on darwin<10, fallback to .weak_definition (PPC,X86)

.weak_def_can_be_hidden was not yet supported by the system assembler

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196970 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 12 insertions, 3 deletions

diff --git a/lib/Target/PowerPC/MCTargetDesc/PPCMCAsmInfo.cpp b/lib/Target/PowerPC/MCTargetDesc/PPCMCAsmInfo.cpp
index a0b20ed792..e2f84ba10b 100644
--- a/lib/Target/PowerPC/MCTargetDesc/PPCMCAsmInfo.cpp
+++ b/lib/Target/PowerPC/MCTargetDesc/PPCMCAsmInfo.cpp
@@ -12,11 +12,13 @@
 //===----------------------------------------------------------------------===//
 
 #include "PPCMCAsmInfo.h"
+#include "llvm/ADT/Triple.h"
+
 using namespace llvm;
 
 void PPCMCAsmInfoDarwin::anchor() { }
 
-PPCMCAsmInfoDarwin::PPCMCAsmInfoDarwin(bool is64Bit) {
+PPCMCAsmInfoDarwin::PPCMCAsmInfoDarwin(bool is64Bit, const Triple& T) {
   if (is64Bit) {
     PointerSize = CalleeSaveStackSlotSize = 8;
   }
@@ -30,6 +32,12 @@ PPCMCAsmInfoDarwin::PPCMCAsmInfoDarwin(bool is64Bit) {
 
   AssemblerDialect = 1;           // New-Style mnemonics.
   SupportsDebugInformation= true; // Debug information.
+
+  // old assembler lacks some directives
+  // FIXME: this should really be a check on the assembler characteristics
+  // rather than OS version
+  if (T.isMacOSX() && T.isMacOSXVersionLT(10, 6))
+    HasWeakDefCanBeHiddenDirective = false;
 }
 
 void PPCLinuxMCAsmInfo::anchor() { }
diff --git a/lib/Target/PowerPC/MCTargetDesc/PPCMCAsmInfo.h b/lib/Target/PowerPC/MCTargetDesc/PPCMCAsmInfo.h
index 1530e774cf..6e6152eab3 100644
--- a/lib/Target/PowerPC/MCTargetDesc/PPCMCAsmInfo.h
+++ b/lib/Target/PowerPC/MCTargetDesc/PPCMCAsmInfo.h
@@ -18,11 +18,12 @@
 #include "llvm/MC/MCAsmInfoELF.h"
 
 namespace llvm {
+class Triple;
 
   class PPCMCAsmInfoDarwin : public MCAsmInfoDarwin {
     virtual void anchor();
   public:
-    explicit PPCMCAsmInfoDarwin(bool is64Bit);
+    explicit PPCMCAsmInfoDarwin(bool is64Bit, const Triple&);
   };
 
   class PPCLinuxMCAsmInfo : public MCAsmInfoELF {
diff --git a/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp b/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp
index f18d095c6d..6a50518401 100644
--- a/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp
+++ b/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp
@@ -72,7 +72,7 @@ static MCAsmInfo *createPPCMCAsmInfo(const MCRegisterInfo &MRI, StringRef TT) {
 
   MCAsmInfo *MAI;
   if (TheTriple.isOSDarwin())
-    MAI = new PPCMCAsmInfoDarwin(isPPC64);
+    MAI = new PPCMCAsmInfoDarwin(isPPC64, TheTriple);
   else
     MAI = new PPCLinuxMCAsmInfo(isPPC64);