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path: root/lib/Transforms/Scalar/IndVarSimplify.cpp
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2004-10-27Convert 'struct' to 'class' in various places to adhere to the coding standardsChris Lattner
and work better with VC++. Patch contributed by Morten Ofstad! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17281 91177308-0d34-0410-b5e6-96231b3b80d8
2004-10-12Fix a REALLY obscure bug in my previous checkin, which was splicing the ENDChris Lattner
marker from one ilist into the middle of another basic block! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16925 91177308-0d34-0410-b5e6-96231b3b80d8
2004-10-11Handle a common case more carefully. In particular, instead of transformingChris Lattner
pointer recurrences into expressions from this: %P_addr.0.i.0 = phi sbyte* [ getelementptr ([8 x sbyte]* %.str_1, int 0, int 0), %entry ], [ %inc.0.i, %no_exit.i ] %inc.0.i = getelementptr sbyte* %P_addr.0.i.0, int 1 ; <sbyte*> [#uses=2] into this: %inc.0.i = getelementptr sbyte* getelementptr ([8 x sbyte]* %.str_1, int 0, int 0), int %inc.0.i.rec Actually create something nice, like this: %inc.0.i = getelementptr [8 x sbyte]* %.str_1, int 0, int %inc.0.i.rec git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16924 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-20Prototype these functions more accuratelyChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16432 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-15Convert code to compile with vc7.1.Reid Spencer
Patch contributed by Paolo Invernizzi. Thanks Paolo! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16368 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-01Changes For Bug 352Reid Spencer
Move include/Config and include/Support into include/llvm/Config, include/llvm/ADT and include/llvm/Support. From here on out, all LLVM public header files must be under include/llvm/. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16137 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-26Throttle back indvar substitution from creating multiplies in loops. This ↵Chris Lattner
is bad bad bad. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15227 91177308-0d34-0410-b5e6-96231b3b80d8
2004-06-24Two fixes. First, stop using the ugly shouldSubstituteIndVar method.Chris Lattner
Second, disable substitution of quadratic addrec expressions to avoid putting multiplies in loops! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14358 91177308-0d34-0410-b5e6-96231b3b80d8
2004-06-20Make use of BinaryOperator::create* methods to shrinkify code.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14262 91177308-0d34-0410-b5e6-96231b3b80d8
2004-06-19Fix a nasty bug, noticed by ReidChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14249 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-23Move the scev expansion code into this pass, where it belongs. There isChris Lattner
still room for cleanup, but at least the code modification is out of the analysis now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13135 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-22Disable a previous patch that was causing indvars to loop infinitely :(Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13108 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-22Fix an extremely serious thinko I made in revision 1.60 of this file.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13106 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-21Implement a todo, rewriting all possible scev expressions inside of theChris Lattner
loop. This eliminates the extra add from the previous case, but it's not clear that this will be a performance win overall. Tommorows test results will tell. :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13103 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-21Implement a fixme. The helps loops that have induction variables of differentChris Lattner
types in them. Instead of creating an induction variable for all types, it creates a single induction variable and casts to the other sizes. This generates this code: no_exit: ; preds = %entry, %no_exit %indvar = phi uint [ %indvar.next, %no_exit ], [ 0, %entry ] ; <uint> [#uses=4] *** %j.0.0 = cast uint %indvar to short ; <short> [#uses=1] %indvar = cast uint %indvar to int ; <int> [#uses=1] %tmp.7 = getelementptr short* %P, uint %indvar ; <short*> [#uses=1] store short %j.0.0, short* %tmp.7 %inc.0 = add int %indvar, 1 ; <int> [#uses=2] %tmp.2 = setlt int %inc.0, %N ; <bool> [#uses=1] %indvar.next = add uint %indvar, 1 ; <uint> [#uses=1] br bool %tmp.2, label %no_exit, label %loopexit instead of: no_exit: ; preds = %entry, %no_exit %indvar = phi ushort [ %indvar.next, %no_exit ], [ 0, %entry ] ; <ushort> [#uses=2] *** %indvar = phi uint [ %indvar.next, %no_exit ], [ 0, %entry ] ; <uint> [#uses=3] %indvar = cast uint %indvar to int ; <int> [#uses=1] %indvar = cast ushort %indvar to short ; <short> [#uses=1] %tmp.7 = getelementptr short* %P, uint %indvar ; <short*> [#uses=1] store short %indvar, short* %tmp.7 %inc.0 = add int %indvar, 1 ; <int> [#uses=2] %tmp.2 = setlt int %inc.0, %N ; <bool> [#uses=1] %indvar.next = add uint %indvar, 1 *** %indvar.next = add ushort %indvar, 1 br bool %tmp.2, label %no_exit, label %loopexit This is an improvement in register pressure, but probably doesn't happen that often. The more important fix will be to get rid of the redundant add. