X-Git-Url: https://scm.cri.mines-paristech.fr/git/pipstransfo.git/blobdiff_plain/db4f136a6b8be6ff148b0b27863c8504e14cd2a7..63511b98711a3c3da5dbecfc28303882221b100e:/pipstransfo.tex?ds=inline diff --git a/pipstransfo.tex b/pipstransfo.tex index 3c0e935..60b8709 100644 --- a/pipstransfo.tex +++ b/pipstransfo.tex @@ -7,19 +7,79 @@ \usepackage{listings} \usepackage{hyperref} +\usepackage{xspace} + +\usepackage{makeidx} + +\usepackage{etoolbox} + +\newcommand{\PIPS}{PIPS\xspace} + +% Patch the sectioning commands to provide a hook to be used later +\preto{\chapter}{\def\leveltitle{\chaptertitle}} +\preto{\section}{\def\leveltitle{\sectiontitle}} +\preto{\subsection}{\def\leveltitle{\subsectiontitle}} +\preto{\subsubsection}{\def\leveltitle{\subsubsectiontitle}} + +\makeatletter +% \@sect is called with normal sectioning commands +% Argument #8 to \@sect is the title +% Thus \section{Title} will do \gdef\sectiontitle{Title} +\pretocmd{\@sect} + {\expandafter\gdef\leveltitle{#8}} + {}{} +% \@ssect is called with *-sectioning commands +% Argument #5 to \@ssect is the title +\pretocmd{\@ssect} + {\expandafter\gdef\leveltitle{#5}} + {}{} +% \@chapter is called by \chapter (without *) +% Argument #2 to \@chapter is the title +\pretocmd{\@chapter} + {\expandafter\gdef\leveltitle{#2}} + {}{} +% \@schapter is called with \chapter* +% Argument #1 to \@schapter is the title +\pretocmd{\@schapter} + {\expandafter\gdef\leveltitle{#1}} + {}{} +\makeatother + +\newcommand{\PIPSPass}{Pass Name in \PIPS : } +\newcommand{\PIPSExamples}{Validation folder in \PIPS : } +\newcommand{\BookRef}{Reference: } +\newcommand{\NameCommun}[1]{\subsection{#1}\index{\sectiontitle!\subsectiontitle}} +\newcommand{\NamePipsPass}[1]{\xspace#1\index{\sectiontitle!\subsectiontitle!#1}\xspace} + + +\title{\PIPS~--- List of code transformations} + +\makeindex +\begin{document} -\title{PIPS~--- List of code transformations} +\chapter{Summary} +\section{Section Name} +\NameCommun{Commun Transformation Name} +Description... -\begin{document} +\PIPSPass \NamePipsPass{toto}, \NamePipsPass{toto2}, \NamePipsPass{toto3} +\PIPSExamples toto -\chapter{Summary} +\BookRef \cite[p. xxx]{darte_scheduling_2000}, +\cite[p. xxx]{wolfe_high_1996}, +\cite[p. xxx]{zima_supercompilers_1990}, +\cite[p. xxx]{dowd_high_1998}, +\cite[p. xxx]{aho_compilers_2007}, +\cite[p. xxx]{allen_optimizing_2001} \section{SGuelton} + \begin{itemize} + % memory allocation alteration \item scalar renaming % loop transformations @@ -33,7 +93,7 @@ \item inlining % basic bloc transformations \item forward substitution -% dead code removal +% dead code elimination \item constant propagation \item dead code elimination @@ -58,222 +118,164 @@ \item split update operator \item statement isolation \item strengh reduction -\end{itemize} +\end{itemize} \section{Teraops} + \begin{itemize} + % memory allocation alteration \item scalar renaming \item scalar/array expansion \item scalar/array privatization -\item scalarization -\item variable copying +\item scalarization % according to .pdf, not supported by Pips +\item variable copying % not supported by Pips % loop transformations -\item index set splitting -\item loop peeling +\item index set splitting % not supported by Pips +\item loop peeling % not supported by Pips \item loop unrolling -\item loop rerolling +\item loop rerolling % not supported by Pips \item full loop unrolling \item idiom recognition -\item unswitching -\item loop fusion +\item unswitching % not supported by Pips +\item loop fusion % not supported by Pips \item loop fission/loop distribution \item loop normalization \item unimodular loop transformation/hyperplane method \item loop interchange -\item loop reversal +\item loop reversal % not supported by Pips \item loop skewing \item non-unimodular loop transformation \item strip-mining (loop sectionning) -\item loop coalescing/loop collapsing +\item loop coalescing/loop collapsing % not supported by Pips \item loop tiling \item loop parallelization -\item loop vectorization +\item loop vectorization % not supported by Pips \item loop invariant code motion -\item software pipelining +\item software pipelining % not supported by Pips \item locality increazing -% inter procedural transformations -\item loop embedding/loop jamming -\item procedure inlining +% interprocedural transformations +\item loop embedding/loop jamming % not supported by Pips +\item procedure inlining % not supported by Pips \item procedure cloning % basic bloc transformations \item node splitting \item forward expression substitution -\item induction variable substitution +\item induction variable substitution % not supported by Pips \item if-conversion -\item statement reordering +\item statement reordering % not supported by Pips \item expression optimization \item partial redundancy elimination -% dead code removal +% dead code elimination \item unreachable code \item semantically uneachable code \item if and loop elimination \item use-def elimination \item constant propagation + \end{itemize} -\chapter{List of PIPS transformations} +\chapter{List of \PIPS transformations} \section{Memory allocation alteration} \begin{description} -\item[scalar renaming]{is the process of renaming scalar variables to - suppress false data dependencies.