Implement another D-specific pass: -dgc2stack This one promotes GC allocations to stack memory when it can determine it's safe to do so. Not all GC calls are recognized yet (in fact only one *is* recognized for now). Needs metadata, so disabled for LLVM versions that don't support it.

#ifndef LDC_PASSES_H
#define LDC_PASSES_H

namespace llvm {
    class FunctionPass;
}

// Performs simplifications on runtime calls.
llvm::FunctionPass* createSimplifyDRuntimeCalls();
llvm::FunctionPass* createGarbageCollect2Stack();


#endif