Adds explicit narrowing casts to JITLinkMemoryManager.cpp. Honors -slab-address option in llvm-jitlink.cpp, which was accidentally dropped in the refactor. This effectively reverts commit 6641d29b70993bce6dbd7e0e0f1040753d38842f.
Adds explicit narrowing casts to JITLinkMemoryManager.cpp. Honors -slab-address option in llvm-jitlink.cpp, which was accidentally dropped in the refactor. This effectively reverts commit 6641d29b70993bce6dbd7e0e0f1040753d38842f.