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path: root/include/llvm/Bitcode/BitstreamReader.h
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2013-04-01Whitespace cleanupJoe Abbey
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178454 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-13use memcpy instead of dubious union to type pun two values,Chris Lattner
thanks to David Blaike for pointing this out. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175032 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-10ok, ok, stop fighting type punning warnings by just using a union.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174827 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-10hopefully "really" fix a type punning warning by defining the buffer asChris Lattner
type char, which can't have TBAA tags. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174826 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-10attempt to defeat a gcc warning that is breaking a -Werror buildbot.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174825 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-09This is the correct version of r174802.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174804 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-09Fix a nasty off-by one error that only manifests with 64-bit word size (which isChris Lattner
not enabled yet). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174803 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-09Fix the underlying problem that was causing read(0) to be called: sometimes theChris Lattner
bitcode writer would generate abbrev records saying that the abbrev should be filled with fixed zero-bit bitfields (this happens in the .bc writer when the number of types used in a module is exactly one, since log2(1) == 0). In this case, just handle it as a literal zero. We can't "just fix" the writer without breaking compatibility with existing bc files, so have the abbrev reader do the substitution. Strengthen the assert in read to reject reads of zero bits so we catch such crimes in the future, and remove the special case designed to handle this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174801 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-09recommit r173072 (preparing bitstream reader to read a machine word at a time,Chris Lattner
instead of always 32-bits at a time) with two changes: 1. Make Read(0) always return zero without affecting the state of our cursor. 2. Hack word_t to always be 32 bits, as staging. These two caveats will change shortly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174800 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-21r173072 is causing some regressions on big endian hosts, I don't have time ↵Chris Lattner
to debug it so revert it for now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173074 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-21rework the Bitstream reader to actually work a machine word at a time, ↵Chris Lattner
instead of 32-bits at a time. This cuts in half the number of virtual methods called to refill that word when compiling on a 64-bit host, and will make 64-bit read operations faster. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173072 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-21Fix a heinous inefficiency introduced in r149918, wherein reading each byte of aChris Lattner
BLOB (i.e., large, performance intensive data) in a bitcode file was switched to invoking one virtual method call per byte read. Now we do one virtual call per BLOB. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173065 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-21rename "SkipToWord" to "SkipToFourByteBoundary" since a word is not always 4 ↵Chris Lattner
bytes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173062 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-20trivial micro-optimization: lazily call the virtual method instead of ↵Chris Lattner
eagerly calling it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172953 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-20switch llvm-bcanalyzer onto the new cursor APIs, allowing deletion ofChris Lattner
the old ReadRecord methods. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172952 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-20add an option to not auto-process abbreviations in advance()Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172946 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-20stringref'ize readRecord and properly capitalize it. Add a compatibility ↵Chris Lattner
method to easy the transition. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172940 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-20move some private methods out of line, add a skipRecord() method.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172931 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-19add some optional flags to affect the way advance works.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172928 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-19Add a new BitstreamEntry concept, and add two helper methods for walkingChris Lattner
through a BitstreamCursor that produce it: advance() and advanceSkippingSubblocks(), representing the two most common ways clients want to walk through bitcode. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172919 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-19BitstreamReader hasn't aged well. It's been hacked on by various people andChris Lattner
has past the point of making sense. Lets tidy things up: first step, moving a ton of big functions out of line. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172904 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-10Fix include guards so they exactly match file names.Jakub Staszak
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172025 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-25Code Custodian:Joe Abbey
- Widespread trailing space removal - A dash of OCD spacing to block align enums - joined a line that probably needed 80 cols a while back git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168566 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-11Change encoding of instruction operands in bitcode binaries to be relativeJan Wen Voung