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13101 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-18Change the ExitBlocks list from being explicitly contained in the LoopChris Lattner
structure to being dynamically computed on demand. This makes updating loop information MUCH easier. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13045 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-17If the loop executes a constant number of times, try a bit harder to replaceChris Lattner
exit values. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13018 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-17Even if there are not any induction variables in the loop, if we can computeChris Lattner
the trip count for the loop, insert one so that we can canonicalize the exit condition. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13015 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-16Fix some of the strange CBE-only failures that happened last night.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12980 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-15Fix a bug in the previous checkin: if the exit block is not the same asChris Lattner
the back-edge block, we must check the preincremented value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12968 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-15Change the canonical induction variable that we insert.Chris Lattner
Instead of producing code like this: Loop: X = phi 0, X2 ... X2 = X + 1 if (X != N-1) goto Loop We now generate code that looks like this: Loop: X = phi 0, X2 ... X2 = X + 1 if (X2 != N) goto Loop This has two big advantages: 1. The trip count of the loop is now explicit in the code, allowing the direct implementation of Loop::getTripCount() 2. This reduces register pressure in the loop, and allows X and X2 to be put into the same register. As a consequence of the second point, the code we generate for loops went from: .LBB2: # no_exit.1 ... mov %EDI, %ESI inc %EDI cmp %ESI, 2 mov %ESI, %EDI jne .LBB2 # PC rel: no_exit.1 To: .LBB2: # no_exit.1 ... inc %ESI cmp %ESI, 3 jne .LBB2 # PC rel: no_exit.1 ... which has two fewer moves, and uses one less register. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12961 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-02Rewrite the indvars pass to use the ScalarEvolution analysis.Chris Lattner
This also implements some new features for the indvars pass, including linear function test replacement, exit value substitution, and it works with a much more general class of induction variables and loops. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12620 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-08Improve encapsulation in the Loop and LoopInfo classes by eliminating theChris Lattner
getSubLoops/getTopLevelLoops methods, replacing them with iterator-based accessors. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10714 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-23More minor non-functional changes. This now computes the exit condition, thoughChris Lattner
it doesn't do anything with it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10590 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-22Don't mind me, I'm just refactoring away. This patch makes room for LFTR, butChris Lattner
contains no functionality changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10583 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-22Implement IndVarsSimplify/pointer-indvars.ll, transforming pointerChris Lattner
arithmetic into "array subscripts" git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10580 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-22Fix PR194Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10573 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-18Reverted back to previous revision - this was previously mergedJohn Criswell
according to the CVS log messages. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10517 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-18Merged in RELEASE_11.John Criswell
