[PATCH] Add a jumptable attribute and support for creating jump-instruction tables

[Tom Roeder]

ping.

I could break this up into smaller patches, if that would help.
However, some of these patches wouldn't do much (e.g, a patch that
adds the jumptable attribute but doesn't do anything with it).



On Mon, Apr 21, 2014 at 10:02 AM, Tom Roeder <tmroeder at google.com> wrote:
> Ping
>
> On Fri, Apr 11, 2014 at 3:00 PM, Tom Roeder <tmroeder at google.com> wrote:
>> This patch provides a new jumptable attribute and associated CodeGen support to generate jump-instruction tables and replace function references for jumptable-annotated functions. The work of generating the tables is now done with an IR pass in CodeGen to replace address-taken functions, along with a change to AsmPrinter to generate the assembly for the tables. This is a followup to the discussion on llvmdev. See http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-April/071866.html
>>
>> This version of the patch has support for X86 and ARM backends, along with tests for each.
>>
>> http://reviews.llvm.org/D3361
>>
>> Files:
>>   docs/LangRef.rst
>>   include/llvm/Analysis/JumpInstrTableInfo.h
>>   include/llvm/Analysis/Passes.h
>>   include/llvm/Bitcode/LLVMBitCodes.h
>>   include/llvm/CodeGen/JumpInstrTables.h
>>   include/llvm/CodeGen/Passes.h
>>   include/llvm/IR/Attributes.h
>>   include/llvm/InitializePasses.h
>>   include/llvm/LinkAllPasses.h
>>   include/llvm/Target/TargetInstrInfo.h
>>   lib/Analysis/Analysis.cpp
>>   lib/Analysis/CMakeLists.txt
>>   lib/Analysis/JumpInstrTableInfo.cpp
>>   lib/AsmParser/LLLexer.cpp
>>   lib/AsmParser/LLParser.cpp
>>   lib/AsmParser/LLToken.h
>>   lib/Bitcode/Reader/BitcodeReader.cpp
>>   lib/Bitcode/Writer/BitcodeWriter.cpp
>>   lib/CodeGen/AsmPrinter/AsmPrinter.cpp
>>   lib/CodeGen/CMakeLists.txt
>>   lib/CodeGen/JumpInstrTables.cpp
>>   lib/CodeGen/LLVMTargetMachine.cpp
>>   lib/IR/Attributes.cpp
>>   lib/IR/Verifier.cpp
>>   lib/LTO/LTOCodeGenerator.cpp
>>   lib/Target/ARM/ARMBaseInstrInfo.cpp
>>   lib/Target/ARM/ARMBaseInstrInfo.h
>>   lib/Target/X86/X86InstrInfo.cpp
>>   lib/Target/X86/X86InstrInfo.h
>>   lib/Transforms/IPO/IPO.cpp
>>   test/Bitcode/attributes.ll
>>   test/CodeGen/ARM/jump_tables.ll
>>   test/CodeGen/X86/jump_table_bitcast.ll
>>   test/CodeGen/X86/jump_tables.ll