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2008-10-04Ignore loads from and stores to local memory (i.e. allocas)Duncan Sands
when deciding whether to mark a function readnone/readonly. Since the pass is currently run before SROA, this may be quite helpful. Requested by Chris on IRC. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57050 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-03Clean up some multiple-return-value code that is no longerDan Gohman
applicable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57033 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-03Nick Lewycky's patch.Devang Patel
While hosting instruction check PHI node. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57025 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-03Teach internalize to preserve the callgraph.Duncan Sands
Why? Because it was there! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56996 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-03SplitBlock should only attempt to update LoopInfo if it is actually being used.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56994 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-01Factorize code: remove variants of "strip offDuncan Sands
pointer bitcasts and GEP's", and centralize the logic in Value::getUnderlyingObject. The difference with stripPointerCasts is that stripPointerCasts only strips GEPs if all indices are zero, while getUnderlyingObject strips GEPs no matter what the indices are. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56922 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-01revert the addition of Preverves(CallGraph), per Duncan's commentsNuno Lopes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56917 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-01Call ScalarEvolution's deleteValueFromRecords before deleting anDan Gohman
instruction, not after. This fixes some uses of free'd memory. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56908 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-30add preserversCFG() + preservers(CallGraph)Nuno Lopes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56887 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-30add AU.setPreservesCFG() since this pass only adds and removes function ↵Nuno Lopes
attributes git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56868 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-30Fix misoptimization of: xor i1 (icmp eq (X, C1), icmp s[lg]t (X, C2))Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56834 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-29Speed up these passes when the callgraph hasDuncan Sands
huge simply connected components. Suggested by Chris. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56787 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-29remove redundant test (mayBeOverriden() includes hasLinkOnceLinkage)Nuno Lopes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56786 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-29Tweak some comments.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56784 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-29Rename isWeakForLinker to mayBeOverridden. Use itDuncan Sands
instead of hasWeakLinkage in a bunch of optimization passes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56782 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-26Implement function notes as function attributes. Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56716 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-26Now Attributes are divided in three groupsDevang Patel
- return attributes - inreg, zext and sext - parameter attributes - function attributes - nounwind, readonly, readnone, noreturn Return attributes use 0 as the index. Function attributes use ~0U as the index. This patch requires corresponding changes in llvm-gcc and clang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56704 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-25 Large mechanical patch.Devang Patel
s/ParamAttr/Attribute/g s/PAList/AttrList/g s/FnAttributeWithIndex/AttributeWithIndex/g s/FnAttr/Attribute/g This sets the stage - to implement function notes as function attributes and - to distinguish between function attributes and return value attributes. This requires corresponding changes in llvm-gcc and clang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56622 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-24Commit CodeGenPrepare.cpp changes which was accidentially left out of 56526.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56549 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-24Fix fallout in CodeGenPrepare from 56526. Will likely need more work.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56546 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-24s/ParamAttrsWithIndex/FnAttributeWithIndex/gDevang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56535 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-24Put FN_NOTE_AlwaysInline and others in FnAttr namespace.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56527 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-23Move FN_NOTE_AlwaysInline and other out of ParamAttrs namespace.Devang Patel
Do not check isDeclaration() in hasNote(). It is clients' responsibility. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56524 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-23s/ParameterAttributes/Attributes/gDevang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56513 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-23Use parameter attribute store (soon to be renamed) forDevang Patel
Function Notes also. Function notes are stored at index ~0. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56511 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-22Add hasNote() to check note associated with a function.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56477 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-22Initial support for the CMake build system.Oscar Fuentes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56419 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-20Implement review feedback from Devang: make useDuncan Sands
of mayReadFromMemory and mayWriteToMemory. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56387 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-19Remove the MarkModRef pass (use AddReadAttrs instead).Duncan Sands
Unfortunately this means removing one regression test of GlobalsModRef because I couldn't work out how to perform it without MarkModRef. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56342 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-19Add a new pass AddReadAttrs which works out which functionsDuncan Sands
can get the readnone/readonly attributes, and gives them it. The plan is to remove markmodref (which did the same thing by querying GlobalsModRef) and delete the analogous functionality from GlobalsModRef. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56341 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-18splitLoop does not handle split condition EQ.Devang Patel
Fixes PR 2805 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56321 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-18Decrementing the iterator here could be wrong if the worklist is empty after ↵Bill Wendling
the "erase". Thanks to Ji Young Park for the patch! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56316 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-18Try to place hoisted instructions befoe icmp instruction.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56315 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-17Do not hoist instruction above branch condition. The instruction may use ↵Devang Patel
branch condition. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56286 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-17Do not ignore iv uses outside the loop.Devang Patel
This one slipped through cracks very well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56284 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-16Improve instcombine's handling of integer min and max in two ways:Dan Gohman
- Recognize expressions like "x > -1 ? x : 0" as min/max and turn them into expressions like "x < 0 ? 0 : x", which is easily recognizable as a min/max operation. - Refrain from folding expression like "y/2 < 1" to "y < 2" when the comparison is being used as part of a min or max idiom, like "y/2 < 1 ? 1 : y/2". In that case, the division has another use, so folding doesn't eliminate it, and obfuscates the min/max, making it harder to recognize as a min/max operation. These benefit ScalarEvolution, CodeGen, and anything else that wants to recognize integer min and max. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56246 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-15Teach LSR to optimize away SMAX operations for tripcounts in commonDan Gohman
cases. See the comment above OptimizeSMax for the full story, and the testcase for an example. This cancels out a pessimization commonly attributed to indvars, and will allow us to lift some of the artificial throttles in indvars, rather than add new ones. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56230 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-11On 64-bit targets, change 32-bit getelementptr indices to be 64-bitDan Gohman
getelementptr indices, inserting an explicit cast if necessary. This helps expose the sign-extension operation to other optimizations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56133 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-11Fix a vectorshuffle instcombine bug introduced by r55995.Dan Gohman
Patch by Nicolas Capens! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56129 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-11Fix a copy+paste bug that Duncan spotted. For severalDan Gohman
cases it was still getting lucky and detecting overflow but it was clearly incorrect. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56113 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-11In my analysis for r56076 I missed the case where the originalDan Gohman
multiplication overflows. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56082 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-10Fix an icmp+sdiv optimization to check for and handle an overflowDan Gohman
condition. This fixes PR2740. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56076 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
2008-09-10Fix a warning about comparing signed and unsigned values.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56040 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
2008-09-09fix overflow check.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56011 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-09Make safer variant of alias resolution routine to be defaultAnton Korobeynikov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56005 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-09Resolve aliases, when possibleAnton Korobeynikov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56001 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-09Make SimplifyDemandedVectorElts simplify vectors with multipleDan Gohman
users, and teach it about shufflevector instructions. Also, fix a subtle bug in SimplifyDemandedVectorElts' insertelement code. This is a patch that was originally written by Eli Friedman, with some fixes and cleanup by me. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55995 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-09Fix simplifycfg crash in handing block merge.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55971 91177308-0d34-0410-b5e6-96231b3b80d8
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