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10516 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-15Fix for PR185 & IndVarsSimplify/2003-12-15-Crash.llxChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10473 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-10Fix bug: IndVarsSimplify/2003-12-10-RemoveInstrCrash.llxChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10385 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-10Finegrainify namespacificationChris Lattner
Reorder #includes Implement: IndVarsSimplify/2003-12-10-IndVarDeadCode.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10376 91177308-0d34-0410-b5e6-96231b3b80d8
2003-11-11Put all LLVM code into the llvm namespace, as per bug 109.Brian Gaeke
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9903 91177308-0d34-0410-b5e6-96231b3b80d8
2003-10-20Added LLVM project notice to the top of every C++ source file.John Criswell
Header files will be on the way. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9298 91177308-0d34-0410-b5e6-96231b3b80d8
2003-10-12Rename loop preheaders pass to loop simplifyChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9061 91177308-0d34-0410-b5e6-96231b3b80d8
2003-10-10Fix spelling.Misha Brukman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9027 91177308-0d34-0410-b5e6-96231b3b80d8
2003-09-23Fix bug: IndVarsSimplify/2003-09-23-NotAtTop.llChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8689 91177308-0d34-0410-b5e6-96231b3b80d8
2003-09-12Make sure to cannonicalize loops before running indvar simplifyChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8502 91177308-0d34-0410-b5e6-96231b3b80d8
2003-09-10Spelling fixes. I think that "cannonical" is ok, but "canonical" appears toChris Lattner
be the canonical form for the word git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8430 91177308-0d34-0410-b5e6-96231b3b80d8
2003-09-10Fix up file headerChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8428 91177308-0d34-0410-b5e6-96231b3b80d8
2003-08-01DEBUG got moved to Support/Debug.hChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7492 91177308-0d34-0410-b5e6-96231b3b80d8
2003-04-23Remove unnecesary &*'sChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5872 91177308-0d34-0410-b5e6-96231b3b80d8
2002-10-21 - Rename AnalysisUsage::preservesAll to getPreservesAll & preservesCFG toChris Lattner
setPreservesCFG to be less confusing. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4255 91177308-0d34-0410-b5e6-96231b3b80d8
2002-10-01Updates to work with recent Statistic's changes:Chris Lattner
* Renamed StatisticReporter.h/cpp to Statistic.h/cpp * Broke constructor to take two const char * arguments instead of one, so that indendation can be taken care of automatically. * Sort the list by pass name when printing * Make sure to print all statistics as a group, instead of randomly when the statistics dtors are called. * Updated ProgrammersManual with new semantics. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4002 91177308-0d34-0410-b5e6-96231b3b80d8
2002-09-10Simplify code (somtimes dramatically), by using the new "auto-insert" featureChris Lattner
of instruction constructors. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3656 91177308-0d34-0410-b5e6-96231b3b80d8
2002-09-10* Clean up code a little bitChris Lattner
* Fix bug: test/Regression/Transforms/IndVarsSimplify/2002-09-09-PointerIndVar.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3644 91177308-0d34-0410-b5e6-96231b3b80d8
2002-08-08- Cleaned up the interface to AnalysisUsage to take analysis class namesChris Lattner
instead of ::ID's. - Pass::getAnalysis<> now no longer takes an optional argument git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3265 91177308-0d34-0410-b5e6-96231b3b80d8
2002-07-27* Standardize how analysis results/passes as printed with the print() virtualChris Lattner
methods * Eliminate AnalysisID: Now it is just a typedef for const PassInfo* * Simplify how AnalysisID's are initialized * Eliminate Analysis/Writer.cpp/.h: incorporate printing functionality into the analyses themselves. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3116 91177308-0d34-0410-b5e6-96231b3b80d8
2002-07-26* Add support for different "PassType's"Chris Lattner
* Add new RegisterOpt/RegisterAnalysis templates for registering passes that are to show up in opt or analyze * Register Analyses now * Change optimizations to use RegisterOpt instead of RegisterPass * Add support for different "PassType's" * Add new RegisterOpt/RegisterAnalysis templates for registering passes that are to show up in opt or analyze * Register Analyses now * Change optimizations to use RegisterOpt instead of RegisterPass * Remove getPassName implementations from various subclasses git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3113 91177308-0d34-0410-b5e6-96231b3b80d8
2002-07-23*** empty log message ***Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3016 91177308-0d34-0410-b5e6-96231b3b80d8
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-05-09 20:21:08 +0000