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* DIGlobalVariable can be used to encode debug info for globals that are ↵Devang Patel2010-08-251-2/+2
| | | | | | directly folded into a constant by FE. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112072 91177308-0d34-0410-b5e6-96231b3b80d8
* Use MapValue in the Linker instead of having a private functionDan Gohman2010-08-244-32/+3
| | | | | | | | | which does the same thing. This eliminates redundant code and handles MDNodes better. MDNode linking still doesn't fully work yet though. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111941 91177308-0d34-0410-b5e6-96231b3b80d8
* Turn LVI on, previously detected failures should be fixed now.Owen Anderson2010-08-241-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111923 91177308-0d34-0410-b5e6-96231b3b80d8
* MapValue support for MDNodes. This is similar to r109117, exceptDan Gohman2010-08-241-8/+27
| | | | | | | | | that it avoids a lot of unnecessary cloning by avoiding remapping MDNode cycles when none of the nodes in the cycle actually need to be remapped. Also it uses the new temporary MDNode mechanism. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111922 91177308-0d34-0410-b5e6-96231b3b80d8
* Turn LVI back off, I have a testcase now.Owen Anderson2010-08-231-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111834 91177308-0d34-0410-b5e6-96231b3b80d8
* Re-enable LazyValueInfo. Monitoring for failures.Owen Anderson2010-08-231-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111816 91177308-0d34-0410-b5e6-96231b3b80d8
* Now that PassInfo and Pass::ID have been separated, move the rest of the ↵Owen Anderson2010-08-239-16/+19
| | | | | | passes over to the new registration API. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111815 91177308-0d34-0410-b5e6-96231b3b80d8
* Re-apply r111568 with a fix for the clang self-host.Owen Anderson2010-08-201-0/+47
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111665 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r111568 to unbreak clang self-host.Owen Anderson2010-08-191-45/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111571 91177308-0d34-0410-b5e6-96231b3b80d8
* When a set of bitmask operations, typically from a bitfield initialization, ↵Owen Anderson2010-08-191-0/+45
| | | | | | | | | only modifies the low bytes of a value, we can narrow the store to only over-write the affected bytes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111568 91177308-0d34-0410-b5e6-96231b3b80d8
* Disable LVI while I evaluate a failure.Owen Anderson2010-08-191-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111551 91177308-0d34-0410-b5e6-96231b3b80d8
* Tentatively enabled LVI by default. I'll be monitoring for any failures.Owen Anderson2010-08-191-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111543 91177308-0d34-0410-b5e6-96231b3b80d8
* Process the step before the start, because it's usually the simplerDan Gohman2010-08-191-3/+3
| | | | | | | of the two. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111495 91177308-0d34-0410-b5e6-96231b3b80d8
* Inform LazyValueInfo whenever a block is deleted, to avoid dangling pointer ↵Owen Anderson2010-08-181-0/+7
| | | | | | issues. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111382 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR7755: knowing something about an inval for a predChris Lattner2010-08-181-8/+4
| | | | | | | | | | from the LHS should disable reconsidering that pred on the RHS. However, knowing something about the pred on the RHS shouldn't disable subsequent additions on the RHS from happening. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111349 91177308-0d34-0410-b5e6-96231b3b80d8
* fit in 80 colsChris Lattner2010-08-181-2/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111348 91177308-0d34-0410-b5e6-96231b3b80d8
* remove some dead code.Chris Lattner2010-08-183-15/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111344 91177308-0d34-0410-b5e6-96231b3b80d8
* remove dead prototype.Chris Lattner2010-08-181-2/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111342 91177308-0d34-0410-b5e6-96231b3b80d8
* Temporarily revert r110987 as it's causing some miscompares inEric Christopher2010-08-171-123/+64
| | | | | | | vector heavy code. I'll re-enable when we've tracked down the problem. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111318 91177308-0d34-0410-b5e6-96231b3b80d8
* When rotating loops, put the original header at the bottom of theDan Gohman2010-08-171-0/+20
| | | | | | | | loop, making the resulting loop significantly less ugly. Also, zap its trivial PHI nodes, since it's easy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111255 91177308-0d34-0410-b5e6-96231b3b80d8
* Use the getUniquePredecessor() utility function, instead of doingDan Gohman2010-08-171-15/+5
| | | | | | | what it does manually. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111248 91177308-0d34-0410-b5e6-96231b3b80d8
* Add an option to disable codegen prepare critical edge splitting. In theory, ↵Evan Cheng2010-08-171-6/+14
| | | | | | PHI elimination is already doing all (most?) of the splitting needed. But machine-licm and machine-sink seem to miss some important optimizations when splitting is disabled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111224 91177308-0d34-0410-b5e6-96231b3b80d8
* Instead of having CollectSubexpr's categorize operands as interesting orDan Gohman2010-08-161-19/+14
| | | | | | | | | uninteresting, just put all the operands on one list and make GenerateReassociations make the decision about what's interesting. This is simpler, and it avoids an extra ScalarEvolution::getAddExpr call. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111133 91177308-0d34-0410-b5e6-96231b3b80d8
* Put add operands in ScalarEvolution-canonical order, when convenient.Dan Gohman2010-08-161-2/+2
| | | | | | | | This isn't necessary, because ScalarEvolution sorts them anyway, but it's tidier this way. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111132 91177308-0d34-0410-b5e6-96231b3b80d8
* Avoid #include <ScalarEvolution.h> in LoopSimplify.cpp, which doesn'tDan Gohman2010-08-161-2/+1
| | | | | | | actually use ScalarEvolution. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111124 91177308-0d34-0410-b5e6-96231b3b80d8
* Instead, teach SimplifyCFG to trim non-address-taken blocks fromDan Gohman2010-08-161-2/+3
| | | | | | | indirectbr destination lists. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111122 91177308-0d34-0410-b5e6-96231b3b80d8
* LoopSimplify shouldn't split loop backedges that use indirectbr. PR7867.Dan Gohman2010-08-141-0/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111061 91177308-0d34-0410-b5e6-96231b3b80d8
