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2010-03-02Don't attempt load PRE when there is no real redundancy (i.e., the load is inBob Wilson
a loop and is itself the only dependency). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97526 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-01When GVN needs to split critical edges for load PRE, check all of theBob Wilson
predecessors before returning. Otherwise, if multiple predecessor edges need splitting, we only get one of them per iteration. This makes a small but measurable compile time improvement with -enable-full-load-pre. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97521 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-01MemoryDepAnalysis is not used if redundant load processing is disabled.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97512 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-01Add some debug output to LoopSimplify.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97458 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-01Spelling fixes.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97453 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-01Prune #includes.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97448 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-28Revert r97245 which seems to be causing performance problems.Bob Wilson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97366 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-27fix grammaro's pointed out by danielChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97313 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-27fix PR6414, a nondeterminism issue in IPSCCP which was becauseChris Lattner
of a subtle interation in a loop operating in densemap order. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97288 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-26Fix rdar://7694996 a miscompile of 183.equake from my patch yesterday,Chris Lattner
confusing the old MAT variable with the new GlobalType one. This caused us to promote the @disp global pointer into: @disp.body = internal global double*** undef instead of: @disp.body = internal global [3 x double**] undef git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97285 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-26remove dead code, by this point all uses of CI are gone.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97283 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-26Move the EnableFullLoadPRE flag from a separate command-line option to anBob Wilson
argument of createGVNPass and set it automatically for -O3. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97245 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-26Remove unused "NoPRE" parameter in GVN and createGVNPass().Bob Wilson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97235 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-26fix PR6435 another bug from the MallocInst elimination work.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97231 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-25rewrite OptimizeGlobalAddressOfMalloc to fix PR6422, some bugsChris Lattner
introduced when mallocinst was eliminated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97178 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-25Make LoopSimplify change conditional branches in loop exiting blocksDan Gohman
which branch on undef to branch on a boolean constant for the edge exiting the loop. This helps ScalarEvolution compute trip counts for loops. Teach ScalarEvolution to recognize single-value PHIs, when safe, and ForgetSymbolicName to forget such single-value PHI nodes as apprpriate in ForgetSymbolicName. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97126 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-25Modernize comment.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97121 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-25Correct whitespace.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97120 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-24Reapply r97010, the speculative revert failed.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97036 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-24Speculatively revert r97010, "Add an argument to PHITranslateValue to specifyDaniel Dunbar
the DominatorTree. ...", in hopes of restoring poor old PPC bootstrap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97027 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-24Fix indentation.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97024 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-24Add an argument to PHITranslateValue to specify the DominatorTree. If thisBob Wilson
argument is non-null, pass it along to PHITranslateSubExpr so that it can prefer using existing values that dominate the PredBB, instead of just blindly picking the first equivalent value that it finds on a uselist. Also when the DominatorTree is specified, have PHITranslateValue filter out any result that does not dominate the PredBB. This is basically just refactoring the check that used to be in GetAvailablePHITranslatedSubExpr and also in GVN. Despite my initial expectations, this change does not affect the results of GVN for any testcases that I could find, but it should help compile time. Before this change, if PHITranslateSubExpr picked a value that does not dominate, PHITranslateWithInsertion would then insert a new value, which GVN would later determine to be redundant and would replace. By picking a good value to begin with, we save GVN the extra work of inserting and then replacing a new value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97010 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-23Don't do (X != Y) ? X : Y -> X for floating-point values; it doesn'tDan Gohman
handle NaN properly. Do (X une Y) ? X : Y -> X if one of X and Y is not zero. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96955 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-23Update memdep when load PRE inserts a new load, and add some debug output.Bob Wilson
I don't have a small testcase for this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96890 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-22Instcombine constant folding can normalize gep with negative index to index ↵Evan Cheng
with large offset. When instcombine objsize checking transformation sees these geps where the offset seemingly point out of bound, it should just return "i don't know" rather than asserting. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96825 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-22Erase deleted instructions from GVN's ValueTable. This fixes assertionBob Wilson
failures from ValueTable::verifyRemoved() when using -debug. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96805 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-22Remove unused variables and parameters.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96780 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-22When emitting an instruction which depends on both a post-incrementedDan Gohman
induction variable value and a loop-variant value, don't force the insert position to be at the post-increment position, because it may not be dominated by the loop-variant value. This fixes a use-before-def problem noticed on PPC. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96774 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-22This cast<Instruction> is unnecessary.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96771 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-19Rename getSDiv to getExactSDiv to reflect its behavior in cases whereDan Gohman
the division would have a remainder. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96693 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-19Check for overflow when scaling up an add or an addrec forDan Gohman
scaled reuse. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96692 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-19recommit 96626, evidence that it broke things appearsDale Johannesen
to be spurious git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96662 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-19Revert 96626, which causes build failure on ppc Darwin.Dale Johannesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96653 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-19When determining the set of interesting reuse factors, considerDan Gohman
strides in foreign loops. This helps locate reuse opportunities with existing induction variables in foreign loops and reduces the need for inserting new ones. This fixes rdar://7657764. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96629 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-18Indvars needs to explicitly notify ScalarEvolution when it is replacingDan Gohman
a loop exit value, so that if a loop gets deleted, ScalarEvolution isn't stick holding on to dangling SCEVAddRecExprs for that loop. This fixes PR6339. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96626 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-18Hoist this loop-invariant logic out of the loop.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96614 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-17Delete some unneeded casts.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96429 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-17Don't attempt to divide INT_MIN by -1; consider such cases toDan Gohman
have overflowed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96428 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-16Rename SuccessorNumber to GetSuccessorNumber.Bob Wilson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96387 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-16Refactor rewriting for PHI nodes into a separate function.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96382 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-16Split critical edges as needed for load PRE.Bob Wilson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96378 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-16Refactor to share code to find the position of a basic block successor in theBob Wilson
terminator's list of successors. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96377 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-16Fix whitespace.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96372 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-16There are two ways of checking for a given type, for example isa<PointerType>(T)Duncan Sands
and T->isPointerTy(). Convert most instances of the first form to the second form. Requested by Chris. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96344 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-16Split the main for-each-use loop again, this time for GenerateTruncates,Dan Gohman
as it also peeks at which registers are being used by other uses. This makes LSR less sensitive to use-list order. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96308 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-15fix PR6305 by handling BlockAddress in a helper functionChris Lattner
called by jump threading. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96263 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-15Uniformize the names of type predicates: rather than having isFloatTy andDuncan Sands
isInteger, we now have isFloatTy and isIntegerTy. Requested by Chris! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96223 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-14Fix whitespace.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96179 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-14Fix a comment.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96178 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-14When complicated expressions are broken down into subexpressionsDan Gohman
with multiplication by constants distributed through, occasionally those subexpressions can include both x and -x. For now, if this condition is discovered within LSR, just prune such cases away, as they won't be profitable. This fixes a "zero allocated in a base register" assertion failure. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96177 91177308-0d34-0410-b5e6-96231b3b80d8
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