RFC: IRBuilder shark + llvm2.6svn LLVMContext api change + shark mm

[Xerxes Rånby]

This patch fixes the following build errors:

/home/xerxes/icedtea6/openjdk-ecj/hotspot/src/share/vm/shark/sharkBuilder.cpp:
In constructor 'SharkBuilder::SharkBuilder(SharkCompiler*)':
/home/xerxes/icedtea6/openjdk-ecj/hotspot/src/share/vm/shark/sharkBuilder.cpp:65:
error: no matching function for call to 'llvm::IRBuilder<true,
llvm::ConstantFolder>::IRBuilder()'
/usr/local/include/llvm/Support/IRBuilder.h:56: note: candidates are:
llvm::IRBuilder<preserveNames, T>::IRBuilder(llvm::BasicBlock*,
llvm::ilist_iterator<llvm::Instruction>, const T&) [with bool
preserveNames = true, T = llvm::ConstantFolder]
/usr/local/include/llvm/Support/IRBuilder.h:51: note:                
llvm::IRBuilder<preserveNames, T>::IRBuilder(llvm::BasicBlock*, const
T&) [with bool preserveNames = true, T = llvm::ConstantFolder]
/usr/local/include/llvm/Support/IRBuilder.h:48: note:                
llvm::IRBuilder<preserveNames, T>::IRBuilder(llvm::LLVMContext&, const
T&) [with bool preserveNames = true, T = llvm::ConstantFolder]
/usr/local/include/llvm/Support/IRBuilder.h:42: note:                
llvm::IRBuilder<true, llvm::ConstantFolder>::IRBuilder(const
llvm::IRBuilder<true, llvm::ConstantFolder>&)
make[7]: *** [sharkBuilder.o] Error 1

and

/home/xerxes/icedtea6/openjdk-ecj/hotspot/src/share/vm/shark/sharkCompiler.cpp:
In constructor 'SharkCompiler::SharkCompiler()':
/home/xerxes/icedtea6/openjdk-ecj/hotspot/src/share/vm/shark/sharkCompiler.cpp:67:
error: cannot allocate an object of abstract type 'SharkMemoryManager'
/home/xerxes/icedtea6/openjdk-ecj/hotspot/src/share/vm/shark/sharkMemoryManager.hpp:30:
note:   because the following virtual functions are pure within
'SharkMemoryManager':
/usr/local/include/llvm/ExecutionEngine/JITMemoryManager.h:50: note:   
virtual void llvm::JITMemoryManager::setPoisonMemory(bool)
/usr/local/include/llvm/ExecutionEngine/JITMemoryManager.h:125: note:  
virtual uint8_t* llvm::JITMemoryManager::allocateGlobal(uintptr_t,
unsigned int)

with this patch it builds fine but...

I have had a bit trouble running shark using the latest llvm svn tip. r75126
got segfaults compiling string::indexOf on ia32

Cheers
Xerxes
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