other build system about the new C_INCLUDE_DIRS configure option.


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The clang patch is next.



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functions like floorf, ceilf, ... Add test for detecting nearbyintf.

This change was prompted by test/Transforms/SimplifyLibCalls/floor.ll


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which implements GCC PR18046.  This also gets us 360 more
jump threads on 176.gcc.


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making the new LVI stuff smart enough to subsume some special
cases in the old code.  Disable them when LVI is around, the
testcase still passes.


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constant constraints.  Improve the LVI lattice to include inequality 
constraints.


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MachineBasicBlock so other passes can utilize it.



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Revert 86857. It's causing consumer-typeset to fail, and there's a better way to do it forthcoming anyway.

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otherwise create a stub.

Add a test to make sure we don't create extraneous stubs.


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CreateNSWSub functions.


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allows us to handle the test10 testcase.


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Fixed an iteration condition in PreAllocSplitting. This should fix some miscompilations casued by PreAllocSplitting.


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the basic.ll testcase.


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This allows StringRef to skip controversial if(str) check in constructor.
Buildbots, wait for corresponding clang and llvm-gcc FE check-ins!


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can be made to fall through into the other.


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"nounwind" attribute.


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strswitch.


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uses LVI info when -enable-jump-threading-lvi is passed.


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instead of typedefs for std::pair. This simplifies the type of
SameTails, which previously was std::vector<std::pair<std::vector<std::pair<unsigned, MachineBasicBlock *> >::iterator, MachineBasicBlock::iterator>


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x86 users can now return arbitrary sized structs.  Structs too large to fit in return registers will be returned through a hidden sret parameter introduced during SelectionDAG construction.

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tail merging support to handle more cases.
 - Recognize several cases where tail merging is beneficial even when
   the tail size is smaller than the generic threshold.
 - Make use of MachineInstrDesc::isBarrier to help detect
   non-fallthrough blocks.
 - Check for and avoid disrupting fall-through edges in more cases.


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- Edges are split before any phis are eliminated, so the code is SSA.

- Create a proper IR BasicBlock for the split edges.

- LiveVariables::addNewBlock now has same syntax as
  MachineDominatorTree::addNewBlock. Algorithm calculates predecessor live-out
  set rather than successor live-in set.

This feature still causes some miscompilations.

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add debug info location to an instruction.


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Add TargetLowering::isLegalICmpImmediate. It tells LSR what immediate can be folded into target icmp instructions.

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