Commit Graph

5 Commits

Author SHA1 Message Date
Teresa Johnson
474ca56a69 Change split code gen to use ThreadPool
Part of D15390.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262719 91177308-0d34-0410-b5e6-96231b3b80d8
2016-03-04 15:39:13 +00:00
Sergei Larin
72b0e155fd Add to the split module utility an SCC based method which allows not to globalize any local variables.
Summary:
    Currently llvm::SplitModule as the first step globalizes all local objects, which might not be desirable in some scenarios.
    This change adds a new flag to llvm::SplitModule that uses SCC approach to search for a balanced partition without the need to externalize symbols.
    Such partition might not be possible or fully balanced for a given number of partitions, and is a function of the module properties (global/local dependencies within the module).
    
    Joint development Tobias Edler von Koch (tobias@codeaurora.org) and Sergei Larin (slarin@codeaurora.org)
    
    Subscribers: llvm-commits, joker.eph
    
    Differential Revision: http://reviews.llvm.org/D16124



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@258083 91177308-0d34-0410-b5e6-96231b3b80d8
2016-01-18 21:07:13 +00:00
Tobias Edler von Koch
5b01c01496 [LTO] Add option to emit assembly from LTOCodeGenerator
This adds a new API, LTOCodeGenerator::setFileType, to choose the output file
format for LTO CodeGen. A corresponding change to use this new API from
llvm-lto and a test case is coming in a separate commit.

Differential Revision: http://reviews.llvm.org/D14554



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@253622 91177308-0d34-0410-b5e6-96231b3b80d8
2015-11-19 23:59:24 +00:00
Peter Collingbourne
ae55d356be Support: Support LLVM_ENABLE_THREADS=0 in llvm/Support/thread.h.
Specifically, the header now provides llvm::thread, which is either a
typedef of std::thread or a replacement that calls the function synchronously
depending on the value of LLVM_ENABLE_THREADS.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246402 91177308-0d34-0410-b5e6-96231b3b80d8
2015-08-31 00:09:01 +00:00
Peter Collingbourne
daf6885fa4 CodeGen: Introduce splitCodeGen and teach LTOCodeGenerator to use it.
llvm::splitCodeGen is a function that implements the core of parallel LTO
code generation. It uses llvm::SplitModule to split the module into linkable
partitions and spawning one code generation thread per partition. The function
produces multiple object files which can be linked in the usual way.

This has been threaded through to LTOCodeGenerator (and llvm-lto for testing
purposes). Separate patches will add parallel LTO support to the gold plugin
and lld.

Differential Revision: http://reviews.llvm.org/D12260

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246236 91177308-0d34-0410-b5e6-96231b3b80d8
2015-08-27 23:37:36 +00:00