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2011-02-21The signed version of our "magic number" computation for the integer ↵Cameron Zwarich
approximation of a constant had a minor typo introduced when copying it from the book, which caused it to favor negative approximations over positive approximations in many cases. Positive approximations require fewer operations beyond the multiplication. In the case of division by 3, we still generate code that is a single instruction larger than GCC's code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126097 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-20Add some limited support for labels in org directives. Hopefully enough to fixRafael Espindola
PR9245. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126091 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-20Make RecursivelyDeleteDeadPHINode delete a phi node that has no users and add aNick Lewycky
test for that. With this change, test/CodeGen/X86/codegen-dce.ll no longer finds any instructions to DCE, so delete the test. Also renamed J and JP to I and IP in RecursivelyDeleteDeadPHINode. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126088 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-20Move "A | ~(A & ?) -> -1" from InstCombine to InstructionSimplify.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126082 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-20InstCombine: Add a bunch of combines of the form x | (y ^ z).Benjamin Kramer
We usually catch this kind of optimization through InstSimplify's distributive magic, but or doesn't distribute over xor in general. "A | ~(A | B) -> A | ~B" hits 24 times on gcc.c. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126081 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-20Fix 9267; Add vector zext support.Nadav Rotem
The DAGCombiner folds the zext into complex load instructions. This patch prevents this optimization on vectors since none of the supported targets knows how to perform load+vector_zext in one instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126080 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-20Teach RecursivelyDeleteDeadPHINodes to handle multiple self-references. PatchNick Lewycky
by Andrew Clinton! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126077 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-20Instead of keeping two Value*->id# mappings, keep one Value->Value mapping andNick Lewycky
one Value set. This is faster because we only need to use the set when there isn't already an entry in the map. No functionality change! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126076 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-20If both operands are loads from stores in memory we can't use movlpd/movlpsEric Christopher
since one needs to be a register operand. Just use movss instead of forcing an operand into a register. Fixes PR9239 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126072 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-20Use explicit add_subdirectory's for LLVM target sublibraries insteadOscar Fuentes
of testing for its presence at cmake time. This way the build automatically regenerates the makefiles when a svn update brings in a new sublibrary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126068 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19PR9218: SimplifyDemandedVectorElts can return a non-null value that is notEli Friedman
the instruction passed in. Make sure to account for this correctly, instead of looping infinitely. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126058 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19Minor x86 README updates.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126054 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19implement PR9264: disambiguating 'bt mem, imm' as a btl.Chris Lattner
This is reasonable to do since all bt-mem forms do the same thing. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126047 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19rewrite the memset_pattern pattern generation stuff to accept any 2/4/8/16-byteChris Lattner
constant, including globals. This makes us generate much more "pretty" pattern globals as well because it doesn't break it down to an array of bytes all the time. This enables us to handle stores of relocatable globals. This kicks in about 48 times in 254.gap, giving us stuff like this: @.memset_pattern40 = internal constant [2 x %struct.TypHeader* (%struct.TypHeader*, %struct.TypHeader*)*] [%struct.TypHeader* (%struct.TypHeader*, %struct .TypHeader*)* @IsFalse, %struct.TypHeader* (%struct.TypHeader*, %struct.TypHeader*)* @IsFalse], align 16 ... call void @memset_pattern16(i8* %scevgep5859, i8* bitcast ([2 x %struct.TypHeader* (%struct.TypHeader*, %struct.TypHeader*)*]* @.memset_pattern40 to i8* ), i64 %tmp75) nounwind git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126044 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19Stores of null pointers should turn into memset, we weren't recognizingChris Lattner
them as splat values. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126041 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19Implement rdar://9009151, transforming strided loop stores ofChris Lattner
unsplatable values into memset_pattern16 when it is available (recent darwins). This transforms lots of strided loop stores of ints for example, like 5 in vpr: Formed memset: call void @memset_pattern16(i8* %4, i8* getelementptr inbounds ([16 x i8]* @.memset_pattern9, i32 0, i32 0), i64 %tmp25) from store to: {%3,+,4}<%11> at: store i32 3, i32* %scevgep, align 4, !tbaa !4 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126040 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19Fix typos.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126018 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19Do not emit empty DW_TAG_lexical_block DIEs. In one test case, size of ↵Devang Patel
debug info reduced by almost 7%. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126009 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19Give SplitAnalysis a VRM member to access VirtRegMap::getOriginal().Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126005 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19Avoid dangling else warnings.Joerg Sonnenberger
