Index: cfe/trunk/include/clang/Driver/CLCompatOptions.td
===================================================================
--- cfe/trunk/include/clang/Driver/CLCompatOptions.td
+++ cfe/trunk/include/clang/Driver/CLCompatOptions.td
@@ -291,7 +291,6 @@
 def _SLASH_GF : CLIgnoredFlag<"GF">;
 def _SLASH_kernel_ : CLIgnoredFlag<"kernel-">;
 def _SLASH_nologo : CLIgnoredFlag<"nologo">;
-def _SLASH_Ob1 : CLIgnoredFlag<"Ob1">;
 def _SLASH_Og : CLIgnoredFlag<"Og">;
 def _SLASH_openmp_ : CLIgnoredFlag<"openmp-">;
 def _SLASH_RTC : CLIgnoredJoined<"RTC">;
Index: cfe/trunk/include/clang/Driver/Options.td
===================================================================
--- cfe/trunk/include/clang/Driver/Options.td
+++ cfe/trunk/include/clang/Driver/Options.td
@@ -746,7 +746,10 @@
 def fheinous_gnu_extensions : Flag<["-"], "fheinous-gnu-extensions">, Flags<[CC1Option]>;
 def filelist : Separate<["-"], "filelist">, Flags<[LinkerInput]>;
 def : Flag<["-"], "findirect-virtual-calls">, Alias<fapple_kext>;
-def finline_functions : Flag<["-"], "finline-functions">, Group<f_clang_Group>, Flags<[CC1Option]>;
+def finline_functions : Flag<["-"], "finline-functions">, Group<f_clang_Group>, Flags<[CC1Option]>,
+  HelpText<"Inline suitable functions">;
+def finline_hint_functions: Flag<["-"], "finline-hint-functions">, Group<f_clang_Group>, Flags<[CC1Option]>,
+  HelpText<"Inline functions wich are (explicitly or implicitly) marked inline">;
 def finline : Flag<["-"], "finline">, Group<clang_ignored_f_Group>;
 def finput_charset_EQ : Joined<["-"], "finput-charset=">, Group<f_Group>;
 def fexec_charset_EQ : Joined<["-"], "fexec-charset=">, Group<f_Group>;
Index: cfe/trunk/include/clang/Frontend/CodeGenOptions.h
===================================================================
--- cfe/trunk/include/clang/Frontend/CodeGenOptions.h
+++ cfe/trunk/include/clang/Frontend/CodeGenOptions.h
@@ -46,6 +46,7 @@
   enum InliningMethod {
     NoInlining,         // Perform no inlining whatsoever.
     NormalInlining,     // Use the standard function inlining pass.
+    OnlyHintInlining,   // Inline only (implicitly) hinted functions.
     OnlyAlwaysInlining  // Only run the always inlining pass.
   };
 
Index: cfe/trunk/lib/CodeGen/BackendUtil.cpp
===================================================================
--- cfe/trunk/lib/CodeGen/BackendUtil.cpp
+++ cfe/trunk/lib/CodeGen/BackendUtil.cpp
@@ -328,7 +328,8 @@
   switch (Inlining) {
   case CodeGenOptions::NoInlining:
     break;
-  case CodeGenOptions::NormalInlining: {
+  case CodeGenOptions::NormalInlining:
+  case CodeGenOptions::OnlyHintInlining: {
     PMBuilder.Inliner =
         createFunctionInliningPass(OptLevel, CodeGenOpts.OptimizeSize);
     break;
Index: cfe/trunk/lib/CodeGen/CodeGenFunction.cpp
===================================================================
--- cfe/trunk/lib/CodeGen/CodeGenFunction.cpp
+++ cfe/trunk/lib/CodeGen/CodeGenFunction.cpp
@@ -686,14 +686,20 @@
 
