Duncan P. N. Exon Smith 4f897091e4 libLTO: Allow linker to choose context of modules and codegen ... Add API for specifying which `LLVMContext` each `lto_module_t` and `lto_code_gen_t` is in. In particular, this enables the following flow: for (auto &File : Files) { lto_module_t M = lto_module_create_in_local_context(File...); querySymbols(M); lto_module_dispose(M); } lto_code_gen_t CG = lto_codegen_create_in_local_context(); for (auto &File : FilesToLink) { lto_module_t M = lto_module_create_in_codegen_context(File..., CG); lto_codegen_add_module(CG, M); lto_module_dispose(M); } lto_codegen_compile(CG); lto_codegen_write_merged_modules(CG, ...); lto_codegen_dispose(CG); This flow has a few benefits. - Only one module (two if you count the combined module in the code generator) is in memory at a time. - Metadata (and constants) from files that are parsed to query symbols but not linked into the code generator don't pollute the global context. - The first for loop can be parallelized, since each module is in its own context. - When the code generator is disposed, the memory from LTO gets freed. rdar://problem/18767512 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221733 91177308-0d34-0410-b5e6-96231b3b80d8		2014-11-11 23:19:23 +00:00
..
Transforms
Analysis.h
BitReader.h
BitWriter.h
Core.h
Disassembler.h
ExecutionEngine.h
Initialization.h
IRReader.h
Linker.h
LinkTimeOptimizer.h
lto.h	libLTO: Allow linker to choose context of modules and codegen	2014-11-11 23:19:23 +00:00
module.modulemap
Object.h
Support.h
Target.h
TargetMachine.h