Revert r254203: [mips] Interrupt attribute support.

I forgot to credit the author.

llvm-svn: 254204

2 files changed, 1 insertions, 94 deletions

diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
index df081b4fb9f..06a2e71f5c0 100644
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/lib/CodeGen/TargetInfo.cpp
@@ -5893,27 +5893,6 @@ public:
     else if (FD->hasAttr<NoMips16Attr>()) {
       Fn->addFnAttr("nomips16");
     }
-
-    const MipsInterruptAttr *Attr = FD->getAttr<MipsInterruptAttr>();
-    if (!Attr)
-      return;
-
-    const char *Kind;
-    switch (Attr->getInterrupt()) {
-    default: llvm_unreachable("Unknown Mips interrupt attribute type!");
-    case MipsInterruptAttr::eic:     Kind = "eic"; break;
-    case MipsInterruptAttr::sw0:     Kind = "sw0"; break;
-    case MipsInterruptAttr::sw1:     Kind = "sw1"; break;
-    case MipsInterruptAttr::hw0:     Kind = "hw0"; break;
-    case MipsInterruptAttr::hw1:     Kind = "hw1"; break;
-    case MipsInterruptAttr::hw2:     Kind = "hw2"; break;
-    case MipsInterruptAttr::hw3:     Kind = "hw3"; break;
-    case MipsInterruptAttr::hw4:     Kind = "hw4"; break;
-    case MipsInterruptAttr::hw5:     Kind = "hw5"; break;
-    }
-
-    Fn->addFnAttr("interrupt", Kind);
-
   }
 
   bool initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF,
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index df1641af5f4..13a11bcac9e 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -4450,86 +4450,14 @@ static void handleMSP430InterruptAttr(Sema &S, Decl *D,
   D->addAttr(UsedAttr::CreateImplicit(S.Context));
 }
 
-static void handleMipsInterruptAttr(Sema &S, Decl *D,
-                                    const AttributeList &Attr) {
-  // Only one optional argument permitted.
-  if (Attr.getNumArgs() > 1) {
-    S.Diag(Attr.getLoc(), diag::err_attribute_too_many_arguments)
-        << Attr.getName() << 1;
-    return;
-  }
-
-  StringRef Str;
-  SourceLocation ArgLoc;
-
-  if (Attr.getNumArgs() == 0)
-    Str = "";
-  else if (!S.checkStringLiteralArgumentAttr(Attr, 0, Str, &ArgLoc))
-    return;
-
-  // Semantic checks for a function with the 'interrupt' attribute for MIPS:
-  // a) Must be a function.
-  // b) Must have no parameters.
-  // c) Must have the 'void' return type.
-  // d) Cannot have the 'mips16' attribute, as that instruction set
-  //    lacks the 'eret' instruction.
-  // e) The attribute itself must either have no argument or one of the
-  //    valid interrupt types, see [MipsInterruptDocs].
-
-  if (!isFunctionOrMethod(D)) {
-    S.Diag(D->getLocation(), diag::warn_attribute_wrong_decl_type)
-        << "'interrupt'" << ExpectedFunctionOrMethod;
-    return;
-  }
-
-  if (hasFunctionProto(D) && getFunctionOrMethodNumParams(D) != 0) {
-    S.Diag(D->getLocation(), diag::warn_mips_interrupt_attribute)
-        << 0;
-    return;
-  }
-
-  if (!getFunctionOrMethodResultType(D)->isVoidType()) {
-    S.Diag(D->getLocation(), diag::warn_mips_interrupt_attribute)
-        << 1;
-    return;
-  }
-
-  if (checkAttrMutualExclusion<Mips16Attr>(S, D, Attr.getRange(),
-                                           Attr.getName()))
-    return;
-
-  MipsInterruptAttr::InterruptType Kind;
-  if (!MipsInterruptAttr::ConvertStrToInterruptType(Str, Kind)) {
-    S.Diag(Attr.getLoc(), diag::warn_attribute_type_not_supported)
-        << Attr.getName() << "'" + std::string(Str) + "'";
-    return;
-  }
-
-  D->addAttr(::new (S.Context) MipsInterruptAttr(
-      Attr.getLoc(), S.Context, Kind, Attr.getAttributeSpellingListIndex()));
-}
-
 static void handleInterruptAttr(Sema &S, Decl *D, const AttributeList &Attr) {
   // Dispatch the interrupt attribute based on the current target.
   if (S.Context.getTargetInfo().getTriple().getArch() == llvm::Triple::msp430)
     handleMSP430InterruptAttr(S, D, Attr);
-  else if (S.Context.getTargetInfo().getTriple().getArch() ==
-               llvm::Triple::mipsel ||
-           S.Context.getTargetInfo().getTriple().getArch() ==
-               llvm::Triple::mips)
-    handleMipsInterruptAttr(S, D, Attr);
   else
     handleARMInterruptAttr(S, D, Attr);
 }
 
-static void handleMips16Attribute(Sema &S, Decl *D, const AttributeList &Attr) {
-  if (checkAttrMutualExclusion<MipsInterruptAttr>(S, D, Attr.getRange(),
-                                                  Attr.getName()))
-    return;
-
-  handleSimpleAttribute<Mips16Attr>(S, D, Attr);
-}
-
 static void handleAMDGPUNumVGPRAttr(Sema &S, Decl *D,
                                     const AttributeList &Attr) {
   uint32_t NumRegs;
@@ -4919,7 +4847,7 @@ static void ProcessDeclAttribute(Sema &S, Scope *scope, Decl *D,
     handleDLLAttr(S, D, Attr);
     break;
   case AttributeList::AT_Mips16:
-    handleMips16Attribute(S, D, Attr);
+    handleSimpleAttribute<Mips16Attr>(S, D, Attr);
     break;
   case AttributeList::AT_NoMips16:
     handleSimpleAttribute<NoMips16Attr>(S, D, Attr);