Darwin: Add assembler directives to create version-min load commands.

Allow object files to be tagged with a version-min load command for iOS
or MacOSX.

Teach macho-dump to understand the version-min load commands for
testcases.

rdar://11337778

llvm-svn: 204190

1 files changed, 7 insertions, 0 deletions

diff --git a/llvm/lib/MC/MCMachOStreamer.cpp b/llvm/lib/MC/MCMachOStreamer.cpp
index fef7b6bd70b..c932c3c375a 100644
--- a/llvm/lib/MC/MCMachOStreamer.cpp
+++ b/llvm/lib/MC/MCMachOStreamer.cpp
@@ -49,6 +49,8 @@ public:
   void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
   void EmitLinkerOptions(ArrayRef<std::string> Options) override;
   void EmitDataRegion(MCDataRegionType Kind) override;
+  void EmitVersionMin(MCVersionMinType Kind, unsigned Major,
+                      unsigned Minor, unsigned Update) override;
   void EmitThumbFunc(MCSymbol *Func) override;
   bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
   void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override;
@@ -193,6 +195,11 @@ void MCMachOStreamer::EmitDataRegion(MCDataRegionType Kind) {
   }
 }
 
+void MCMachOStreamer::EmitVersionMin(MCVersionMinType Kind, unsigned Major,
+                                     unsigned Minor, unsigned Update) {
+  getAssembler().setVersionMinInfo(Kind, Major, Minor, Update);
+}
+
 void MCMachOStreamer::EmitThumbFunc(MCSymbol *Symbol) {
   // Remember that the function is a thumb function. Fixup and relocation
   // values will need adjusted.