Merge branch 'release_50' of github.com:llvm-mirror/clang into release_50

Author: schweitzpgi

include/clang/Driver/Options.td

@@ -2422,6 +2422,11 @@ def mhexagon_hvx_double : Flag<["-"], "mhvx-double">, Group<m_hexagon_Features_G
 def mno_hexagon_hvx_double : Flag<["-"], "mno-hvx-double">, Group<m_hexagon_Features_Group>,
     Flags<[CC1Option]>, HelpText<"Disable Hexagon Double Vector eXtensions">;
 
+def mretpoline : Flag<["-"], "mretpoline">, Group<m_x86_Features_Group>;
+def mno_retpoline : Flag<["-"], "mno-retpoline">, Group<m_x86_Features_Group>;
+def mretpoline_external_thunk : Flag<["-"], "mretpoline-external-thunk">, Group<m_x86_Features_Group>;
+def mno_retpoline_external_thunk : Flag<["-"], "mno-retpoline-external-thunk">, Group<m_x86_Features_Group>;
+
 // These are legacy user-facing driver-level option spellings. They are always
 // aliases for options that are spelled using the more common Unix / GNU flag
 // style of double-dash and equals-joined flags.

lib/Basic/Targets.cpp

@@ -2691,6 +2691,8 @@ class X86TargetInfo : public TargetInfo {
   bool HasCLWB = false;
   bool HasMOVBE = false;
   bool HasPREFETCHWT1 = false;
+  bool HasRetpoline = false;
+  bool HasRetpolineExternalThunk = false;
 
   /// \brief Enumeration of all of the X86 CPUs supported by Clang.
   ///
@@ -3821,6 +3823,10 @@ bool X86TargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
       HasPREFETCHWT1 = true;
     } else if (Feature == "+clzero") {
       HasCLZERO = true;
+    } else if (Feature == "+retpoline") {
+      HasRetpoline = true;
+    } else if (Feature == "+retpoline-external-thunk") {
+      HasRetpolineExternalThunk = true;
     }
 
     X86SSEEnum Level = llvm::StringSwitch<X86SSEEnum>(Feature)
@@ -4285,6 +4291,8 @@ bool X86TargetInfo::hasFeature(StringRef Feature) const {
       .Case("rdrnd", HasRDRND)
       .Case("rdseed", HasRDSEED)
       .Case("rtm", HasRTM)
+      .Case("retpoline", HasRetpoline)
+      .Case("retpoline-external-thunk", HasRetpolineExternalThunk)
       .Case("sgx", HasSGX)
       .Case("sha", HasSHA)
       .Case("sse", SSELevel >= SSE1)

test/Driver/x86-target-features.c

@@ -84,3 +84,13 @@
 // RUN: %clang -target i386-unknown-linux-gnu -march=i386 -mno-clzero %s -### -o %t.o 2>&1 | FileCheck -check-prefix=NO-CLZERO %s
 // CLZERO: "-target-feature" "+clzero"
 // NO-CLZERO: "-target-feature" "-clzero"
+
+// RUN: %clang -target i386-linux-gnu -mretpoline %s -### -o %t.o 2>&1 | FileCheck -check-prefix=RETPOLINE %s
+// RUN: %clang -target i386-linux-gnu -mno-retpoline %s -### -o %t.o 2>&1 | FileCheck -check-prefix=NO-RETPOLINE %s
+// RETPOLINE: "-target-feature" "+retpoline"
+// NO-RETPOLINE: "-target-feature" "-retpoline"
+
+// RUN: %clang -target i386-linux-gnu -mretpoline -mretpoline-external-thunk %s -### -o %t.o 2>&1 | FileCheck -check-prefix=RETPOLINE-EXTERNAL-THUNK %s
+// RUN: %clang -target i386-linux-gnu -mretpoline -mno-retpoline-external-thunk %s -### -o %t.o 2>&1 | FileCheck -check-prefix=NO-RETPOLINE-EXTERNAL-THUNK %s
+// RETPOLINE-EXTERNAL-THUNK: "-target-feature" "+retpoline-external-thunk"
+// NO-RETPOLINE-EXTERNAL-THUNK: "-target-feature" "-retpoline-external-thunk"