diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/lib/CodeGen/TargetInfo.cpp
@@ -5030,6 +5030,10 @@
 
   bool initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF,
                                llvm::Value *Address) const override;
+
+  void emitTargetMetadata(CodeGen::CodeGenModule &CGM,
+                          const llvm::MapVector<GlobalDecl, StringRef>
+                              &MangledDeclNames) const override;
 };
 
 class PPC64TargetCodeGenInfo : public DefaultTargetCodeGenInfo {
@@ -5443,6 +5447,22 @@
                                      /*IsAIX*/ false);
 }
 
+void PPC64_SVR4_TargetCodeGenInfo::emitTargetMetadata(
+    CodeGen::CodeGenModule &CGM,
+    const llvm::MapVector<GlobalDecl, StringRef> &MangledDeclNames) const {
+  llvm::LLVMContext &Ctx = CGM.getLLVMContext();
+  const auto *flt = &CGM.getTarget().getLongDoubleFormat();
+  if (flt == &llvm::APFloat::PPCDoubleDouble())
+    CGM.getModule().addModuleFlag(llvm::Module::Error, "float-abi",
+                              llvm::MDString::get(Ctx, "doubledouble"));
+  else if (flt == &llvm::APFloat::IEEEquad())
+    CGM.getModule().addModuleFlag(llvm::Module::Error, "float-abi",
+                              llvm::MDString::get(Ctx, "ieeequad"));
+  else if (flt == &llvm::APFloat::IEEEdouble())
+    CGM.getModule().addModuleFlag(llvm::Module::Error, "float-abi",
+                              llvm::MDString::get(Ctx, "ieeedouble"));
+}
+
 bool
 PPC64TargetCodeGenInfo::initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF,
                                                 llvm::Value *Address) const {
diff --git a/clang/test/CodeGen/ppc64-float-abi-attr.c b/clang/test/CodeGen/ppc64-float-abi-attr.c
new file mode 100644
--- /dev/null
+++ b/clang/test/CodeGen/ppc64-float-abi-attr.c
@@ -0,0 +1,11 @@
+// RUN: %clang_cc1 -triple powerpc64le-unknown-linux-gnu %s -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 -triple powerpc64le-unknown-linux-gnu %s -emit-llvm -mabi=ieeelongdouble -o - | FileCheck %s --check-prefix=IEEE
+// RUN: %clang_cc1 -triple powerpc64le-unknown-linux-gnu %s -emit-llvm -mlong-double-64 -o - | FileCheck %s --check-prefix=LDBL64
+
+long double foo(long double a, long double b) {
+  return a + b;
+}
+
+// CHECK: !{{[0-9]+}} = !{i32 1, !"float-abi", !"doubledouble"}
+// IEEE: !{{[0-9]+}} = !{i32 1, !"float-abi", !"ieeequad"}
+// LDBL64: !{{[0-9]+}} = !{i32 1, !"float-abi", !"ieeedouble"}