} +\item[scalar renaming]{is the process of renaming scalar variables to suppress false data dependencies.} -\item[privatization]{is the process of detecting variables that are - private to a loop body, i.e.\ written first, then read.} +\item[privatization]{is the process of detecting variables that are private to a loop body, i.e.\ written first, then read.} \end{description} - \section{Loop transformations} \begin{description} -\item[loop unrolling]{ - is a loop transformation. - Unrolling a loop by a factor of $n$ consists in the substitution of a loop - body by itself, replicated $n$ times. A prelude and/or postlude are - added to preserve the number of iteration.} +\item[loop unrolling]{is a loop transformation. +Unrolling a loop by a factor of \(n\) consists in the substitution of a loop body by itself, replicated \(n\) times. +A prelude and/or postlude are added to preserve the number of iteration.} -\item[loop fusion]{ - is a loop transformation that replaces two loops by a single loops whose - body is the concatenation of the bodies of the two initial loops.} +\item[loop fusion]{is a loop transformation that replaces two loops by a single loops whose body is the concatenation of the bodies of the two initial loops.} -\item[loop tiling]{ - is a loop nest transformation that changes the loop execution order - through a partitions of the iteration space into - chunks, so that the iteration is performed over each chunk and in the - chunks.} +\item[loop tiling]{is a loop nest transformation that changes the loop execution order through a partitions of the iteration space into chunks, so that the iteration is performed over each chunk and in the chunks.} -\item[loop interchange]{is a loop transformation that permutes two - loops from a loop nest.} +\item[loop interchange]{is a loop transformation that permutes two loops from a loop nest.} -\item[loop unswitching]{is a loop transformation that replaces a - loop containing a test independent from the loop execution by a test - containing the loop without the test in both true and false branch.} +\item[loop unswitching]{is a loop transformation that replaces a loop containing a test independent from the loop execution by a test containing the loop without the test in both true and false branch.} -\item[loop normalization]{is a loop transformation that changes - the loop initial increment value or the loop range to enforce certain values, - generally~1.} +\item[loop normalization]{is a loop transformation that changes the loop initial increment value or the loop range to enforce certain values, generally~1.} \end{description} -\section{Inter-procedural transformations} +\section{Interprocedural transformations} \section{Base blocs transformations} -\section{Dead code removal} - - - +\section{Dead code elimination} \begin{description} +\item[dead code elimination]{is the process of pruning from a function all the statements whose results are never used.} -\item[inlining]{ - is a function transformation. Inlining a function - \texttt{foo} in its caller \texttt{bar} consists in the substitution - of the calls to \texttt{foo} in \texttt{bar} by the function body - after replacement of the formal parameters by their effective - parameters. -} - -\item[forward substitution]{ - is the process of replacing a reference read in an - expression by the latest expression affected to it.} - +\item[common subexpression elimination]{is the process of replacing similar expressions by a variable that holds the result of their evaluation.} +\item[goto elimination]{is the process of replacing \texttt{goto} instructions by a hierarchical control flow graph.} +\end{description} +\section{Other (unclassified)} -\item[reduction detection]{ - is an analysis that identifies statements that perform a reduction over a - variable.} - -\item[parallelism detection]{ - is a common name for analysis that detect if a loop can be run in parallel.} - -\item[parallelism extraction]{ - is a common name for code transformations that modifies loop nest to make it legal to - run them in parallel.} - -\item[directive generation]{ - is a common name for code transformations that annotate the code with directives.} +\begin{description} -\item[constant propagation]{ - is a pass that replaces a variable by its value when this value is - known at compile time.} +\item[inlining]{is a function transformation. +Inlining a function \texttt{foo} in its caller \texttt{bar} consists in the substitution of the calls to \texttt{foo} in \texttt{bar} by the function body after replacement of the formal parameters by their effective parameters.