   // Pass inline keyword to optimizer if it appears explicitly on any
   // declaration. Also, in the case of -fno-inline attach NoInline
-  // attribute to all function that are not marked AlwaysInline.
+  // attribute to all functions that are not marked AlwaysInline, or
+  // to all functions that are not marked inline or implicitly inline
+  // in the case of -finline-hint-functions.
   if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D)) {
-    if (!CGM.getCodeGenOpts().NoInline) {
+    const CodeGenOptions& CodeGenOpts = CGM.getCodeGenOpts();
+    if (!CodeGenOpts.NoInline) {
       for (auto RI : FD->redecls())
         if (RI->isInlineSpecified()) {
           Fn->addFnAttr(llvm::Attribute::InlineHint);
           break;
         }
+      if (CodeGenOpts.getInlining() == CodeGenOptions::OnlyHintInlining &&
+          !FD->isInlined() && !Fn->hasFnAttribute(llvm::Attribute::InlineHint))
+        Fn->addFnAttr(llvm::Attribute::NoInline);
     } else if (!FD->hasAttr<AlwaysInlineAttr>())
       Fn->addFnAttr(llvm::Attribute::NoInline);
     if (CGM.getLangOpts().OpenMP && FD->hasAttr<OMPDeclareSimdDeclAttr>())
Index: cfe/trunk/lib/Driver/MSVCToolChain.cpp
===================================================================
--- cfe/trunk/lib/Driver/MSVCToolChain.cpp
+++ cfe/trunk/lib/Driver/MSVCToolChain.cpp
@@ -728,7 +728,7 @@
           DAL.AddFlagArg(A, Opts.getOption(options::OPT_fno_inline));
           break;
         case '1':
-          // TODO: Inline calls to 'inline functions' only.
+          DAL.AddFlagArg(A, Opts.getOption(options::OPT_finline_hint_functions));
           break;
         case '2':
           DAL.AddFlagArg(A, Opts.getOption(options::OPT_finline_functions));
Index: cfe/trunk/lib/Driver/Tools.cpp
===================================================================
--- cfe/trunk/lib/Driver/Tools.cpp
+++ cfe/trunk/lib/Driver/Tools.cpp
@@ -5405,6 +5405,7 @@
     CmdArgs.push_back("-fno-inline");
 
   if (Arg* InlineArg = Args.getLastArg(options::OPT_finline_functions,
+                                       options::OPT_finline_hint_functions,
                                        options::OPT_fno_inline_functions))
     InlineArg->render(Args, CmdArgs);
 
Index: cfe/trunk/lib/Frontend/CompilerInvocation.cpp
===================================================================
--- cfe/trunk/lib/Frontend/CompilerInvocation.cpp
+++ cfe/trunk/lib/Frontend/CompilerInvocation.cpp
@@ -442,10 +442,15 @@
   // -fno-inline-functions overrides OptimizationLevel > 1.
   Opts.NoInline = Args.hasArg(OPT_fno_inline);
   if (Arg* InlineArg = Args.getLastArg(options::OPT_finline_functions,
+                                       options::OPT_finline_hint_functions,
                                        options::OPT_fno_inline_functions)) {
-    Opts.setInlining(
-      InlineArg->getOption().matches(options::OPT_finline_functions) ?
-        CodeGenOptions::NormalInlining : CodeGenOptions::OnlyAlwaysInlining);
+    const Option& InlineOpt = InlineArg->getOption();
+    if (InlineOpt.matches(options::OPT_finline_functions))
+      Opts.setInlining(CodeGenOptions::NormalInlining);
+    else if (InlineOpt.matches(options::OPT_finline_hint_functions))
+      Opts.setInlining(CodeGenOptions::OnlyHintInlining);
+    else
+      Opts.setInlining(CodeGenOptions::OnlyAlwaysInlining);
   }
 
   if (Arg *A = Args.getLastArg(OPT_fveclib)) {
Index: cfe/trunk/test/CodeGen/inline-optim.c
===================================================================
--- cfe/trunk/test/CodeGen/inline-optim.c
+++ cfe/trunk/test/CodeGen/inline-optim.c
@@ -2,6 +2,7 @@
 
 // RUN: %clang_cc1 -triple i686-pc-win32 -emit-llvm %s -o - | FileCheck -check-prefix=NOINLINE %s
 // RUN: %clang_cc1 -triple i686-pc-win32 -O3 -fno-inline-functions -emit-llvm %s -o - | FileCheck -check-prefix=NOINLINE %s
+// RUN: %clang_cc1 -triple i686-pc-win32 -finline-hint-functions -emit-llvm %s -o - | FileCheck -check-prefix=HINT %s
 // RUN: %clang_cc1 -triple i686-pc-win32 -finline-functions -emit-llvm %s -o - | FileCheck -check-prefix=INLINE %s
 
