[CodeGen] Add support for emitting .init_array instead of .ctors on FreeBSD.

PR: 30494
llvm-svn: 282451

3 files changed, 15 insertions, 0 deletions

diff --git a/llvm/lib/Target/X86/X86TargetMachine.cpp b/llvm/lib/Target/X86/X86TargetMachine.cpp
index cd48211dbab..c92f9d88016 100644
--- a/llvm/lib/Target/X86/X86TargetMachine.cpp
+++ b/llvm/lib/Target/X86/X86TargetMachine.cpp
@@ -50,6 +50,8 @@ static std::unique_ptr<TargetLoweringObjectFile> createTLOF(const Triple &TT) {
     return make_unique<TargetLoweringObjectFileMachO>();
   }
 
+  if (TT.isOSFreeBSD())
+    return make_unique<X86FreeBSDTargetObjectFile>();
   if (TT.isOSLinux() || TT.isOSNaCl())
     return make_unique<X86LinuxNaClTargetObjectFile>();
   if (TT.isOSBinFormatELF())
diff --git a/llvm/lib/Target/X86/X86TargetObjectFile.cpp b/llvm/lib/Target/X86/X86TargetObjectFile.cpp
index f0713286bcc..aa837c3f30c 100644
--- a/llvm/lib/Target/X86/X86TargetObjectFile.cpp
+++ b/llvm/lib/Target/X86/X86TargetObjectFile.cpp
@@ -66,6 +66,13 @@ const MCExpr *X86ELFTargetObjectFile::getDebugThreadLocalSymbol(
 }
 
 void
+X86FreeBSDTargetObjectFile::Initialize(MCContext &Ctx,
+                                       const TargetMachine &TM) {
+  TargetLoweringObjectFileELF::Initialize(Ctx, TM);
+  InitializeELF(TM.Options.UseInitArray);
+}
+
+void
 X86LinuxNaClTargetObjectFile::Initialize(MCContext &Ctx,
                                          const TargetMachine &TM) {
   TargetLoweringObjectFileELF::Initialize(Ctx, TM);
diff --git a/llvm/lib/Target/X86/X86TargetObjectFile.h b/llvm/lib/Target/X86/X86TargetObjectFile.h
index 6b38c0a800b..b57f0bb5016 100644
--- a/llvm/lib/Target/X86/X86TargetObjectFile.h
+++ b/llvm/lib/Target/X86/X86TargetObjectFile.h
@@ -49,6 +49,12 @@ namespace llvm {
     const MCExpr *getDebugThreadLocalSymbol(const MCSymbol *Sym) const override;
   };
 
+  /// X86FreeBSDTargetObjectFile - This implementation is used for FreeBSD
+  /// on x86 and x86-64.
+  class X86FreeBSDTargetObjectFile : public X86ELFTargetObjectFile {
+    void Initialize(MCContext &Ctx, const TargetMachine &TM) override;
+  };
+
   /// X86LinuxNaClTargetObjectFile - This implementation is used for linux and
   /// Native Client on x86 and x86-64.
   class X86LinuxNaClTargetObjectFile : public X86ELFTargetObjectFile {