[Mips] Support -mmicromips / -mno-micromips command line options.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179489 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Driver/Options.td

@@ -957,6 +957,8 @@ def mprfchw : Flag<["-"], "mprfchw">, Group<m_x86_Features_Group>;
 def mrdseed : Flag<["-"], "mrdseed">, Group<m_x86_Features_Group>;
 def mips16 : Flag<["-"], "mips16">, Group<m_Group>;
 def mno_mips16 : Flag<["-"], "mno-mips16">, Group<m_Group>;
+def mmicromips : Flag<["-"], "mmicromips">, Group<m_Group>;
+def mno_micromips : Flag<["-"], "mno-micromips">, Group<m_Group>;
 def mxgot : Flag<["-"], "mxgot">, Group<m_Group>;
 def mno_xgot : Flag<["-"], "mno-xgot">, Group<m_Group>;
 def mdsp : Flag<["-"], "mdsp">, Group<m_Group>;

lib/Basic/Targets.cpp

@@ -4405,6 +4405,7 @@ class MipsTargetInfoBase : public TargetInfo {
   static const Builtin::Info BuiltinInfo[];
   std::string CPU;
   bool IsMips16;
+  bool IsMicromips;
   bool IsSingleFloat;
   enum MipsFloatABI {
     HardFloat, SoftFloat
@@ -4423,6 +4424,7 @@ public:
     : TargetInfo(triple),
       CPU(CPUStr),
       IsMips16(false),
+      IsMicromips(false),
       IsSingleFloat(false),
       FloatABI(HardFloat),
       DspRev(NoDSP),
@@ -4461,6 +4463,9 @@ public:
     if (IsMips16)
       Builder.defineMacro("__mips16", Twine(1));
 
+    if (IsMicromips)
+      Builder.defineMacro("__mips_micromips", Twine(1));
+
     switch (DspRev) {
     default:
       break;
@@ -4550,7 +4555,8 @@ public:
         Name == "o32" || Name == "n32" || Name == "n64" || Name == "eabi" ||
         Name == "mips32" || Name == "mips32r2" ||
         Name == "mips64" || Name == "mips64r2" ||
-        Name == "mips16" || Name == "dsp" || Name == "dspr2") {
+        Name == "mips16" || Name == "micromips" ||
+        Name == "dsp" || Name == "dspr2") {
       Features[Name] = Enabled;
       return true;
     } else if (Name == "32") {
@@ -4565,6 +4571,7 @@ public:
 
   virtual void HandleTargetFeatures(std::vector<std::string> &Features) {
     IsMips16 = false;
+    IsMicromips = false;
     IsSingleFloat = false;
     FloatABI = HardFloat;
     DspRev = NoDSP;
@@ -4577,6 +4584,8 @@ public:
         FloatABI = SoftFloat;
       else if (*it == "+mips16")
         IsMips16 = true;
+      else if (*it == "+micromips")
+        IsMicromips = true;
       else if (*it == "+dsp")
         DspRev = std::max(DspRev, DSP1);
       else if (*it == "+dspr2")

lib/Driver/Tools.cpp

@@ -990,6 +990,9 @@ void Clang::AddMIPSTargetArgs(const ArgList &Args,
   AddTargetFeature(Args, CmdArgs,
                    options::OPT_mips16, options::OPT_mno_mips16,
                    "mips16");
+  AddTargetFeature(Args, CmdArgs,
+                   options::OPT_mmicromips, options::OPT_mno_micromips,
+                   "micromips");
   AddTargetFeature(Args, CmdArgs,
                    options::OPT_mdsp, options::OPT_mno_dsp,
                    "dsp");

test/Driver/mips-features.c

@@ -14,6 +14,18 @@
 // RUN:   | FileCheck --check-prefix=CHECK-NOMIPS16 %s
 // CHECK-NOMIPS16: "-target-feature" "-mips16"
 //
+// -mmicromips
+// RUN: %clang -target mips-linux-gnu -### -c %s \
+// RUN:     -mno-micromips -mmicromips 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-MICROMIPS %s
+// CHECK-MICROMIPS: "-target-feature" "+micromips"
+//
+// -mno-micromips
+// RUN: %clang -target mips-linux-gnu -### -c %s \
+// RUN:     -mmicromips -mno-micromips 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-NOMICROMIPS %s
+// CHECK-NOMICROMIPS: "-target-feature" "-micromips"
+//
 // -mdsp
 // RUN: %clang -target mips-linux-gnu -### -c %s \
 // RUN:     -mno-dsp -mdsp 2>&1 \

test/Preprocessor/init.c

@@ -1168,6 +1168,16 @@
 // RUN:   | FileCheck -check-prefix NOMIPS16 %s
 // NOMIPS16-NOT:#define __mips16 1
 //
+// RUN: %clang_cc1 -target-feature +micromips \
+// RUN:   -E -dM -triple=mips-none-none < /dev/null \
+// RUN:   | FileCheck -check-prefix MICROMIPS %s
+// MICROMIPS:#define __mips_micromips 1
+//
+// RUN: %clang_cc1 -target-feature -micromips \
+// RUN:   -E -dM -triple=mips-none-none < /dev/null \
+// RUN:   | FileCheck -check-prefix NOMICROMIPS %s
+// NOMICROMIPS-NOT:#define __mips_micromips 1
+//
 // RUN: %clang_cc1 -target-feature +dsp \
 // RUN:   -E -dM -triple=mips-none-none < /dev/null \
 // RUN:   | FileCheck -check-prefix MIPS-DSP %s