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A virtual instruction set - LLVM is a low-level object code representation that uses simple RISC-like instructions, but provides rich, language-independent, type information and dataflow (SSA) information about operands. This combination enables sophisticated transformations on object code, while remaining light-weight enough to be attached to the executable. This combination is key to allowing link-time, run-time, and offline transformations. 3. A compiler infrastructure - LLVM is also a collection of source code that implements the language and compilation strategy. The primary components of the LLVM infrastructure are a GCC-based C and C++ front-end, a link-time optimization framework with a growing set of global and interprocedural analyses and transformations, static back-ends for many popular (and some obscure) architectures, a back-end which emits portable C code, and a Just-In-Time compilers for several architectures. 4. LLVM does not imply things that you would expect from a high-level virtual machine. It does not require garbage collection or run-time code generation (In fact, LLVM makes a great static compiler!). Note that optional LLVM components can be used to build high-level virtual machines and other systems that need these services."}],"repos":[{"branch":"master","lastcommit":"f87ce2b74421571078063820dc1065e7089c9fa7","name":"gentoo","path":"\/usr\/portage","repoid":1,"upstream":"origin"}],"tracked":false,"urls":["https:\/\/ghdl.github.io\/ghdl\/","https:\/\/github.com\/ghdl\/ghdl\/"],"uses":[{"description":"Build LLVM code generator","isdefault":false,"packageid":76332,"use":"llvm"},{"defaultflag":true,"description":"Build static versions of dynamic libraries as well","isdefault":true,"use":"static-libs"},{"description":"Compile with sys-devel\/gcc:12","group":"ada_target","isdefault":false,"use":"gcc_12"},{"description":"Compile with sys-devel\/gcc:13","group":"ada_target","isdefault":false,"use":"gcc_13"},{"description":"Compile with sys-devel\/gcc:14","group":"ada_target","isdefault":false,"use":"gcc_14"},{"description":"Compile with sys-devel\/gcc:15","group":"ada_target","isdefault":false,"use":"gcc_15"},{"description":"Compile with sys-devel\/gcc:16","group":"ada_target","isdefault":false,"use":"gcc_16"},{"description":"Use LLVM 19.","group":"llvm_slot","isdefault":false,"use":"19"},{"defaultflag":true,"description":"Use LLVM 20.","group":"llvm_slot","isdefault":true,"use":"20"},{"description":"Use LLVM 20.","group":"llvm_slot","isdefault":false,"use":"20"},{"defaultflag":true,"description":"Use LLVM 21.","group":"llvm_slot","isdefault":true,"use":"21"},{"description":"Use LLVM 22.","group":"llvm_slot","isdefault":false,"use":"22"}]}