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2008-07-18Make PRE actually handle critical edges (by splitting them). Confirmed that ↵Owen Anderson
bootstrap passes with this change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53762 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-18Reapply r53735. My last patch fixed the failures Dan observed.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53761 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-18Add some checks that got lost in the shuffle. This fixes 464.h264ref.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53760 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-18Revert r53735. It broke SPEC 464.h264ref.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53757 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-17Use MergeBlockIntoPredecessor to simplify some code.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53735 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-17Make MergeBlockIntoPredecessor more aggressive when the same successor appearsOwen Anderson
more than once. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53731 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-17Enable PRE. My last batch of changes fixed the miscompile.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53730 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-17Make GlobalOpt preserve address spaces when scalar replacing aggregate globals.Matthijs Kooijman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53716 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-17Fix PR2553Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53715 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-17Inliner tweak. Function calls should cost more than one instruction!Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53712 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-17Factor MergeBlockIntoPredecessor out into BasicBlockUtils.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53705 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-16There's no need to iterate block merging and PRE. In fact, iterating the latterOwen Anderson
could cause problems for memdep when it breaks critical edges. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53691 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-16Redo InstCombiner::visitExtractValueInst. Instead of using the (complicate)Matthijs Kooijman
FindInsertedValue, it now performs a number of simple transformations that should result in the same effect when applied iteratively. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53673 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-16Fix PR2296. Do not transform x86_sse2_storel_dq into a full-width store.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53666 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-15Revert this, as it seems to still be broken.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53627 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-15Enable local PRE by default.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53616 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-15Have GVN do a pre-pass over the CFG that folds away unconditional branches ↵Owen Anderson
where possible. This allows local PRE to be more aggressive. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53615 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-15Allow deadargelim to change return types even though now values were dead. ThisMatthijs Kooijman
again canonicalizes {i32} into i32 and {} into void. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53610 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-15Revert r53606. It turns out that explicitely tracking the liveness of theMatthijs Kooijman
return value as a whole in deadargelim is really not needed now that we simply rebuild the old return value and actually prevents some canonicalization from taking place. This revert stops deadargelim from changing {i32} into i32 for now, but I'll fix that next. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53609 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-15Make deadargelim a bit less smart, so it doesn't choke on nested structs asMatthijs Kooijman
return values that are still (partially) live. Instead of updating all uses of a call instruction after removing some elements, it now just rebuilds the original struct (With undef gaps where the unused values were) and leaves it to instcombine to clean this up. The added testcase still fails currently, but this is due to instcombine which isn't good enough yet. I will fix that part next. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53608 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-15Don't use isa when we can reuse a previous dyn_cast.Matthijs Kooijman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53607 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-15Make DeadArgElim keep liveness of the return value as a whole in addition toMatthijs Kooijman
only the liveness of partial return values (for functions returning a struct). This is more explicit to prevent unwanted changes in the return value. In particular, deadargelim now canonicalizes a function returning {i32} to returning i32 and {} to void, if the struct returned is not used in its entirety, but only the single element is used. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53606 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-15Let DAE keep a list of live functions, instead of simply marking all argumentsMatthijs Kooijman
and return values live for those functions. This doesn't change anything yet, but prepares for the coming commits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53601 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-15Split DAE::MarkLive into MarkLive and PropagateLiveness.Matthijs Kooijman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53600 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-15Pass around const RetOrArg references instead of copying values. Also, markMatthijs Kooijman
RetOrArg::getDescription() as const. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53599 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-15Simplify debug code by using RetOrArg::getDescription().Matthijs Kooijman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53598 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-15Fix indentation (intentionally left out of the previous commit).Matthijs Kooijman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53592 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-15Move the deadargelim code for intrinsically alive functions into its ownMatthijs Kooijman
method, to slightly simplify control flow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53591 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-14Fix uninitialized use of the Changed variable.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53564 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-14Reapply r53540, now with the matching header!Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53557 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-14Revert r53540 - it does not compile.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53549 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-14If a function calls setjmp, never inline it into other functions. This isChris Lattner
a hack around the fact that we don't represent the CFG correctly for sj/lj. It fixes PR2486. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53540 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-14simplify some code, shuffle and insertelt always return a vector.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53538 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-14Fix PR2506 by being a bit more careful about reverse fact propagation whenChris Lattner
disproving a condition. This actually compiles the existing testcase (udiv_select_to_select_shift) to: define i64 @test(i64 %X, i1 %Cond) { entry: %divisor1.t = lshr i64 %X, 3 ; <i64> [#uses=1] %quotient2 = lshr i64 %X, 3 ; <i64> [#uses=1] %sum = add i64 %divisor1.t, %quotient2 ; <i64> [#uses=1] ret i64 %sum } instead of: define i64 @test(i64 %X, i1 %Cond) { entry: %quotient1.v = select i1 %Cond, i64 3, i64 4 ; <i64> [#uses=1] %quotient1 = lshr i64 %X, %quotient1.v ; <i64> [#uses=1] %quotient2 = lshr i64 %X, 3 ; <i64> [#uses=1] %sum = add i64 %quotient1, %quotient2 ; <i64> [#uses=1] ret i64 %sum } git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53534 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-13Fix mishandling of the infinite loop case when merging two blocks. ThisChris Lattner
fixes PR2540. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53533 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-13more refactoring. Use early exits instead of really complex logic.Chris Lattner
No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53532 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-13improve comments.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53531 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-13factor another large hunk of code out into its own function. Chris Lattner
No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53530 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-13Final bit of simplification for FoldBranchToCommonDest.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53528 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-13simplify logic a bitChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53527 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-13Refactor some code out into its own helper function, getting rid of crazy ↵Chris Lattner
multiline conditionals and commenting the code better. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53526 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-12Enhance analysis of srem.Nick Lewycky
Remove dead code analyzing urem. 'urem' of power-of-2 is canonicalized to an 'and' instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53506 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-11Use find instead of lower_bound.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53474 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-11Don't call lookupNumber more than we have to.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53470 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-11Document 'mask' in this calculation.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53454 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-11Remove misleading constant from comment.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53452 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-11Add another optimization from PR2330. Also catch some missing cases that areNick Lewycky
similar. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53451 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-11a missed optimization that Eli spottedChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53449 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-11another bug in the same line.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53448 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-11fix a bug spotted by Eli's eagle eyesChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53447 91177308-0d34-0410-b5e6-96231b3b80d8
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