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2011-04-20The bitcast case here is actually handled uniformly earlier in the function, soCameron Zwarich
delete it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129877 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-20Cleanup some code to better use an early return style in preparation for addingCameron Zwarich
more cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129876 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-15Fix a ton of comment typos found by codespell. Patch byChris Lattner
Luis Felipe Strano Moraes! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129558 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-14Fix an infinite alternation in JumpThreading where two transforms would ↵Owen Anderson
repeatedly undo each other. The solution is to perform more aggressive constant folding to make one of the edges just folded away rather than trying to thread it. Fixes <rdar://problem/9284786>. Discovered with CSmith. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129538 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-14Cleanup r129509 based on comments by ChrisMon P Wang
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129532 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-14Cleanup r129472 by using a utility routine as suggested by Eli.Mon P Wang
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129509 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-14fix a couple -Wsign-compare warnings.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129501 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-13Vectors with different number of elements of the same element type can haveMon P Wang
the same allocation size but different primitive sizes(e.g., <3xi32> and <4xi32>). When ScalarRepl promotes them, it can't use a bit cast but should use a shuffle vector instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129472 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-13Fixed the revision 129449.Junjie Gu
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129450 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-13Passing unroll parameters (unroll-count, threshold, and partial unroll) via ↵Junjie Gu
LoopUnroll class's ctor. Doing so will allow multiple context with different loop unroll parameters to run. This is a minor change and no effect on existing application. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129449 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-13Add the alias analysis to the C api.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129447 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-13Reapply r129401 with patch for clang.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129419 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-12Revert r129401 for now. Clang is using the old way of doing things.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129403 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-12Remove the unaligned load intrinsics in favor of using native unaligned loads.Bill Wendling
Now that we have a first-class way to represent unaligned loads, the unaligned load intrinsics are superfluous. First part of <rdar://problem/8460511>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129401 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-12Fix reassociate to use a worklist instead of recursing when newDan Gohman
reassociation opportunities are exposed. This fixes a bug where the nested reassociation expects to be the IR to be consistent, but it isn't, because the outer reassociation has disconnected some of the operands. rdar://9167457 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129324 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-11Don't include Operator.h from InstrTypes.h.Jay Foad
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129271 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-09fix PR9523, a crash in looprotate on a non-canonical loop made out of ↵Chris Lattner
indirectbr. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129203 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-09Fix a bug where RecursivelyDeleteTriviallyDeadInstructions couldChris Lattner
delete the instruction pointed to by CGP's current instruction iterator, leading to a crash on the testcase. This fixes PR9578. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129200 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-07Expose more passes to the C API.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129087 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-07PR9634: Don't unconditionally tell the AliasSetTracker that the PreheaderLoadEli Friedman
is equivalent to any other relevant value; it isn't true in general. If it is equivalent, the LoopPromoter will tell the AST the equivalence. Also, delete the PreheaderLoad if it is unused. Chris, since you were the last one to make major changes here, can you check that this is sane? git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129049 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-30* The DSE code that tested for overlapping needed to take into account the factBill Wendling
that one of the numbers is signed while the other is unsigned. This could lead to a wrong result when the signed was promoted to an unsigned int. * Add the data layout line to the testcase so that it will test the appropriate thing. Patch by David Terei! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128577 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-30Remove PHINode::reserveOperandSpace(). Instead, add a parameter toJay Foad
PHINode::Create() giving the (known or expected) number of operands. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128537 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-30(Almost) always call reserveOperandSpace() on newly created PHINodes.Jay Foad
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128535 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-29DSE: Remove an early exit optimization that depended on the ordering of a ↵Benjamin Kramer
SmallPtrSet. Fixes PR9569 and will hopefully make selfhost on ASLR-enabled systems more deterministic. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128482 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-29Do some simple copy propagation through integer loads and stores when promotingCameron Zwarich
vector types. This helps a lot with inlined functions when using the ARM soft float ABI. Fixes <rdar://problem/9184212>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128453 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-26Simplification noticed by Frits.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128333 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-26Rework the logic that determines if a store completely overlaps an ealier store.Bill Wendling