} -\item[instruction selection]{ - is the process of mapping parts of the IR to machine instructions.} +\item[forward substitution]{is the process of replacing a reference read in an expression by the latest expression affected to it.} -\item[goto elimination]{ - is the process of replacing \texttt{goto} instructions by a hierarchical control flow - graph.} -\item[outlining]{ - is the process of extracting part of a function body into a new function - and replacing it in the initial function by a function call.} +\item[reduction detection]{is an analysis that identifies statements that perform a reduction over a variable.} -\item[common subexpression elimination]{ - is the process of replacing similar expressions by a variable that holds - the result of their evaluation.} +\item[parallelism detection]{is a common name for analysis that detect if a loop can be run in parallel.} +\item[parallelism extraction]{is a common name for code transformations that modifies loop nest to make it legal to run them in parallel.} +\item[directive generation]{is a common name for code transformations that annotate the code with directives.} -\item[statement isolation]{is the process of replacing all - variables referenced in a statement by newly declared variables. A - prologue - and an epilogue are added to copy old variable values to new variable, back - and forth.} +\item[constant propagation]{is a pass that replaces a variable by its value when this value is known at compile time.} -\item[dead code elimination]{is the process of pruning from a - function all the statements whose results are - never used.} +\item[instruction selection]{is the process of mapping parts of the IR to machine instructions.} -\item[array linearization]{is the process of converting - multidimensional array into unidimensional arrays, possibly with a - conversion from array to pointer.} +\item[outlining]{is the process of extracting part of a function body into a new function and replacing it in the initial function by a function call.} +\item[statement isolation]{is the process of replacing all variables referenced in a statement by newly declared variables. +A prologue and an epilogue are added to copy old variable values to new variable, back and forth.} -\item[iteration clamping]{is a loop transformation that extends - the loop range but guards the loop body with the former range.} +\item[array linearization]{is the process of converting multidimensional array into unidimensional arrays, possibly with a conversion from array to pointer.} -\item[flatten code]{is the process of pruning a function body from - declaration blocks so that all declarations are made at the top level.} +\item[iteration clamping]{is a loop transformation that extends the loop range but guards the loop body with the former range.} -\item[strength reduction]{is the process of replacing an operation - by an operation of lower cost.} +\item[flatten code]{is the process of pruning a function body from declaration blocks so that all declarations are made at the top level.} -\item[split update operator]{is the process of replacing an update - operator by its expanded form.} +\item[strength reduction]{is the process of replacing an operation by an operation of lower cost.} -\item[n address code generation]{is the process of splitting - complex expression in simpler ones that take at most $n$ operands.} +\item[split update operator]{is the process of replacing an update operator by its expanded form.} -\item[memory footprint reduction]{is the process of tiling a loop - to make sure the iteration over the tile has a memory footprint bounded by - a given value.} +\item[n address code generation]{is the process of splitting complex expression in simpler ones that take at most \(n\) operands.} -\item[redundant load-store elimination]{is an inter procedural transformation - that optimizes data transfers by delaying and merging them.} +\item[memory footprint reduction]{is the process of tiling a loop to make sure the iteration over the tile has a memory footprint bounded by a given value.} -\item[invariant code motion]{is a loop transformation that moves outside - of the loop - the code from its body that is independent from the iteration.} +\item[redundant load-store elimination]{is an inter procedural transformation that optimizes data transfers by delaying and merging them.} +\item[invariant code motion]{is a loop transformation that moves outside of the loop the code from its body that is independent from the iteration.} +\item[loop rerolling]{finds manually unrolled loop and replace them by their non-unrolled version.} -\item[loop rerolling]{finds manually unrolled loop and replace - them by their non-unrolled version.} \end{description} - \nocite{*} \bibliographystyle{alpha} -\bibliography{refs} +\bibliography{\jobname} +\printindex \end{document}