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126004 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19Missed member rename for naming convention.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126003 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19This method belonged in VirtRegMap.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126002 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19Separate timers for local and global splitting.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126001 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18These tags are now covered by dwarf::TagString().Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125987 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Provide tag strings for llvm specific tags.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125986 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Do not lose debug info of an inlined function argument even if the argument ↵Devang Patel
is only used through GEPs. This time with a fix that avoids using invalidated DenseMap iterator. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125984 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Use VirtRegMap's Virt2SplitMap to keep track of the original live range ↵Jakob Stoklund Olesen
before splitting. All new virtual registers created for spilling or splitting point back to their original. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125980 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18add a way to disable all builtins, wire it up to opt's ↵Chris Lattner
-disable-simplifylibcalls flag. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125978 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Make loop-idiom use TargetLibraryInfo to determine whether it is allowedChris Lattner
to hack on memset, memcpy etc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125974 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Move library stuff out of the toplevel CMakeLists.txt file.Oscar Fuentes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125968 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Add VirtRegMap::rewrite() and use it in the new register allocators.Jakob Stoklund Olesen
The rewriter works almost identically to -rewriter=trivial, except it also eliminates any identity copies. This makes the new register allocators independent of VirtRegRewriter.cpp which will be going away at the same time as RegAllocLinearScan. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125967 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18introduce a new TargetLibraryInfo pass, which transformations can use toChris Lattner
query about available library functions. For now this just has memset_pattern16, which exists on darwin, but it can be extended for a bunch of other things in the future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125965 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Reapply r114997 now that the buildbots have been updated.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125960 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Fix style and a typoBruno Cardoso Lopes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125949 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Add assembly parsing support for "msr" and also fix its encoding. Also addBruno Cardoso Lopes
testcases for the disassembler to make sure it still works for "msr". git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125948 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18improve support for OpenBSD, patch by Amit Kulkarni!Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125943 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Expose getTypeName to the C API. Patch by Patrick Walton.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125845 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Add some transforms of the kind X-Y>X -> 0>Y which are valid when there is noDuncan Sands
overflow. These subsume some existing equality transforms, so zap those. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125843 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18add a poor division by constant case.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125832 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Roll out r125794 to help diagnose the llvm-gcc-i386-linux-selfhost failure.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125830 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18prevent jump threading from merging blocks when their address isChris Lattner
taken (and used!). This prevents merging the blocks (invalidating the block addresses) in a case like this: #define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; }) void foo() { printf("%p\n", _THIS_IP_); printf("%p\n", _THIS_IP_); printf("%p\n", _THIS_IP_); } which fixes PR4151. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125829 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18hoist GlobalValue::removeDeadConstantUsers up to being a method on Constant.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125828 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Don't unroll loops whose header block's address is taken.Chris Lattner
This is part of a futile attempt to not "break" bizzaro code like this: l1: printf("l1: %p\n", &&l1); ++x; if( x < 3 ) goto l1; Previously we'd fold &&l1 to 1, which is fine per our semantics but not helpful to the user. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125827 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Recognize monitor/mwait with explicit register argumentsJoerg Sonnenberger
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125805 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Check the errorcode.Argyrios Kyrtzidis
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125804 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Trim debugging output.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125802 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-17Recognize leavel and leaveq aliases for leave.Joerg Sonnenberger
Validate encoding of leave in 64bit mode. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125795 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-17Do not lose debug info of an inlined function argument even if the argument ↵Devang Patel
is only used through GEPs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125794 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-17have instcombine preserve nsw/nuw/exact when sinkingChris Lattner
common operations through a phi. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125790 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-17Add basic register allocator statistics.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125789 91177308-0d34-0410-b5e6-96231b3b80d8
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