There are two ways that a later store can comletely overlap a previous store: 1. They both start at the same offset, but the earlier store's size is <= the later's size, or 2. The earlier store's offset is > the later's offset, but it's offset + size doesn't extend past the later's offset + size. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128332 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-26Fix a typo and add a test.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128331 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-26PR9561: A store with a negative offset (via GEP) could erroniously say that itBill Wendling
completely overlaps a previous store, thus mistakenly deleting that store. Check for this condition. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128319 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-24Debug intrinsics must be skipped at the beginning and ends of blocks, lest theyCameron Zwarich
affect the generated code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128217 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-24It is enough for the CallInst to have no uses to be made a tail call with a retCameron Zwarich
void; it doesn't need to have a void type. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128212 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-24s/UpdateDT/ModifiedDT/gDevang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128211 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-24Do early taildup of ret in CodeGenPrepare for potential tail calls that have aCameron Zwarich
void return type. This fixes PR9487. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128197 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-24Use an early return instead of a long if block.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128196 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-24When UpdateDT is set, DT is invalid, which could cause problems when trying toCameron Zwarich
use it later. I couldn't make a test that hits this with the current code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128195 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-24Check for TLI so that -codegenprepare can be used from opt.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128194 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-23Fix PR9464 by correcting some math that just happened to be right in most casesCameron Zwarich
that were hit in practice. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128146 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-21Re-apply r127953 with fixes: eliminate empty return block if it has no ↵Evan Cheng
predecessors; update dominator tree if cfg is modified. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127981 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-19Revert r127953, "SimplifyCFG has stopped duplicating returns into predecessorsDaniel Dunbar
to canonicalize IR", it broke a lot of things. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127954 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-19SimplifyCFG has stopped duplicating returns into predecessors to canonicalize IREvan Cheng
to have single return block (at least getting there) for optimizations. This is general goodness but it would prevent some tailcall optimizations. One specific case is code like this: int f1(void); int f2(void); int f3(void); int f4(void); int f5(void); int f6(void); int foo(int x) { switch(x) { case 1: return f1(); case 2: return f2(); case 3: return f3(); case 4: return f4(); case 5: return f5(); case 6: return f6(); } } => LBB0_2: ## %sw.bb callq _f1 popq %rbp ret LBB0_3: ## %sw.bb1 callq _f2 popq %rbp ret LBB0_4: ## %sw.bb3 callq _f3 popq %rbp ret This patch teaches codegenprep to duplicate returns when the return value is a phi and where the phi operands are produced by tail calls followed by an unconditional branch: sw.bb7: ; preds = %entry %call8 = tail call i32 @f5() nounwind br label %return sw.bb9: ; preds = %entry %call10 = tail call i32 @f6() nounwind br label %return return: %retval.0 = phi i32 [ %call10, %sw.bb9 ], [ %call8, %sw.bb7 ], ... [ 0, %entry ] ret i32 %retval.0 This allows codegen to generate better code like this: LBB0_2: ## %sw.bb jmp _f1 ## TAILCALL LBB0_3: ## %sw.bb1 jmp _f2 ## TAILCALL LBB0_4: ## %sw.bb3 jmp _f3 ## TAILCALL rdar://9147433 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127953 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-18Remove TargetData and ValueTracking includes. I didn't mean for them to ↵Andrew Trick
sneak in my last checkin. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127842 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-17Added isValidRewrite() to check the result of ScalarEvolutionExpander.Andrew Trick
SCEV may generate expressions composed of multiple pointers, which can lead to invalid GEP expansion. Until we can teach SCEV to follow strict pointer rules, make sure no bad GEPs creep into IR. Fixes rdar://problem/9038671. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127839 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-17whitespaceAndrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127837 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-16Fix a comment.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127728 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-16Only convert allocas to scalars if it is profitable. The profitability metric ICameron Zwarich
chose is having a non-memcpy/memset use and being larger than any native integer type. Originally I chose having an access of a size smaller than the total size of the alloca, but this caused some minor issues on the spirit benchmark where SRoA runs again after some inlining. This fixes <rdar://problem/8613163>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127718 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-16Better use initializer lists.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127716 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-16Add a clarifying comment.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127715 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-14Added SCEV::NoWrapFlags to manage unsigned, signed, and self wrapAndrew Trick
properties. Added the self-wrap flag for SCEV::AddRecExpr. A slew of temporary FIXMEs indicate the intention of the no-self-wrap flag without changing behavior in this revision. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127590 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-14whitespaceAndrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127589 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-11Roll r127459 back in:Cameron Zwarich
Optimize trivial branches in CodeGenPrepare, which often get created from the lowering of objectsize intrinsics. Unfortunately, a number of tests were relying on llc not optimizing trivial branches, so I had to add an option to allow them to continue to test what they originally tested. This fixes <rdar://problem/8785296> and <rdar://problem/9112893>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127498 91177308-0d34-0410-b5e6-96231b3b80d8
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