64 bit pointers in RV32 using custom load/store in different address space.

Getting Started

Start with cloning the llvm-project

$ git clone https://github.com/llvm/llvm-project.git -b llvmorg-8.0.0 

Replace the RISCV target backend with our fork

$ cd llvm-project/llvm/lib/Target
$ rm -rf RISCV
$ git clone this-repo

Update the updated data layout string to "e-m:e-p:32:32-p:64:32-i64:64-n32-S128" in clang to match the backend here

Build LLVM with Clang, till version 8.x RISCV was an experimental target!

$ cd llvm-project
$ mkdir build & cd build
$ cmake -DLLVM_ENABLE_PROJECTS=clang  -DCMAKE_BUILD_TYPE=Debug -DLLVM_TARGETS_TO_BUILD="X86" -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD="RISCV" -DLLVM_USE_LINKER=gold -DLLVM_ENABLE_Z3_SOLVER=OFF ../llvm
$ make 

All the approaches that we tried!