 inline int inline_hint(int a, int b) { return(a+b); }
@@ -13,14 +14,18 @@
 volatile int *pa = (int*) 0x1000;
 void foo() {
 // NOINLINE-LABEL: @foo
+// HINT-LABEL: @foo
 // INLINE-LABEL: @foo
 // NOINLINE: call i32 @inline_hint
+// HINT-NOT: call i32 @inline_hint
 // INLINE-NOT: call i32 @inline_hint
     pa[0] = inline_hint(pa[1],pa[2]);
 // NOINLINE-NOT: call i32 @inline_always
+// HINT-NOT: call i32 @inline_always
 // INLINE-NOT: call i32 @inline_always
     pa[3] = inline_always(pa[4],pa[5]);
 // NOINLINE: call i32 @inline_no_hint
+// HINT: call i32 @inline_no_hint
 // INLINE-NOT: call i32 @inline_no_hint
     pa[6] = inline_no_hint(pa[7], pa[8]);
 }
Index: cfe/trunk/test/CodeGenCXX/inline-hint.cpp
===================================================================
--- cfe/trunk/test/CodeGenCXX/inline-hint.cpp
+++ cfe/trunk/test/CodeGenCXX/inline-hint.cpp
@@ -0,0 +1,96 @@
+// RUN: %clang_cc1 %s -std=c++11 -triple=x86_64-linux -finline-functions -emit-llvm -disable-llvm-optzns -o - | FileCheck %s --check-prefix=CHECK --check-prefix=SUITABLE
+// RUN: %clang_cc1 %s -std=c++11 -triple=x86_64-linux -finline-hint-functions -emit-llvm -disable-llvm-optzns -o - | FileCheck %s --check-prefix=CHECK --check-prefix=HINTED
+// RUN: %clang_cc1 %s -std=c++11 -triple=x86_64-linux -fno-inline -emit-llvm -disable-llvm-optzns -o - | FileCheck %s --check-prefix=CHECK --check-prefix=NOINLINE
+
+// Force non-trivial implicit constructors/destructors/operators for B by having explicit ones for A
+struct A {
+  A() {}
+  A(const A&) {}
+  A& operator=(const A&) { return *this; }
+  ~A() {}
+};
+
+struct B {
+  A member;
+  int implicitFunction(int a) { return a + a; }
+  inline int explicitFunction(int a);
+  int noHintFunction(int a);
+  __attribute__((optnone)) int optNoneFunction(int a) { return a + a; }
+  template<int N> int implicitTplFunction(int a) { return N + a; }
+  template<int N> inline int explicitTplFunction(int a) { return N + a; }
+  template<int N> int noHintTplFunction(int a);
+  template<int N> int explicitRedeclTplFunction(int a);
+};
+
+int B::explicitFunction(int a) { return a + a; }
+// CHECK: @_ZN1B14noHintFunctionEi({{.*}}) [[NOHINT_ATTR:#[0-9]+]]
+int B::noHintFunction(int a) { return a + a; }
+
+// CHECK: @_ZN1B19implicitTplFunctionILi0EEEii({{.*}}) [[NOHINT_ATTR]]
+template<> int B::implicitTplFunction<0>(int a) { return a + a; }
+// CHECK: @_ZN1B19explicitTplFunctionILi0EEEii({{.*}}) [[NOHINT_ATTR]]
+template<> int B::explicitTplFunction<0>(int a) { return a + a; }
+// CHECK: @_ZN1B17noHintTplFunctionILi0EEEii({{.*}}) [[NOHINT_ATTR]]
+template<> int B::noHintTplFunction<0>(int a) { return a + a; }
+template<> inline int B::implicitTplFunction<1>(int a) { return a; }
+template<> inline int B::explicitTplFunction<1>(int a) { return a; }
+template<> inline int B::noHintTplFunction<1>(int a) { return a; }
+template<int N> int B::noHintTplFunction(int a) { return N + a; }
+template<int N> inline int B::explicitRedeclTplFunction(int a) { return N + a; }
+
+constexpr int constexprFunction(int a) { return a + a; }
+
+void foo()
+{
+// CHECK: @_ZN1BC1Ev({{.*}}) unnamed_addr [[IMPLICIT_CONSTR_ATTR:#[0-9]+]]
