0105.pdf

Introduction to Data-flow Analysis
2 CIS570 Lecture 4 Introduction to Data-flow Analysis 4 Liveness Analysis Definition-A variable is live at a particular point in the program if its value at that point will be used in
http://www.cis.upenn.edu/~cis570/slides/lecture04.pdf

Garbage Collection and Local Variable 'Qpe-Precision and Liveness in ...
One uses a type analysis to obtain a type-precise root set (only those variables that contain references); the other adds a live variable analysis to reduce the root set to only the
http://www.cs.umass.edu/~moss/papers/pldi-1998-liveness.pdf

lecture05-yetmoredataflow.ppt [Read-Only]
def-use chains u niversity of m assachusetts, a mherst ? d epartmentof c omputer s cience u niversity of m assachusetts, a mherst ? d epartmentof c omputer s cience live variable analysis
http://www.cs.umass.edu/%7Eemery/classes/cmpsci710-spring2004/lecture05-yetmoredataflow.pdf

CS502 Lecture 9: Introduction to Dataflow Analysis1
Live variable analysis leads to dead code elimination which removes instructions which do not aect the functionality of the program. the input of the program statement and RD out (l
http://www.cs.purdue.edu/homes/suresh/502-Fall2006/scribe/dataflow-analysis.pdf

Code Generation and Register Allocation
We have implemented the live variable analysis as part of the project, but we yet to implement an optimization that make use of the analysis. In this chapter, we will jump into
http://www.cs.purdue.edu/homes/suresh/502-Fall2006/scribe/regAlloc-intro.pdf

Load/Store Range Analysis for Global Register Allocation*
where each name is a set of connected statements. For example, Figure 1 shows a program with variable Xdefined in BO, B2 and B3, and used in B1, B4 andB5. Live range analysis reveals
http://www.cc.gatech.edu/aristotle/Publications/Papers/pldi93.pdf

Lecture 9: Dataflow COS 598C
COS 598C -Advanced Compilers Iterative Dataflow Analysis Framework Iterative Dataflow Analysis Framework Prof. David August COS 598C -Advanced Compilers Live Variable Analysis Live
http://www.cs.princeton.edu/courses/archive/spr04/cos598C/lectures/09-Dataflow.pdf

Lecture 17: Dataflow Analysis
Interference Graph Interference Graph Live Variable Application 2: Live Variable Application 2: Dead Code Elimination Dead Code Elimination Reaching Definition Analysis Reaching
http://www.cs.princeton.edu/courses/archive/spring07/cos320/lectures/17-DFAnalysis-2x2.pdf

Formulate the following program analysis problems as a monotone ...
Live variable analysis. 2. Constant Propagation: at each program point in a procedure, what variables always have single a constant value. 3. Pointeraliasing analysis: at each program
http://www.cs.utsa.edu/~qingyi/cs6463/slides/exer4.pdf

On-the-fly Dynamic Dead Variable Analysis
The work in[3]focuses primarily on showing that live variable analysis defines an equivalence stronger thanbisimulation. Static live variable analysis comes at virtually no cost
http://spinroot.com/spin/Workshops/ws07/Self.pdf

Introduction to Data-flow analysis
Better answer is found by considering the dynamic requirements of the program CS553 Lecture Introduction to Data-flow Analysis 4 Liveness Analysis Definition-A variable is live at a
http://www.cs.colostate.edu/%7emstrout/CS553Fall06/slides/lecture03-liveness.pdf

Outline Problem
1 CS 412 Introduction to Compilers Andrew Myers Cornell University Lecture 25: Live Variable Analysis 2 Apr 01 CS 412/413 Spring '01 --Andrew Myers Lecture 25 2 Administration
http://www.cs.cornell.edu/courses/cs412/2001sp/lectures/lec25.pdf

The Effectsofthe Precision of Pointer Analysis?
For example, how much benefit is gained by using a more precise pointer analysis as the first step in solving a dataflow problem such as live variable analysis?-Howgoodarethe"direct
http://www.cs.wisc.edu/wpis/papers/sas97.pdf