X-Git-Url: https://svn.cri.ensmp.fr/git/pipstransfo.git/blobdiff_plain/625670968322617fed9df3a0ec370faa3185f167..bd0a0fff20a7047fda68c96e618ad5d64a88f065:/pipstransfo.tex diff --git a/pipstransfo.tex b/pipstransfo.tex index 4706900..454f0c5 100644 --- a/pipstransfo.tex +++ b/pipstransfo.tex @@ -16,12 +16,139 @@ \begin{document} +\chapter{Summary} + +\section{SGuelton} +\begin{itemize} +\item loop unrolling +\item inlining +\item forward substitution +\item loop fusion +\item loop tiling +\item reduction detection +\item parallelism detection +\item parallelism extraction +\item directive generation +\item constant propagation +\item instruction selection +\item goto elimination +\item outlining +\item common subexpression elimination +\item loop interchange +\item loop unszitching +\item statement isolation +\item dead code elimination +\item array linearization +\item privatization +\item loop normalization +\item iteration clamping +\item flatten code +\item strengh reduction +\item split update operator +\item n adress code generation +\item memory footprint reduction +\item redundant load-store elimination +\item invariant code motion +\item scalar renaming +\item loop rerolling +\end{itemize} + + +\section{Teraops} +\begin{itemize} +\item scalar renaming +\item scalar/array expansion +\item scalar/array privatization +\item scalarization +\item variable copying +\item index set splitting +\item loop peeling +\item loop unrolling +\item loop rerolling +\item full loop unrolling +\item idiom recognition +\item unswitching +\item loop fusion +\item loop fission/loop distribution +\item loop normalization +\item unimodular loop transformation/hyperplane method +\item loop interchange +\item loop reversal +\item loop skewing +\item non-unimodular loop transformation +\item strip-mining (loop sectionning) +\item loop coalescing/loop collapsing +\item loop tiling +\item loop parallelization +\item loop vectorization +\item loop invariant code motion +\item software pipelining +\item locality increazing +\item loop embedding/loop jamming +\item procedure inlining +\item procedure cloning +\item node splitting +\item forward expression substitution +\item induction variable substitution +\item if-conversion +\item statement reordering +\item expression optimization +\item partial redundancy 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} \section{Memory allocation alteration} +\begin{description} + +\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.} + +\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 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 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 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{Base blocs transformations} @@ -32,10 +159,7 @@ \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[inlining]{ is a function transformation. Inlining a function @@ -49,15 +173,9 @@ is the process of replacing a reference read in an expression by the latest expression affected to it.} -\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[reduction detection]{ is an analysis that identifies statements that perform a reduction over a @@ -91,12 +209,7 @@ is the process of replacing similar expressions by a variable that holds the result of their evaluation.} -\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[statement isolation]{is the process of replacing all variables referenced in a statement by newly declared variables. A @@ -112,11 +225,6 @@ multidimensional array into unidimensional arrays, possibly with a conversion from array to pointer.} -\item[privatization]{is the process of detecting variables that - are private to a loop body, i.e.\ written first, then read.} - -\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[iteration clamping]{is a loop transformation that extends the loop range but guards the loop body with the former range.} @@ -150,4 +258,8 @@ them by their non-unrolled version.} \end{description} + +\section{References} + + \end{document}