+  B b1;
+// CHECK: @_ZN1BC1ERKS_({{.*}}) unnamed_addr [[IMPLICIT_CONSTR_ATTR]]
+  B b2(b1);
+// CHECK: @_ZN1BaSERKS_({{.*}}) [[IMPLICIT_CONSTR_ATTR]]
+  b2 = b1;
+// CHECK: @_ZN1B16implicitFunctionEi({{.*}}) [[IMPLICIT_ATTR:#[0-9]+]]
+  b1.implicitFunction(1);
+// CHECK: @_ZN1B16explicitFunctionEi({{.*}}) [[EXPLICIT_ATTR:#[0-9]+]]
+  b1.explicitFunction(2);
+  b1.noHintFunction(3);
+// CHECK: @_ZN1B15optNoneFunctionEi({{.*}}) [[OPTNONE_ATTR:#[0-9]+]]
+  b1.optNoneFunction(4);
+// CHECK: @_Z17constexprFunctioni({{.*}}) [[IMPLICIT_ATTR]]
+  constexprFunction(5);
+  b1.implicitTplFunction<0>(6);
+// CHECK: @_ZN1B19implicitTplFunctionILi1EEEii({{.*}}) [[EXPLICIT_ATTR]]
+  b1.implicitTplFunction<1>(7);
+// CHECK: @_ZN1B19implicitTplFunctionILi2EEEii({{.*}}) [[IMPLICIT_ATTR]]
+  b1.implicitTplFunction<2>(8);
+  b1.explicitTplFunction<0>(9);
+// CHECK: @_ZN1B19explicitTplFunctionILi1EEEii({{.*}}) [[EXPLICIT_ATTR]]
+  b1.explicitTplFunction<1>(10);
+// CHECK: @_ZN1B19explicitTplFunctionILi2EEEii({{.*}}) [[EXPLICIT_ATTR]]
+  b1.explicitTplFunction<2>(11);
+  b1.noHintTplFunction<0>(12);
+// CHECK: @_ZN1B17noHintTplFunctionILi1EEEii({{.*}}) [[EXPLICIT_ATTR]]
+  b1.noHintTplFunction<1>(13);
+// CHECK: @_ZN1B17noHintTplFunctionILi2EEEii({{.*}}) [[NOHINT_ATTR]]
+  b1.noHintTplFunction<2>(14);
+// CHECK: @_ZN1B25explicitRedeclTplFunctionILi2EEEii({{.*}}) [[EXPLICIT_ATTR]]
+  b1.explicitRedeclTplFunction<2>(15);
+// CHECK: @_ZN1BD2Ev({{.*}}) unnamed_addr [[IMPLICIT_CONSTR_ATTR]]
+}
+
+// SUITABLE-NOT: attributes [[NOHINT_ATTR]] = { {{.*}}noinline{{.*}} }
+//   HINTED-DAG: attributes [[NOHINT_ATTR]] = { noinline{{.*}} }
+// NOINLINE-DAG: attributes [[NOHINT_ATTR]] = { noinline{{.*}} }
+
+// SUITABLE-NOT: attributes [[IMPLICIT_ATTR]] = { {{.*}}noinline{{.*}} }
+//   HINTED-NOT: attributes [[IMPLICIT_ATTR]] = { {{.*}}noinline{{.*}} }
+// NOINLINE-DAG: attributes [[IMPLICIT_ATTR]] = { noinline{{.*}} }
+
+// SUITABLE-NOT: attributes [[IMPLICIT_CONSTR_ATTR]] = { {{.*}}noinline{{.*}} }
+//   HINTED-NOT: attributes [[IMPLICIT_ATTR]] = { {{.*}}noinline{{.*}} }
+// NOINLINE-DAG: attributes [[IMPLICIT_CONSTR_ATTR]] = { noinline{{.*}} }
+
+// SUITABLE-NOT: attributes [[EXPLICIT_ATTR]] = { {{.*}}noinline{{.*}} }
+//   HINTED-NOT: attributes [[IMPLICIT_ATTR]] = { {{.*}}noinline{{.*}} }
+// NOINLINE-DAG: attributes [[EXPLICIT_ATTR]] = { noinline{{.*}} }
+
+// CHECK-DAG: attributes [[OPTNONE_ATTR]] = { noinline{{.*}} }
Index: cfe/trunk/test/Driver/cl-options.c
===================================================================
--- cfe/trunk/test/Driver/cl-options.c
+++ cfe/trunk/test/Driver/cl-options.c
@@ -113,6 +113,10 @@
 // Ob2-NOT: warning: argument unused during compilation: '/O2'
 // Ob2: -finline-functions
 
+// RUN: %clang_cl /Ob1 -### -- %s 2>&1 | FileCheck -check-prefix=Ob1 %s
+// RUN: %clang_cl /Odb1 -### -- %s 2>&1 | FileCheck -check-prefix=Ob1 %s
+// Ob1: -finline-hint-functions
+
 // RUN: %clang_cl /Od -### -- %s 2>&1 | FileCheck -check-prefix=Od %s
 // Od: -O0
 
@@ -280,7 +284,6 @@
 // RUN:    /GS- \
 // RUN:    /kernel- \
 // RUN:    /nologo \
-// RUN:    /Ob1 \
 // RUN:    /openmp- \
 // RUN:    /RTC1 \
 // RUN:    /sdl \