From 95856128766cf3bd5cda843f70616554666515aa Mon Sep 17 00:00:00 2001
From: Daniel Dunbar <daniel@zuster.org>
Date: Fri, 18 Jan 2013 19:37:00 +0000
Subject: [MC/Mach-O] Implement integrated assembler support for linker
 options.  - Also, fixup syntax errors in LangRef and missing newline in the
 MCAsmStreamer.

llvm-svn: 172837
---
 llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp | 33 ++++++++++++++++++-----
 1 file changed, 26 insertions(+), 7 deletions(-)

(limited to 'llvm/lib/CodeGen')

diff --git a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index 76c254682f0..1170bf26563 100644
--- a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -406,14 +406,14 @@ TargetLoweringObjectFileELF::InitializeELF(bool UseInitArray_) {
 //                                 MachO
 //===----------------------------------------------------------------------===//
 
-/// emitModuleFlags - Emit the module flags that specify the garbage collection
-/// information.
+/// emitModuleFlags - Perform code emission for module flags.
 void TargetLoweringObjectFileMachO::
 emitModuleFlags(MCStreamer &Streamer,
                 ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
                 Mangler *Mang, const TargetMachine &TM) const {
   unsigned VersionVal = 0;
   unsigned ImageInfoFlags = 0;
+  MDNode *LinkerOptions = 0;
   StringRef SectionVal;
 
   for (ArrayRef<Module::ModuleFlagEntry>::iterator
@@ -427,14 +427,33 @@ emitModuleFlags(MCStreamer &Streamer,
     StringRef Key = MFE.Key->getString();
     Value *Val = MFE.Val;
 
-    if (Key == "Objective-C Image Info Version")
+    if (Key == "Objective-C Image Info Version") {
       VersionVal = cast<ConstantInt>(Val)->getZExtValue();
-    else if (Key == "Objective-C Garbage Collection" ||
-             Key == "Objective-C GC Only" ||
-             Key == "Objective-C Is Simulated")
+    } else if (Key == "Objective-C Garbage Collection" ||
+               Key == "Objective-C GC Only" ||
+               Key == "Objective-C Is Simulated") {
       ImageInfoFlags |= cast<ConstantInt>(Val)->getZExtValue();
-    else if (Key == "Objective-C Image Info Section")
+    } else if (Key == "Objective-C Image Info Section") {
       SectionVal = cast<MDString>(Val)->getString();
+    } else if (Key == "Linker Options") {
+      LinkerOptions = cast<MDNode>(Val);
+    }
+  }
+
+  // Emit the linker options if present.
+  if (LinkerOptions) {
+    for (unsigned i = 0, e = LinkerOptions->getNumOperands(); i != e; ++i) {
+      MDNode *MDOptions = cast<MDNode>(LinkerOptions->getOperand(i));
+      SmallVector<std::string, 4> StrOptions;
+
+      // Convert to strings.
+      for (unsigned ii = 0, ie = MDOptions->getNumOperands(); ii != ie; ++ii) {
+        MDString *MDOption = cast<MDString>(MDOptions->getOperand(ii));
+        StrOptions.push_back(MDOption->getString());
+      }
+
+      Streamer.EmitLinkerOptions(StrOptions);
+    }
   }
 
   // The section is mandatory. If we don't have it, then we don't have GC info.
-- 
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