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Bitcode: Remove reader support for MODULE_CODE_PURGEVALS. 

Support for writing this module code was removed in r73220, which was well
before the LLVM 3.0 release, so we do not need to be able to understand it
for backwards compatibility.

Differential Revision: https://reviews.llvm.org/D31563

llvm-svn: 299370
This commit is contained in:
Peter Collingbourne 2017-04-03 17:58:48 +00:00
parent 8698fc09de
commit f5af778389
4 changed files with 0 additions and 21 deletions
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10
llvm/docs/BitCodeFormat.rst
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@ -839,16 +839,6 @@ fields are
* *unnamed_addr*: If present, an encoding of the
:ref:`unnamed_addr<bcunnamedaddr>` attribute of this alias
MODULE_CODE_PURGEVALS Record
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
``[PURGEVALS, numvals]``
The ``PURGEVALS`` record (code 10) resets the module-level value list to the
size given by the single operand value. Module-level value list items are added
by ``GLOBALVAR``, ``FUNCTION``, and ``ALIAS`` records. After a ``PURGEVALS``
record is seen, new value indices will start from the given *numvals* value.
.. _MODULE_CODE_GCNAME:
MODULE_CODE_GCNAME Record

3
llvm/include/llvm/Bitcode/LLVMBitCodes.h
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@ -92,9 +92,6 @@ enum ModuleCodes {
// ALIAS: [alias type, aliasee val#, linkage, visibility]
MODULE_CODE_ALIAS_OLD = 9,
// MODULE_CODE_PURGEVALS: [numvals]
MODULE_CODE_PURGEVALS = 10,
MODULE_CODE_GCNAME = 11, // GCNAME: [strchr x N]
MODULE_CODE_COMDAT = 12, // COMDAT: [selection_kind, name]

7
llvm/lib/Bitcode/Reader/BitcodeReader.cpp
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@ -3060,13 +3060,6 @@ Error BitcodeReader::parseModule(uint64_t ResumeBit,
IndirectSymbolInits.push_back(std::make_pair(NewGA, Val));
break;
}
/// MODULE_CODE_PURGEVALS: [numvals]
case bitc::MODULE_CODE_PURGEVALS:
// Trim down the value list to the specified size.
if (Record.size() < 1 || Record[0] > ValueList.size())
return error("Invalid record");
ValueList.shrinkTo(Record[0]);
break;
/// MODULE_CODE_VSTOFFSET: [offset]
case bitc::MODULE_CODE_VSTOFFSET:
if (Record.size() < 1)

1
llvm/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp
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@ -171,7 +171,6 @@ static const char *GetCodeName(unsigned CodeID, unsigned BlockID,
STRINGIFY_CODE(MODULE_CODE, GLOBALVAR)
STRINGIFY_CODE(MODULE_CODE, FUNCTION)
STRINGIFY_CODE(MODULE_CODE, ALIAS)
STRINGIFY_CODE(MODULE_CODE, PURGEVALS)
STRINGIFY_CODE(MODULE_CODE, GCNAME)
STRINGIFY_CODE(MODULE_CODE, VSTOFFSET)
STRINGIFY_CODE(MODULE_CODE, METADATA_VALUES_UNUSED)