Revert r112916, it's breaking selfhost pretty badly.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@112925 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 17 insertions, 27 deletions

diff --git a/lib/CodeGen/CGCall.cpp b/lib/CodeGen/CGCall.cpp
index f698d146f1..6072c1c499 100644
--- a/lib/CodeGen/CGCall.cpp
+++ b/lib/CodeGen/CGCall.cpp
@@ -117,9 +117,6 @@ const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const CXXRecordDecl *RD,
 const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const CXXMethodDecl *MD) {
   llvm::SmallVector<CanQualType, 16> ArgTys;
 
-  assert(!isa<CXXConstructorDecl>(MD) && "wrong method for contructors!");
-  assert(!isa<CXXDestructorDecl>(MD) && "wrong method for destructors!");
-
   // Add the 'this' pointer unless this is a static method.
   if (MD->isInstance())
     ArgTys.push_back(GetThisType(Context, MD->getParent()));
diff --git a/lib/CodeGen/CGExprCXX.cpp b/lib/CodeGen/CGExprCXX.cpp
index ab6547fb7e..a5c1691307 100644
--- a/lib/CodeGen/CGExprCXX.cpp
+++ b/lib/CodeGen/CGExprCXX.cpp
@@ -93,9 +93,14 @@ RValue CodeGenFunction::EmitCXXMemberCallExpr(const CXXMemberCallExpr *CE,
     return EmitCall(getContext().getPointerType(MD->getType()), Callee,
                     ReturnValue, CE->arg_begin(), CE->arg_end());
   }
+  
+  const FunctionProtoType *FPT = MD->getType()->getAs<FunctionProtoType>();
 
-  // Compute the object pointer.
+  const llvm::Type *Ty =
+    CGM.getTypes().GetFunctionType(CGM.getTypes().getFunctionInfo(MD),
+                                   FPT->isVariadic());
   llvm::Value *This;
+
   if (ME->isArrow())
     This = EmitScalarExpr(ME->getBase());
   else {
@@ -103,10 +108,7 @@ RValue CodeGenFunction::EmitCXXMemberCallExpr(const CXXMemberCallExpr *CE,
     This = BaseLV.getAddress();
   }
 
-  if (MD->isTrivial()) {
-    if (isa<CXXDestructorDecl>(MD)) return RValue::get(0);
-
-    assert(MD->isCopyAssignment() && "unknown trivial member function");
+  if (MD->isCopyAssignment() && MD->isTrivial()) {
     // We don't like to generate the trivial copy assignment operator when
     // it isn't necessary; just produce the proper effect here.
     llvm::Value *RHS = EmitLValue(*CE->arg_begin()).getAddress();
@@ -114,34 +116,25 @@ RValue CodeGenFunction::EmitCXXMemberCallExpr(const CXXMemberCallExpr *CE,
     return RValue::get(This);
   }
 
-  // Compute the function type we're calling.
-  const CGFunctionInfo &FInfo =
-    (isa<CXXDestructorDecl>(MD)
-     ? CGM.getTypes().getFunctionInfo(cast<CXXDestructorDecl>(MD),
-                                      Dtor_Complete)
-     : CGM.getTypes().getFunctionInfo(MD));
-
-  const FunctionProtoType *FPT = MD->getType()->getAs<FunctionProtoType>();
-  const llvm::Type *Ty
-    = CGM.getTypes().GetFunctionType(FInfo, FPT->isVariadic());
-
   // C++ [class.virtual]p12:
   //   Explicit qualification with the scope operator (5.1) suppresses the
   //   virtual call mechanism.
   //
   // We also don't emit a virtual call if the base expression has a record type
   // because then we know what the type is.
-  bool UseVirtualCall = MD->isVirtual() && !ME->hasQualifier()
-                     && !canDevirtualizeMemberFunctionCalls(ME->getBase());
-
   llvm::Value *Callee;
-  if (const CXXDestructorDecl *Dtor = dyn_cast<CXXDestructorDecl>(MD)) {
-    if (UseVirtualCall) {
-      Callee = BuildVirtualCall(Dtor, Dtor_Complete, This, Ty);
+  if (const CXXDestructorDecl *Destructor
+             = dyn_cast<CXXDestructorDecl>(MD)) {
+    if (Destructor->isTrivial())
+      return RValue::get(0);
+    if (MD->isVirtual() && !ME->hasQualifier() && 
+        !canDevirtualizeMemberFunctionCalls(ME->getBase())) {
+      Callee = BuildVirtualCall(Destructor, Dtor_Complete, This, Ty); 
     } else {
-      Callee = CGM.GetAddrOfFunction(GlobalDecl(Dtor, Dtor_Complete), Ty);
+      Callee = CGM.GetAddrOfFunction(GlobalDecl(Destructor, Dtor_Complete), Ty);
     }
-  } else if (UseVirtualCall) {
+  } else if (MD->isVirtual() && !ME->hasQualifier() && 
+             !canDevirtualizeMemberFunctionCalls(ME->getBase())) {
     Callee = BuildVirtualCall(MD, This, Ty); 
   } else {
     Callee = CGM.GetAddrOfFunction(MD, Ty);