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5 Commits

Author SHA1 Message Date
Bob Haarman dd4b4325ee [coff] default to multiple parallel ThinLTO jobs 
Summary:
lld-link allows the number of parallel ThinLTO jobs to be specified
using /opt:lldltojobs=N. If left unspecified, the implementation
conservatively defaults to 1. This leads to very long link times. This
change makes it so that the default is to automatically set the
parallelism, as we do in the ELF linker.

Reviewers: ruiu, hans

Reviewed By: ruiu, hans

Subscribers: pcc, mehdi_amini, Prazek, llvm-commits

Differential Revision: https://reviews.llvm.org/D31986

llvm-svn: 300089
 2017-04-12 18:36:13 +00:00
Peter Collingbourne 0d56b959ad LTO: Replace InputFile::Symbol::getFlags() with predicate accessors. NFC. 
This makes the predicates independent of the flag representation
and makes the code a little easier to read.

llvm-svn: 298951
 2017-03-28 22:31:35 +00:00
Bob Haarman 69b196dd91 [COFF] added support for /lldsavetemps 
Summary: This adds an option to save temporary files generated during link-time optimization. This can be useful for debugging.

Reviewers: ruiu, pcc

Reviewed By: ruiu, pcc

Subscribers: mehdi_amini

Differential Revision: https://reviews.llvm.org/D29518

llvm-svn: 294498
 2017-02-08 18:36:41 +00:00
Rui Ueyama 1e0b158dbd Add an option to use the MSVC linker to link LTO-generated object files. 
This patch defines a new command line option, /MSVCLTO, to LLD.
If that option is given, LLD invokes link.exe to link LTO-generated
object files. This is hacky but useful because link.exe can create
PDB files.

Differential Revision: https://reviews.llvm.org/D29526

llvm-svn: 294234
 2017-02-06 20:47:55 +00:00
Bob Haarman cde5e5b600 refactor COFF linker to use new LTO API 
Summary: The COFF linker previously implemented link-time optimization using an API which has now been marked as legacy. This change refactors the COFF linker to use the new LTO API, which is also used by the ELF linker.

Reviewers: pcc, ruiu

Reviewed By: pcc

Subscribers: mgorny, mehdi_amini

Differential Revision: https://reviews.llvm.org/D29059

llvm-svn: 293967
 2017-02-02 23:58:14 +00:00