Object, LTO: Add target triple to irsymtab and LTO API.

Start using it in LLD to avoid needing to read bitcode again just to get the
target triple, and in llvm-lto2 to avoid printing symbol table information
that is inappropriate for the target.

Differential Revision: https://reviews.llvm.org/D32038

llvm-svn: 300300

2 files changed, 2 insertions, 0 deletions

diff --git a/llvm/lib/LTO/LTO.cpp b/llvm/lib/LTO/LTO.cpp
index e6fc8cc8853..9782c898bf5 100644
--- a/llvm/lib/LTO/LTO.cpp
+++ b/llvm/lib/LTO/LTO.cpp
@@ -351,6 +351,7 @@ Expected<std::unique_ptr<InputFile>> InputFile::create(MemoryBufferRef Object) {
 
   irsymtab::Reader R({Symtab.data(), Symtab.size()},
                      {File->Strtab.data(), File->Strtab.size()});
+  File->TargetTriple = R.getTargetTriple();
   File->SourceFileName = R.getSourceFileName();
   File->COFFLinkerOpts = R.getCOFFLinkerOpts();
   File->ComdatTable = R.getComdatTable();
diff --git a/llvm/lib/Object/IRSymtab.cpp b/llvm/lib/Object/IRSymtab.cpp
index f78b84b388a..da1ef9946b5 100644
--- a/llvm/lib/Object/IRSymtab.cpp
+++ b/llvm/lib/Object/IRSymtab.cpp
@@ -190,6 +190,7 @@ Error Builder::build(ArrayRef<Module *> IRMods) {
   storage::Header Hdr;
 
   assert(!IRMods.empty());
+  setStr(Hdr.TargetTriple, IRMods[0]->getTargetTriple());
   setStr(Hdr.SourceFileName, IRMods[0]->getSourceFileName());
   TT = Triple(IRMods[0]->getTargetTriple());