Add support for coldcc to clang

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175912 91177308-0d34-0410-b5e6-96231b3b80d8

7 files changed, 25 insertions, 5 deletions

diff --git a/lib/AST/DumpXML.cpp b/lib/AST/DumpXML.cpp
index be22ae450b..230f2df29c 100644
--- a/lib/AST/DumpXML.cpp
+++ b/lib/AST/DumpXML.cpp
@@ -925,6 +925,7 @@ struct XMLDumper : public XMLDeclVisitor<XMLDumper>,
     case CC_AAPCS_VFP: return set("cc", "aapcs_vfp");
     case CC_PnaclCall: return set("cc", "pnaclcall");
     case CC_IntelOclBicc: return set("cc", "intel_ocl_bicc");
+    case CC_Cold: return set("cc", "coldcc");
     }
   }
 
diff --git a/lib/AST/Type.cpp b/lib/AST/Type.cpp
index efd588a57a..0cadba2749 100644
--- a/lib/AST/Type.cpp
+++ b/lib/AST/Type.cpp
@@ -1547,6 +1547,7 @@ StringRef FunctionType::getNameForCallConv(CallingConv CC) {
     llvm_unreachable("no name for default cc");
 
   case CC_C: return "cdecl";
+  case CC_Cold: return "coldcc";
   case CC_X86StdCall: return "stdcall";
   case CC_X86FastCall: return "fastcall";
   case CC_X86ThisCall: return "thiscall";
diff --git a/lib/AST/TypePrinter.cpp b/lib/AST/TypePrinter.cpp
index 9d1717a220..751e298213 100644
--- a/lib/AST/TypePrinter.cpp
+++ b/lib/AST/TypePrinter.cpp
@@ -626,6 +626,9 @@ void TypePrinter::printFunctionProtoAfter(const FunctionProtoType *T,
   case CC_C:
     OS << " __attribute__((cdecl))";
     break;
+  case CC_Cold:
+    OS << " __attribute__((coldcc))";
+    break;
   case CC_X86StdCall:
     OS << " __attribute__((stdcall))";
     break;
@@ -1156,6 +1159,7 @@ void TypePrinter::printAttributedAfter(const AttributedType *T,
 
   case AttributedType::attr_noreturn: OS << "noreturn"; break;
   case AttributedType::attr_cdecl: OS << "cdecl"; break;
+  case AttributedType::attr_coldcc: OS << "coldcc"; break;
   case AttributedType::attr_fastcall: OS << "fastcall"; break;
   case AttributedType::attr_stdcall: OS << "stdcall"; break;
   case AttributedType::attr_thiscall: OS << "thiscall"; break;
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index eaf2e7d05e..bd80409bd2 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -1933,8 +1933,7 @@ public:
     // We accept all non-ARM calling conventions
     return (CC == CC_X86ThisCall ||
             CC == CC_X86FastCall ||
-            CC == CC_X86StdCall || 
-            CC == CC_C || 
+            CC == CC_X86StdCall ||
             CC == CC_X86Pascal ||
             CC == CC_IntelOclBicc) ? CCCR_OK : CCCR_Warning;
   }
@@ -3027,9 +3026,7 @@ public:
   }
 
   virtual CallingConvCheckResult checkCallingConvention(CallingConv CC) const {
-    return (CC == CC_Default ||
-            CC == CC_C || 
-            CC == CC_IntelOclBicc) ? CCCR_OK : CCCR_Warning;
+    return CC == CC_IntelOclBicc ? CCCR_OK : CCCR_Warning;
   }
 
   virtual CallingConv getDefaultCallingConv(CallingConvMethodType MT) const {
diff --git a/lib/CodeGen/CGCall.cpp b/lib/CodeGen/CGCall.cpp
index 9fd31fe253..f2c2d0a85d 100644
--- a/lib/CodeGen/CGCall.cpp
+++ b/lib/CodeGen/CGCall.cpp
@@ -37,6 +37,7 @@ using namespace CodeGen;
 static unsigned ClangCallConvToLLVMCallConv(CallingConv CC) {
   switch (CC) {
   default: return llvm::CallingConv::C;
+  case CC_Cold: return llvm::CallingConv::Cold;
   case CC_X86StdCall: return llvm::CallingConv::X86_StdCall;
   case CC_X86FastCall: return llvm::CallingConv::X86_FastCall;
   case CC_X86ThisCall: return llvm::CallingConv::X86_ThisCall;
@@ -135,6 +136,9 @@ CodeGenTypes::arrangeFreeFunctionType(CanQual<FunctionProtoType> FTP) {
 