to the instruction position. The old encoding would give an absolute ID which counts up within a function, and only resets at the next function. I.e., Instead of having: ... = icmp eq i32 n-1, n-2 br i1 ..., label %bb1, label %bb2 it will now be roughly: ... = icmp eq i32 1, 2 br i1 1, label %bb1, label %bb2 This makes it so that ids remain relatively small and can be encoded in fewer bits. With this encoding, forward reference operands will be given negative-valued IDs. Use signed VBRs for the most common case of forward references, which is phi instructions. To retain backward compatibility we bump the bitcode version from 0 to 1 to distinguish between the different encodings. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165739 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-17Mark unimplemented copy constructors and copy assignment operators as ↵Craig Topper
LLVM_DELETED_FUNCTION. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164017 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-07Bitcode/BitstreamReader.h: Tweak for big endian hosts.NAKAMURA Takumi
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149980 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-06System headers after llvm headers.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149919 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-06Enable streaming of bitcodeDerek Schuff
This CL delays reading of function bodies from initial parse until materialization, allowing overlap of compilation with bitcode download. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149918 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-05Convert assert(0) to llvm_unreachableCraig Topper
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149849 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-09fix a really bad bug that would cause nested cursors to break,Chris Lattner
used by the new bitcode reader. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134821 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-25Enhance the sanity check for block sizes; check that the resulting pointer isNick Lewycky
pointing to the range [first character, last character] instead of just not after the last character. Patch by Yan Ivnitskiy! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133867 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-27Clean up the minor mess I caused with removing iterator.h. I shall take care ↵Gabor Greif
of 80-col violations and the FIXME later. (Thanks goodness that I live in another continent, so the monkeypox did not strike me :-) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80224 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-07fix some type confusion in ReadVBR64: "Piece" should be only 32 bits,Chris Lattner
not 64, because we read at most 32 bits at a time. OTOH, "Result" must be 64-bits and insertion into it must be 64-bit clean. Thanks to Ivan Sorokin for bringing this up. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74932 91177308-0d34-0410-b5e6-96231b3b80d8
2009-06-29Fix three MSVC 2008 warnings that completely clutter the build output.Sebastian Redl
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74430 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-27give bitstreamreader an API to ignore names for blocks/records,Chris Lattner
only llvm-bcanalyzer wants this info. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70239 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-26Add two new record types to the blockinfo block:Chris Lattner
BLOCKNAME and SETRECORDNAME. This allows a bitcode file to be self describing with pretty names for records and blocks in addition to numbers. This enhances llvm-bcanalyzer to use this to print prettily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70165 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-26make BitstreamCursor's copyable and assignable.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70159 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-26Make a major API change to BitstreamReader: split all the readingChris Lattner
state out of the BitstreamReader class into a BitstreamCursor class. Doing this allows the client to have multiple cursors into the same file, each with potentially different live block stacks and abbreviation records. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70157 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-15Allow jumping to the end of a bitstream while readingDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69145 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-08Fix BitstreamReader's GetCurrentBitNo to return the correct bit number, and ↵Douglas Gregor
stop JumpToBit from covering up its mistakes git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68648 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-07Add an API for the bitstream reader to read blobs and returnChris Lattner
them by reference, instead of packing each byte into a smallvector. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68486 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-06allow clients to look up abbrev id'sChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68471 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-06add a new Blob encoding abbreviation for bitcode files that emitsChris Lattner
elements in a form that is efficient for the reader to just get a pointer in memory and start reading. APIs to do efficient reading and writing are still todo. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68465 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-06split ReadAbbreviatedLiteral out of ReadAbbreviatedField.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68463 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-06reduce indentation with early-outChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68462 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-01Use CHAR_BIT instead of hard-coding 8 in several places where itDan Gohman
is appropriate. This helps visually differentiate host-oriented calculations from target-oriented calculations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68227 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-20Removed trailing whitespace.Misha Brukman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65199 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-05Fix more -Wshorten-64-to-32 warnings.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50659 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-29Don't attribute in file headers anymore. See llvmdev for theChris Lattner
discussion of this change. Boy are my fingers tired. ;-) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45411 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-30Fixed potential bug where CurWord is not zeroed out in JumpToBit.Ted Kremenek
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44469 91177308-0d34-0410-b5e6-96231b3b80d8
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