Add -m(no)-spe to clang

Summary:
r337347 added support for the Signal Processing Engine (SPE) to LLVM.
This follows that up with the clang side.

This adds -mspe and -mno-spe, to match GCC.

Subscribers: nemanjai, kbarton, cfe-commits

Differential Revision: https://reviews.llvm.org/D49754

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@371066 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Driver/Options.td

@@ -2269,6 +2269,8 @@ def faltivec : Flag<["-"], "faltivec">, Group<f_Group>, Flags<[DriverOption]>;
 def fno_altivec : Flag<["-"], "fno-altivec">, Group<f_Group>, Flags<[DriverOption]>;
 def maltivec : Flag<["-"], "maltivec">, Group<m_ppc_Features_Group>;
 def mno_altivec : Flag<["-"], "mno-altivec">, Group<m_ppc_Features_Group>;
+def mspe : Flag<["-"], "mspe">, Group<m_ppc_Features_Group>;
+def mno_spe : Flag<["-"], "mno-spe">, Group<m_ppc_Features_Group>;
 def mvsx : Flag<["-"], "mvsx">, Group<m_ppc_Features_Group>;
 def mno_vsx : Flag<["-"], "mno-vsx">, Group<m_ppc_Features_Group>;
 def msecure_plt : Flag<["-"], "msecure-plt">, Group<m_ppc_Features_Group>;

lib/Basic/Targets/PPC.cpp

@@ -54,6 +54,10 @@ bool PPCTargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
       HasFloat128 = true;
     } else if (Feature == "+power9-vector") {
       HasP9Vector = true;
+    } else if (Feature == "+spe") {
+      HasSPE = true;
+      LongDoubleWidth = LongDoubleAlign = 64;
+      LongDoubleFormat = &llvm::APFloat::IEEEdouble();
     } else if (Feature == "-hard-float") {
       FloatABI = SoftFloat;
     }
@@ -165,6 +169,10 @@ void PPCTargetInfo::getTargetDefines(const LangOptions &Opts,
     Builder.defineMacro("__VEC__", "10206");
     Builder.defineMacro("__ALTIVEC__");
   }
+  if (HasSPE) {
+    Builder.defineMacro("__SPE__");
+    Builder.defineMacro("__NO_FPRS__");
+  }
   if (HasVSX)
     Builder.defineMacro("__VSX__");
   if (HasP8Vector)
@@ -203,7 +211,6 @@ void PPCTargetInfo::getTargetDefines(const LangOptions &Opts,
   //   __CMODEL_LARGE__
   //   _CALL_SYSV
   //   _CALL_DARWIN
-  //   __NO_FPRS__
 }
 
 // Handle explicit options being passed to the compiler here: if we've
@@ -332,6 +339,7 @@ bool PPCTargetInfo::hasFeature(StringRef Feature) const {
       .Case("extdiv", HasExtDiv)
       .Case("float128", HasFloat128)
       .Case("power9-vector", HasP9Vector)
+      .Case("spe", HasSPE)
       .Default(false);
 }
 

lib/Basic/Targets/PPC.h

@@ -66,6 +66,7 @@ class LLVM_LIBRARY_VISIBILITY PPCTargetInfo : public TargetInfo {
   bool HasBPERMD = false;
   bool HasExtDiv = false;
   bool HasP9Vector = false;
+  bool HasSPE = false;
 
 protected:
   std::string ABI;

lib/CodeGen/TargetInfo.cpp

@@ -9726,7 +9726,8 @@ const TargetCodeGenInfo &CodeGenModule::getTargetCodeGenInfo() {
 
   case llvm::Triple::ppc:
     return SetCGInfo(
-        new PPC32TargetCodeGenInfo(Types, CodeGenOpts.FloatABI == "soft"));
+        new PPC32TargetCodeGenInfo(Types, CodeGenOpts.FloatABI == "soft" ||
+                                   getTarget().hasFeature("spe")));
   case llvm::Triple::ppc64:
     if (Triple.isOSBinFormatELF()) {
       PPC64_SVR4_ABIInfo::ABIKind Kind = PPC64_SVR4_ABIInfo::ELFv1;

test/Driver/ppc-features.cpp

@@ -168,6 +168,9 @@
 // RUN: %clang -target powerpc64-unknown-linux-gnu %s -mno-invariant-function-descriptors -minvariant-function-descriptors -### -o %t.o 2>&1 | FileCheck -check-prefix=CHECK-INVFUNCDESC %s
 // CHECK-INVFUNCDESC: "-target-feature" "+invariant-function-descriptors"
 
+// RUN: %clang -target powerpc-unknown-linux-gnu %s -mno-spe -mspe -### -o %t.o 2>&1 | FileCheck -check-prefix=CHECK-SPE %s
+// CHECK-SPE: "-target-feature" "+spe"
+
 // Assembler features
 // RUN: %clang -target powerpc64-unknown-linux-gnu %s -### -o %t.o -no-integrated-as 2>&1 | FileCheck -check-prefix=CHECK_BE_AS_ARGS %s
 // CHECK_BE_AS_ARGS: "-mppc64"

test/Preprocessor/init.c

@@ -7580,6 +7580,11 @@
 //
 // PPC32-LINUX-NOT: _CALL_LINUX
 //
+// RUN: %clang_cc1 -E -dM -ffreestanding -triple=powerpc-unknown-linux-gnu -target-feature +spe < /dev/null | FileCheck -match-full-lines -check-prefix PPC32-SPE %s
+//
+// PPC32-SPE:#define __NO_FPRS__ 1
+// PPC32-SPE:#define __SPE__ 1
+//
 // RUN: %clang_cc1 -E -dM -ffreestanding -triple=powerpc-apple-darwin8 < /dev/null | FileCheck -match-full-lines -check-prefix PPC-DARWIN %s
 //
 // PPC-DARWIN:#define _ARCH_PPC 1