 static CallingConv getCallingConventionForDecl(const Decl *D) {
   // Set the appropriate calling convention for the Function.
+  if (D->hasAttr<ColdCCAttr>())
+    return CC_Cold;
+
   if (D->hasAttr<StdCallAttr>())
     return CC_X86StdCall;
 
diff --git a/lib/Sema/SemaDeclAttr.cpp b/lib/Sema/SemaDeclAttr.cpp
index 5f6f81de14..d764bee097 100644
--- a/lib/Sema/SemaDeclAttr.cpp
+++ b/lib/Sema/SemaDeclAttr.cpp
@@ -3859,6 +3859,11 @@ static void handleCallConvAttr(Sema &S, Decl *D, const AttributeList &Attr) {
   }
 
   switch (Attr.getKind()) {
+  case AttributeList::AT_ColdCC:
+    D->addAttr(::new (S.Context)
+               ColdCCAttr(Attr.getRange(), S.Context,
+                          Attr.getAttributeSpellingListIndex()));
+    return;
   case AttributeList::AT_FastCall:
     D->addAttr(::new (S.Context)
                FastCallAttr(Attr.getRange(), S.Context,
@@ -3939,6 +3944,7 @@ bool Sema::CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC,
   // move to TargetAttributesSema one day.
   switch (attr.getKind()) {
   case AttributeList::AT_CDecl: CC = CC_C; break;
+  case AttributeList::AT_ColdCC: CC = CC_Cold; break;
   case AttributeList::AT_FastCall: CC = CC_X86FastCall; break;
   case AttributeList::AT_StdCall: CC = CC_X86StdCall; break;
   case AttributeList::AT_ThisCall: CC = CC_X86ThisCall; break;
@@ -3971,6 +3977,9 @@ bool Sema::CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC,
   default: llvm_unreachable("unexpected attribute kind");
   }
 
+  if (!isTargetSpecific(CC))
+    return false;
+
   const TargetInfo &TI = Context.getTargetInfo();
   TargetInfo::CallingConvCheckResult A = TI.checkCallingConvention(CC);
   if (A == TargetInfo::CCCR_Warning) {
@@ -4774,6 +4783,7 @@ static void ProcessInheritableDeclAttr(Sema &S, Scope *scope, Decl *D,
     break;
   case AttributeList::AT_StdCall:
   case AttributeList::AT_CDecl:
+  case AttributeList::AT_ColdCC:
   case AttributeList::AT_FastCall:
   case AttributeList::AT_ThisCall:
   case AttributeList::AT_Pascal:
diff --git a/lib/Sema/SemaType.cpp b/lib/Sema/SemaType.cpp
index c47a7f59ac..402e522eeb 100644
--- a/lib/Sema/SemaType.cpp
+++ b/lib/Sema/SemaType.cpp
@@ -100,6 +100,7 @@ static void diagnoseBadTypeAttribute(Sema &S, const AttributeList &attr,
 #define FUNCTION_TYPE_ATTRS_CASELIST \
     case AttributeList::AT_NoReturn: \
     case AttributeList::AT_CDecl: \
+    case AttributeList::AT_ColdCC: \
     case AttributeList::AT_FastCall: \
     case AttributeList::AT_StdCall: \
     case AttributeList::AT_ThisCall: \
@@ -3103,6 +3104,8 @@ static AttributeList::Kind getAttrListKind(AttributedType::Kind kind) {
     return AttributeList::AT_NoReturn;
   case AttributedType::attr_cdecl:
     return AttributeList::AT_CDecl;
+  case AttributedType::attr_coldcc:
+    return AttributeList::AT_ColdCC;
   case AttributedType::attr_fastcall:
     return AttributeList::AT_FastCall;
   case AttributedType::attr_stdcall: