Pull in r199399 from upstream clang trunk (by Jakob Stoklund Olesen):

  SPARCv9 implements long double as an IEEE quad.

Introduced here: http://svnweb.freebsd.org/changeset/base/262262

Index: tools/clang/test/CodeGen/sparcv9-abi.c
===================================================================
--- tools/clang/test/CodeGen/sparcv9-abi.c
+++ tools/clang/test/CodeGen/sparcv9-abi.c
@@ -18,6 +18,9 @@ long long f_int_3(long long x) { return x; }
 // CHECK-LABEL: define signext i8 @f_int_4(i8 signext %x)
 char f_int_4(char x) { return x; }
 
+// CHECK-LABEL: define fp128 @f_ld(fp128 %x)
+long double f_ld(long double x) { return x; }
+
 // Small structs are passed in registers.
 struct small {
   int *a, *b;
Index: tools/clang/lib/Basic/Targets.cpp
===================================================================
--- tools/clang/lib/Basic/Targets.cpp
+++ tools/clang/lib/Basic/Targets.cpp
@@ -4529,6 +4529,12 @@ class SparcV9TargetInfo : public SparcTargetInfo {
       UIntMaxType = UnsignedLong;
     }
     Int64Type = IntMaxType;
+
+    // The SPARCv8 System V ABI has long double 128-bits in size, but 64-bit
+    // aligned. The SPARCv9 SCD 2.4.1 says 16-byte aligned.
+    LongDoubleWidth = 128;
+    LongDoubleAlign = 128;
+    LongDoubleFormat = &llvm::APFloat::IEEEquad;
   }
 
   virtual void getTargetDefines(const LangOptions &Opts,