* Teach SimplifyCFG how to simplify indirectbr instructions.Dan Gohman2010-08-143-16/+45
| | | | | | | | | | | | - Eliminate redundant successors. - Convert an indirectbr with one successor into a direct branch. Also, generalize SimplifyCFG to be able to be run on a function entry block. It knows quite a few simplifications which are applicable to the entry block, and it only needs a few checks to avoid trouble with the entry block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111060 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix LSR's ExtractImmediate and ExtractSymbol to avoid callingDan Gohman2010-08-131-4/+8
| | | | | | | | ScalarEvolution::getAddExpr, which can be pretty expensive, when nothing has changed, which is pretty common. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111042 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply this transformation now that it is passing the external test which ↵Nate Begeman2010-08-131-64/+123
| | | | | | it previously failed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110987 91177308-0d34-0410-b5e6-96231b3b80d8
* fix PR7876: If ipsccp decides that a function's address is takenChris Lattner2010-08-121-4/+15
| | | | | | | before it rewrites the code, we need to use that in the post-rewrite pass. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110962 91177308-0d34-0410-b5e6-96231b3b80d8
* Temporarily revert 110737 and 110734, they were causing failuresEric Christopher2010-08-121-141/+64
| | | | | | | in an external testsuite. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110905 91177308-0d34-0410-b5e6-96231b3b80d8
* Add the minimal amount of smarts necessary to instcombine of shufflevectors ↵Nate Begeman2010-08-101-64/+141
| | | | | | | | | | | | | | | to recognize patterns generated by clang for transpose of a matrix in generic vectors. This is made of two parts: 1) Propagating vector extracts of hi/lo half into their users 2) Recognizing an insertion of even elements followed by the odd elements as an unpack. Testcase to come, but this shrinks the # of shuffle instructions generated on x86 from ~40 to the minimal 8. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110734 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a use after free error caught by the valgrind builders.Nick Lewycky2010-08-091-2/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110601 91177308-0d34-0410-b5e6-96231b3b80d8
* PR7853: fix a silly mistake introduced in r101899, and add a test to make sureEli Friedman2010-08-091-1/+1
| | | | | | | | it doesn't regress again. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110597 91177308-0d34-0410-b5e6-96231b3b80d8
* Do more to modernize MergeFunctions. Refactor in response to Chris' code review.Nick Lewycky2010-08-081-91/+81
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110538 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't attempt the PRE inline asm calls, since we don't value number them ↵Owen Anderson2010-08-071-0/+5
| | | | | | yet. Fixes PR7835. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110489 91177308-0d34-0410-b5e6-96231b3b80d8
* Eliminate PromoteMemoryToRegisterID; just use addPreserved("mem2reg")Dan Gohman2010-08-064-5/+3
| | | | | | | instead, as an example of what this looks like. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110478 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply r110396, with fixes to appease the Linux buildbot gods.Owen Anderson2010-08-0664-84/+84
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110460 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix uninitialized variable warning.Nick Lewycky2010-08-061-2/+2
| | | | | | | | | Also move 'default' case next to a real case to help compiler optimize in non-Debug builds. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110435 91177308-0d34-0410-b5e6-96231b3b80d8
* Work in progress, cleaning up MergeFuncs.Nick Lewycky2010-08-061-180/+40
| | | | | | | | | Further clean up the comparison function by removing overly generalized "domains". Remove all understanding of ELF aliases and simplify folding code and comments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110434 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r110396 to fix buildbots.Owen Anderson2010-08-0664-84/+84
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110410 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't use PassInfo* as a type identifier for passes. Instead, use the ↵Owen Anderson2010-08-0564-84/+84
| | | | | | | | | address of the static ID member as the sole unique type identifier. Clean up APIs related to this change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110396 91177308-0d34-0410-b5e6-96231b3b80d8
* Give JumpThreading+LVI a long-form cl::opt so that it's easier to toggle the ↵Owen Anderson2010-08-051-1/+4
| | | | | | default. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110384 91177308-0d34-0410-b5e6-96231b3b80d8
* Experiments show that we can safely increase our unrolling threshold without ↵Owen Anderson2010-08-041-1/+1
| | | | | | | | | unduly impacting code size, particularly since unrolling is not enabled at -Os. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110233 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix whitespace.Dan Gohman2010-08-041-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110223 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a comment.Dan Gohman2010-08-041-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110181 91177308-0d34-0410-b5e6-96231b3b80d8
* Thread const correctness through a bunch of AliasAnalysis interfaces andDan Gohman2010-08-031-1/+1
| | | | | | | | | | | | | eliminate several const_casts. Make CallSite implicitly convertible to ImmutableCallSite. Rename the getModRefBehavior for intrinsic IDs to getIntrinsicModRefBehavior to avoid overload ambiguity with CallSite, which happens to be implicitly convertible to bool. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110155 91177308-0d34-0410-b5e6-96231b3b80d8
* Make instcombine set explicit alignments on load or storeDan Gohman2010-08-031-6/+14
| | | | | | | | instructions with alignment 0, so that subsequent passes don't need to bother checking the TargetData ABI size manually. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110128 91177308-0d34-0410-b5e6-96231b3b80d8
* Add an atomic lowering passPeter Collingbourne2010-08-032-0/+161
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110113 91177308-0d34-0410-b5e6-96231b3b80d8
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