[lto] Record whether a variable is TLS.

Summary:

Reviewers: rafael

Subscribers: Bigcheese, llvm-commits, joker.eph

Differential Revision: http://reviews.llvm.org/D17974

llvm-svn: 262975

lld/ELF/InputFiles.cpp

@@ -465,6 +465,7 @@ void BitcodeFile::parse(DenseSet<StringRef> &ComdatGroups) {
     } else {
       Body = new (Alloc) DefinedBitcode(NameRef, IsWeak, Visibility);
     }
+    Body->IsTls = GV->isThreadLocal();
     SymbolBodies.push_back(Body);
   }
 }

lld/test/ELF/lto/Inputs/tls-mixed.s

@@ -0,0 +1,4 @@
+.globl foo
+.section .tbss,"awT",@nobits
+foo:
+.long 0

lld/test/ELF/lto/tls-mixed.ll

@@ -0,0 +1,10 @@
+; REQUIRES: x86
+; RUN: llvm-as %s -o %t1.o
+; RUN: llvm-mc %p/Inputs/tls-mixed.s -o %t2.o -filetype=obj -triple=x86_64-pc-linux
+; RUN: ld.lld -m elf_x86_64 %t1.o %t2.o -o %t.so -shared
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; Should not encounter TLS-ness mismatch for @foo
+@foo = external thread_local global i32, align 4