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2008-12-15refactor some code into a new TryToOptimizeStoreOfMallocToGlobal function.Chris Lattner
Use GetElementPtrInst::hasAllZeroIndices where possible. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61045 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15add a basic test for heap-sraChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61041 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15Teach basicaa to use the nocapture attribute when possible. When theChris Lattner
intrinsics are properly marked nocapture, the fixme should be addressed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61040 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15Fix printing of PseudoSourceValues in SDNode graphs.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61036 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15Fix a typo in a comment.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61035 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15add some more notes.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61033 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15Add a testcase for GCC PR 23455, which lpre handles now. Add someChris Lattner
comments about why we're not getting other cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61032 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15Update generated files after nocapture syntax change.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61031 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15It turns out that "align 1" and unaligned are different. Add a bias to theNick Lewycky
alignment attribute such that 0 means unaligned. This will probably require a rebuild of llvm-gcc because of the change to Attributes.h. If you see many test failures on "make check", please rebuild your llvm-gcc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61030 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15Added support to LegalizeType for expanding the operands of scalar to vectorMon P Wang
and insert vector element. Modified extract vector element to extend the result to match the expected promoted type. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61029 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15gvn now hoists this load out of the hot non-call path.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61028 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15Enable Load PRE. This teaches GVN to push partially redundant loads up theChris Lattner
CFG when there is exactly one predecessor where the load is not available. This is designed to not increase code size but still eliminate partially redundant loads. This fires 1765 times on 403.gcc even though it doesn't do critical edge splitting yet (the most common reason for it to fail). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61027 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15if we have a phi translation failure of the start block,Chris Lattner
return *just* a clobber of the start block, not other random stuff as well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61026 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15Adjust testcase to make it more stable across visitation order changes,Chris Lattner
unbreaking it after r61024. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61025 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15Ifdef out some code that I didn't mean to enable by default yet.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61024 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15make GVN try to rename inputs to the resultant replaced values, whichChris Lattner
cleans up the generated code a bit. This should have the added benefit of not randomly renaming functions/globals like my previous patch did. :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61023 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15Implement initial support for PHI translation in memdep. This means thatChris Lattner
memdep keeps track of how PHIs affect the pointer in dep queries, which allows it to eliminate the load in cases like rle-phi-translate.ll, which basically end up being: BB1: X = load P br BB3 BB2: Y = load Q br BB3 BB3: R = phi [P] [Q] load R turning "load R" into a phi of X/Y. In addition to additional exposed opportunities, this makes memdep safe in many cases that it wasn't before (which is required for load PRE) and also makes it substantially more efficient. For example, consider: bb1: // has many predecessors. P = some_operator() load P In this example, previously memdep would scan all the predecessors of BB1 to see if they had something that would mustalias P. In some cases (e.g. test/Transforms/GVN/rle-must-alias.ll) it would actually find them and end up eliminating something. In many other cases though, it would scan and not find anything useful. MemDep now stops at a block if the pointer is defined in that block and cannot be phi translated to predecessors. This causes it to miss the (rare) cases like rle-must-alias.ll, but makes it faster by not scanning tons of stuff that is unlikely to be useful. For example, this speeds up GVN as a whole from 3.928s to 2.448s (60%)!. IMO, scalar GVN should be enhanced to simplify the rle-must-alias pointer base anyway, which would allow the loads to be eliminated. In the future, this should be enhanced to phi translate through geps and bitcasts as well (as indicated by FIXMEs) making memdep even more powerful. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61022 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15Add support for slow-path GVN with full phi construction for scalars. This ↵Owen Anderson
is disabled for now, as it actually pessimizes code in the abscence of phi translation for load elimination. This slow down GVN a bit, by about 2% on 403.gcc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61021 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15Fix whitespace in comment.Nick Lewycky
Remove TODO; icmp isn't a binary operator, so this function will never deal with them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61020 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15Introducing nocapture, a parameter attribute for pointers to indicate that theNick Lewycky
callee will not introduce any new aliases of that pointer. The attributes had all bits allocated already, so I decided to collapse alignment. Alignment was previously stored as a 16-bit integer from bits 16 to 32 of the attribute, but it was required to be a power of 2. Now it's stored in log2 encoded form in five bits from 16 to 21. That gives us 11 more bits of space. You may have already noticed that you only need four bits to encode a 16-bit power of two, so why five bits? Because the AsmParser accepted 32-bit alignments, even though we couldn't store them (they were silently discarded). Now we can store them in memory, but not in the bitcode. The bitcode format was already storing these as 64-bit VBR integers. So, the bitcode format stays the same, keeping the alignment values stored as 16 bit raw values. There's some hideous code in the reader and writer that deals with this, waiting to be ripped out the moment we run out of bits again and have to replace the parameter attributes table encoding. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61019 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-14silence warning when asserts disabled.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61014 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-14silence warning when asserts disabled.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61013 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-14eliminate warning when asserts disabled.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61012 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-14another random testcase that shouldn't crash gvn and isChris Lattner
