[PATCH] D42183: [LLD] [ELF] Pass CPU string to LTO pipeline.

[Pratik Bhatu via Phabricator via llvm-commits]

pbhatu created this revision.
pbhatu added reviewers: ruiu, davide.
Herald added subscribers: llvm-commits, inglorion, emaste.

Previously an empty CPU string was passed to the LTO engine which 
resulted in a generic CPU for which certain features like NOPL
were disabled. This fixes that.


Repository:
  rLLD LLVM Linker

https://reviews.llvm.org/D42183

Files:
  Common/TargetOptionsCommandFlags.cpp
  ELF/LTO.cpp
  include/lld/Common/TargetOptionsCommandFlags.h


Index: include/lld/Common/TargetOptionsCommandFlags.h
===================================================================
--- include/lld/Common/TargetOptionsCommandFlags.h
+++ include/lld/Common/TargetOptionsCommandFlags.h
@@ -18,4 +18,5 @@
 namespace lld {
 llvm::TargetOptions InitTargetOptionsFromCodeGenFlags();
 llvm::Optional<llvm::CodeModel::Model> GetCodeModelFromCMModel();
+std::string GetCPUStr();
 }
Index: ELF/LTO.cpp
===================================================================
--- ELF/LTO.cpp
+++ ELF/LTO.cpp
@@ -87,6 +87,7 @@
   Conf.DisableVerify = Config->DisableVerify;
   Conf.DiagHandler = diagnosticHandler;
   Conf.OptLevel = Config->LTOO;
+  Conf.CPU = GetCPUStr();
 
   // Set up a custom pipeline if we've been asked to.
   Conf.OptPipeline = Config->LTONewPmPasses;
Index: Common/TargetOptionsCommandFlags.cpp
===================================================================
--- Common/TargetOptionsCommandFlags.cpp
+++ Common/TargetOptionsCommandFlags.cpp
@@ -30,3 +30,7 @@
 llvm::Optional<llvm::CodeModel::Model> lld::GetCodeModelFromCMModel() {
   return getCodeModel();
 }
+
+std::string lld::GetCPUStr() {
+  return ::getCPUStr();
+}


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