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path: root/lib/Transforms/Scalar/LoopUnswitch.cpp
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2007-01-12Implement review feedback for the ConstantBool->ConstantInt merge. ChrisReid Spencer
recommended that getBoolValue be replaced with getZExtValue and that get(bool) be replaced by get(const Type*, uint64_t). This implements those changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33110 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-11Rename BoolTy as Int1Ty. Patch by Sheng Zhou.Reid Spencer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33076 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-11For PR1043:Zhou Sheng
Merge ConstantIntegral and ConstantBool into ConstantInt. Remove ConstantIntegral and ConstantBool from LLVM. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33073 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-23For PR950:Reid Spencer
This patch removes the SetCC instructions and replaces them with the ICmp and FCmp instructions. The SetCondInst instruction has been removed and been replaced with ICmpInst and FCmpInst. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32751 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-19Switch over Transforms/Scalar to use the STATISTIC macro. For each statisticChris Lattner
converted, we lose a static initializer. This also allows GCC to emit warnings about unused statistics. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32690 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-06Detemplatize the Statistic class. The only type it is instantiated withChris Lattner
is 'unsigned'. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32279 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-26Removed #include <iostream> and replaced with llvm_* streams.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31923 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-02For PR786:Reid Spencer
Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting fall out by removing unused variables. Remaining warnings have to do with unused functions (I didn't want to delete code without review) and unused variables in generated code. Maintainers should clean up the remaining issues when they see them. All changes pass DejaGnu tests and Olden. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31380 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-28Eliminate ConstantBool::True and ConstantBool::False. Instead, provideChris Lattner
ConstantBool::getTrue() and ConstantBool::getFalse(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30665 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-29Do not rely on std::sort and std::erase to get list of uniqueDevang Patel
exit blocks. The output is dependent on addresses of basic block. Add and use Loop::getUniqueExitBlocks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29966 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-27eliminate RegisterOpt. It does the same thing as RegisterPass.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29925 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-19Fix a error that hadn't yet cause any problems, but I'm sure it would haveOwen Anderson
somewhere down the road. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29197 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-28Switch to a very conservative heuristic for determining when loop-unswitchingOwen Anderson
will be profitable. This is mainly to remove some cases where excessive unswitching would result in long compile times and/or huge generated code. Once someone comes up with a better heuristic that avoids these cases, this should be switched out. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28962 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-28Don't unswitch really large loops even if they are mostly filled with emptyChris Lattner
blocks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28959 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-27Fix for 2006-06-27-DeadSwitchCase.llOwen Anderson
Be more careful when updating Phi nodes after eliminating dead switch cases. Fix proposed by Chris. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28947 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-26Make LoopUnswitch able to unswitch loops with live-out values by taking ↵Owen Anderson
advantage of LCSSA. This results several times the number of unswitchings occurring on tests such and timberwolfmc, unix-tbl, and ldecod. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28912 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-14Fix Transforms/LoopUnswitch/2006-06-13-SingleEntryPHI.ll, a loop unswitchChris Lattner
bug exposed by the recent lcssa work. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28779 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-12Reapply my 6/9 changes. The bug Evan saw no longer occurs.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28759 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-11Back out Owen's 6/9 changes. They broke ↵Evan Cheng
MultiSource/Benchmarks/Prolangs-C/bison (and perhaps others). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28747 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-09Add LCSSA as a requirement for LoopUnswitch, and assert that LoopUnswitch ↵Owen Anderson
preserves LCSSA. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28739 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-24add the actual cost to the debug infoChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27051 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-22Fix Regression/Transforms/LoopUnswitch/2006-02-22-UnswitchCrash.ll, whichChris Lattner
caused SPASS to fail building last night. We can't trivially unswitch a loop if the exit block has phi nodes in it, because we don't know which predecessor to use. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26320 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-22Add some comments, simplify some code, and fix a bug that caused rewritingChris Lattner
to rewrite with the wrong value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26311 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-18improved support for branch folding, still not enabled.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26289 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-18Implement deletion of dead blocks, currently disabled.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26285 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-18a previous patch completely disabled trivial unswitching, this fixees it.Chris Lattner
Thanks to nate for pointing this out :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26280 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-18initial trivial support for folding branches that have now-constant ↵Chris Lattner
destinations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26279 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-18When unswitching a loop, make sure to update loop info with exit blocks inChris Lattner
the right loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26277 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-17Fix loops where the header has an exit, fixing a loop-unswitch crash on craftyChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26258 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-17start of some new simplification code, not thoroughly tested, use at your ownChris Lattner
risk :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26248 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-16Change SplitBlock to increment a BasicBlock::iterator, not an Instruction*. ↵Chris Lattner
Apparently they do different things :) This fixes a testcase that nate reduced from spass. Also included are a couple minor code changes that don't affect the generated code at all. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26235 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-16Fix VC++ warning.Jeff Cohen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26228 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-16fix a bug where we unswitched the wrong wayChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26225 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-15Implement trivial unswitching for switch stmts. This allows us to trivialChris Lattner
unswitch this loop on 2 before sweating to unswitch on 1/3. void test4(int N, int i, int C, int*P, int*Q) { int j; for (j = 0; j < N; ++j) { switch (C) { // general unswitching. default: P[i+j] = 0; break; case 1: Q[i+j] = 0; break; case 3: P[i+j] = Q[i+j]; break; case 2: break; // TRIVIAL UNSWITCH on C==2 } } } git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26223 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-15make "trivial" unswitching significantly more general. It can now handleChris Lattner
this for example: for (j = 0; j < N; ++j) { // trivial unswitch if (C) P[i+j] = 0; } turning it into the obvious code without bothering to duplicate an empty loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26220 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-15Checking the wrong value. This caused us to emit silly code likeChris Lattner
Y = seteq bool X, true instead of just using X :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26215 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-15more refactoring, no functionality change.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26194 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-15pull some code out into a functionChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26191 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-14Use statistics to keep track of what flavors of loops we are unswitchingChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26157 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-11implement unswitching of loops with switch stmts and selects in themChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26114 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-10Update PHI nodes in successors of exit blocks.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26113 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-10Reform the unswitching code in terms of edge splitting, not block splitting.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26112 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-10Fix a case where UnswitchTrivialCondition broke critical edges withChris Lattner
phi's in the successors git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26108 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-10add some notes, move some code around. Implement unswitching of loopsChris Lattner
with branches on partially invariant computations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26104 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-10Move code around to be more logical, no functionality change.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26103 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-10When unswitching a trivial loop, do admit we are doing it! :)Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26102 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-10Implement unconditional unswitching of 'trivial' loops, those loops that containChris Lattner
branches in their entry block that control whether or not the loop is a noop or not. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26101 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-09Simplify control flow a bit, note that unswitch preserves canonical loop formChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26098 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-09Make the threshold a parameterChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26093 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-09Simplify the loop-unswitch pass, by not even trying to unswitch loops withChris Lattner
uses of loop values outside the loop. We need loop-closed SSA form to do this right, or to use SSA rewriting if we really care. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26089 91177308-0d34-0410-b5e6-96231b3b80d8
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