aboutsummaryrefslogtreecommitdiff
path: root/lib/Transforms/Scalar/IndVarSimplify.cpp
AgeCommit message (Collapse)Author
2009-02-17Fix 80-column violation.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64766 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-17Simplify; fix some 80-column violations.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64702 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-16Delete this long-commented-out code. The situation it seems to haveDan Gohman
been written for is no longer relevant with the elimination of signed and unsigned types. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64625 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-14Extend the IndVarSimplify support for promoting induction variables:Dan Gohman
- Test for signed and unsigned wrapping conditions, instead of just testing for non-negative induction ranges. - Handle loops with GT comparisons, in addition to LT comparisons. - Support more cases of induction variables that don't start at 0. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64532 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-14Clarify debug output.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64531 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-14Simplify some code. hasComputableLoopEvolution is overkill in this case.Dan Gohman
No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64530 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-12Teach IndVarSimplify to optimize code using the C "int" type forDan Gohman
loop induction on LP64 targets. When the induction variable is used in addressing, IndVars now is usually able to inserst a 64-bit induction variable and eliminates the sign-extending cast. This is also useful for code using C "short" types for induction variables on targets with 32-bit addressing. Inserting a wider induction variable is easy; the tricky part is determining when trunc(sext(i)) expressions are no-ops. This requires range analysis of the loop trip count. A common case is when the original loop iteration starts at 0 and exits when the induction variable is signed-less-than a fixed value; this case is now handled. This replaces IndVarSimplify's OptimizeCanonicalIVType. It was doing the same optimization, but it was limited to loops with constant trip counts, because it was running after the loop rewrite, and the information about the original induction variable is lost by that point. Rename ScalarEvolution's executesAtLeastOnce to isLoopGuardedByCond, generalize it to be able to test for ICMP_NE conditions, and move it to be a public function so that IndVars can use it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64407 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26Revert r60042. IndVarSimplify should check if APFloat is PPCDoubleDouble ↵Evan Cheng
first before trying to convert it to an integer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60072 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-18Cast to remove warning about comparing signed and unsigned.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59518 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-18Give SIToFPInst preference over UIToFPInst because it is faster on platforms ↵Devang Patel
that are widely used. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59476 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-17While handling floating point IVs lift restrictions on initial value and ↵Devang Patel
increment value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59471 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-17Handle floating point ivs during doInitialization().Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59466 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-16eliminate some std::set's.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59409 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-03Turn floating point IVs into integer IVs where possible.Devang Patel
This allows SCEV users to effectively calculate trip count. LSR later on transforms back integer IVs to floating point IVs later on to avoid int-to-float casts inside the loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58625 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-22Change create*Pass factory functions to return Pass* instead ofDaniel Dunbar
LoopPass*. - Although less precise, this means they can be used in clients without RTTI (who would otherwise need to include LoopPass.h, which eventually includes things using dynamic_cast). This was the simplest solution that presented itself, but I am happy to use a better one if available. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58010 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-10fix white spaces.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56056 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-09if loop induction variable is always sign or zero extended then Devang Patel
extend the type of induction variable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56017 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-05Remove unused map.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55861 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-04Tidy up several unbeseeming casts from pointer to intptr_t.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55779 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-05Pass the computed iteration count value to RewriteLoopExitValuesDan Gohman
instead of having it call getIterationCount again. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54380 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-22Use Loop::block_iterator.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52616 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-13Use recently added getTruncateOrZeroExtend method to make the code shorter.Wojciech Matyjewicz
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52251 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-23Tidy up BasicBlock::getFirstNonPHI, and change a bunch of places toDan Gohman
use it instead of duplicating its functionality. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51499 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-16API change for {BinaryOperator|CmpInst|CastInst}::create*() --> Create. ↵Gabor Greif
Legacy interfaces will be in place for some time. (Merge from use-diet branch.) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51200 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-13Clean up the use of static and anonymous namespaces. This turned upDan Gohman
several things that were neither in an anonymous namespace nor static but not intended to be global. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51017 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-06API changes for class Use size reduction, wave 1.Gabor Greif
Specifically, introduction of XXX::Create methods for Users that have a potentially variable number of Uses. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49277 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-29Remove attribution from file headers, per discussion on llvmdev.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45418 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-22Move the SCEV object factors from being static members of the individualDan Gohman
SCEV subclasses to being non-static member functions of the ScalarEvolution class. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43224 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-10Require SCEV before LCSSA.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41798 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-04Update GEP constructors to use an iterator interface to fixDavid Greene
GLIBCXX_DEBUG issues. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41697 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-21Use SmallVector instead of std::vector.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41207 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-27Fix a bug.Zhou Sheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37751 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-19Rename ScalarEvolution::deleteInstructionFromRecords toDan Gohman
deleteValueFromRecords and loosen the types to all it to accept Value* instead of just Instruction*, since this is what ScalarEvolution uses internally anyway. This allows more flexibility for future uses. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37657 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-15Use SCEVConstant::get instead of SCEVUnknown::get to create anDan Gohman
integer constant SCEV. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37596 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-15Add a SCEV class and supporting code for sign-extend expressions.Dan Gohman
This created an ambiguity for expandInTy to decide when to use sign-extension or zero-extension, but it turns out that most of its callers don't actually need a type conversion, now that LLVM types don't have explicit signedness. Drop expandInTy in favor of plain expand, and change the few places that actually need a type conversion to do it themselves. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37591 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-06Inform ScalarEvolutions that we're deleting Values.Nick Lewycky
This is the obviously correct part of the fix for PR1487. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37457 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-06Fix typo in comment.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36873 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-03Drop 'const'Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36662 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-02Use 'static const char' instead of 'static const int'.Devang Patel
Due to darwin gcc bug, one version of darwin linker coalesces static const int, which defauts PassID based pass identification. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36652 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-01Do not use typeinfo to identify pass in pass manager.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36632 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-07Now IndVarSimplify is a LoopPass.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35003 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-04make better use of LCSSA information in RewriteLoopExitValues. Before, weChris Lattner
would scan the entire loop body, then scan all users of instructions in the loop, looking for users outside the loop. Now, since we know that the loop is in LCSSA form, we know that any users outside the loop will be LCSSA phi nodes. Just scan them. This speeds up indvars significantly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34898 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-04Implement PR1179/PR1232 and ↵Chris Lattner
test/Transforms/IndVarsSimplify/loop_evaluate_[234].ll This makes -indvars require and use LCSSA, updating it as appropriate. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34896 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-03Make RewriteLoopExitValues far less nested by using continue in the loopChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34891 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-02Prefer non-virtual calls to ConstantInt::isZero over virtual calls toReid Spencer
Constant::isNullValue() in situations where it is possible. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34821 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-11Simplify code by using value::takenameChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34176 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-05Apply the VISIBILITY_HIDDEN field to the remaining anonymous classes inReid Spencer
the Transforms library. This reduces debug library size by 132 KB, debug binary size by 376 KB, and reduces link time for llvm tools slightly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33939 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-31remove temporary vectors.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33715 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-31eliminate temporary vectorsChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33693 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-15rename Type::isIntegral to Type::isInteger, eliminating the old Type::isInteger.Chris Lattner
rename Type::getIntegralTypeMask to Type::getIntegerTypeMask. This makes naming much more consistent. For example, there are now no longer any instances of IntegerType that are not considered isInteger! :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33225 91177308-0d34-0410-b5e6-96231b3b80d8
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-06-23 20:29:33 +0000