good for coverage with future changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61011 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-14Clarify the meaning of the NoAlias response. The plan is to refer to this fromNick Lewycky
a future version of LangRef. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61010 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-14Generalize GVN's phi construciton routine to work for things other than loads.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61009 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-14Reapply r60997, this time without forgetting thatDuncan Sands
target constants are allowed to have an illegal type. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61006 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-14Fixed HTML validator warning.Misha Brukman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61005 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-14CSS cleanup:Misha Brukman
* Lowercased all HTML element names * Standardized spacing around { and } * removed class "doc_table_nw": grep finds no uses git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61004 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13Temporarily revert r60997. It was causing this failure:Bill Wendling
Running /Users/void/llvm/llvm.src/test/CodeGen/Generic/dg.exp ... FAIL: /Users/void/llvm/llvm.src/test/CodeGen/Generic/asm-large-immediate.ll Failed with exit(1) at line 1 while running: llvm-as < /Users/void/llvm/llvm.src/test/CodeGen/Generic/asm-large-immediate.ll | llc | /usr/bin/grep 68719476738 Assertion failed: ((TypesNeedLegalizing || getTypeAction(VT) == Legal) && "Illegal type introduced after type legalization?"), function HandleOp, file /Users/void/llvm/llvm.src/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp, line 493. 0 llc 0x0085392e char const* std::find<char const*, char>(char const*, char const*, char const&) + 98 1 llc 0x00853e63 llvm::sys::PrintStackTraceOnErrorSignal() + 593 2 libSystem.B.dylib 0x96cac09b _sigtramp + 43 3 libSystem.B.dylib 0xffffffff _sigtramp + 1765097359 4 libSystem.B.dylib 0x96d24ec2 raise + 26 5 libSystem.B.dylib 0x96d3447f abort + 73 6 libSystem.B.dylib 0x96d26063 __assert_rtn + 101 7 llc 0x004f9018 llvm::cast_retty<llvm::SubprogramDesc, llvm::DebugInfoDesc*>::ret_type llvm::cast<llvm::Sub ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61001 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13LegalizeDAG is not supposed to introduce illegalDuncan Sands
types into the DAG if they were not already there. Check this with an assertion. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60997 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13RLE isn't smart enough to eliminate this safely yet.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60994 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13rename some tests to be more uniform in naming convention.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60988 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13gvn should never crash on this.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60987 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13These messages should always be emitted when NDEBUG is unset, not whenChris Lattner
NDEBUG is unset and -debug is passed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60986 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13Add a comment to the auto-generated docs.Mikhail Glushenkov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60985 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13Merge llvm-rst.css and llvm.css.Mikhail Glushenkov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60984 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13Add explicit this-> for some member function in templated base class.Cedric Venet
These call are probably dependent but VS with /Za don't seems to think so. We need to help him. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60978 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13Temporarily revert r60973. It's inexplicably causing a failure when ↵Bill Wendling
self-hosting LLVM: llvm[2]: Linking Release executable opt (without symbols) ... Undefined symbols: "llvm::APFloat::IEEEsingle", referenced from: __ZN4llvm7APFloat10IEEEsingleE$non_lazy_ptr in libLLVMCore.a(Constants.o) __ZN4llvm7APFloat10IEEEsingleE$non_lazy_ptr in libLLVMCore.a(AsmWriter.o) __ZN4llvm7APFloat10IEEEsingleE$non_lazy_ptr in libLLVMCore.a(ConstantFold.o) "llvm::APFloat::IEEEdouble", referenced from: __ZN4llvm7APFloat10IEEEdoubleE$non_lazy_ptr in libLLVMCore.a(Constants.o) __ZN4llvm7APFloat10IEEEdoubleE$non_lazy_ptr in libLLVMCore.a(AsmWriter.o) __ZN4llvm7APFloat10IEEEdoubleE$non_lazy_ptr in libLLVMCore.a(ConstantFold.o) ld: symbol(s) not found This is in release mode. To replicate, compile llvm and llvm-gcc in optimized mode. Then build llvm, in optimized mode, with the newly created compiler. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60977 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13Fix getFieldAs() to use the parameter instead of 6.Torok Edwin
Add missing DIType constructor, needed by DIVariable::getType(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60976 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13Remove assertion to allow promotion of a truncating store operandMon P Wang
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60975 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13Added basic support for expanding VSETCCMon P Wang
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60974 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13make RLE preserve the name of the load that it replaces. This is justChris Lattner
a pretification of the IR. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60973 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13On big-endian machines it is wrong to do a fullDuncan Sands
width register load followed by a truncating store for the copy, since the load will not place the value in the lower bits. Probably partial loads/stores can never happen here, but fix it anyway. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60972 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13Fix spelling.Misha Brukman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60971 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13Some more documentation tweaks.Mikhail Glushenkov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60970 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-13More cosmetic tweaks for llvmc docs.Mikhail Glushenkov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60969 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-12Re-enable test.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60968 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-12Do not print empty DW_AT_comp_dir.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60965 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-12When expanding unaligned loads and stores do not makeDuncan Sands
use of illegal integer types: instead, use a stack slot and copying via integer registers. The existing code is still used if the bitconvert is to a legal integer type. This fires on the PPC testcases 2007-09-08-unaligned.ll and vec_misaligned.ll. It looks like equivalent code is generated with these changes, just permuted, but it's hard to tell. With these changes, nothing in LegalizeDAG produces illegal integer types anymore. This is a prerequisite for removing the LegalizeDAG type legalization code. While there I noticed that the existing code doesn't handle trunc store of f64 to f32: it turns this into an i64 store, which represents a 4 byte stack smash. I added a FIXME about this. Hopefully someone more motivated than I am will take care of it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60964 91177308-0d34-0410-b5e6-96231b3b80d8
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