\usepackage{hyperref}
\usepackage{xspace}
-\def\PIPS{PIPS\xspace}
-
+\newcommand\PIPS{PIPS\xspace}
\title{\PIPS~--- List of code transformations}
-
-
\begin{document}
-
\chapter{Summary}
\section{SGuelton}
+
\begin{itemize}
+
% memory allocation alteration
\item scalar renaming
% loop transformations
\item inlining
% basic bloc transformations
\item forward substitution
-% dead code removal
+% dead code elimination
\item constant propagation
\item dead code elimination
\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}
\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}
-\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.}
+\section{Other (unclassified)}
-\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}
\end{document}
projects / pipstransfo.git / blobdiff