Reland "Try to implement lambdas with inalloca parameters by forwarding without use of inallocas."t

This reverts commit 8ed7aa59f489715d39d32e72a787b8e75cfda151.

Differential Revision: https://reviews.llvm.org/D154007

1 files changed, 12 insertions, 2 deletions

diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index 409f48a..8722fd4 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -1963,6 +1963,9 @@ private:
   /// Check if the return value of this function requires sanitization.
   bool requiresReturnValueCheck() const;
 
+  bool isInAllocaArgument(CGCXXABI &ABI, QualType Ty);
+  bool hasInAllocaArg(const CXXMethodDecl *MD);
+
   llvm::BasicBlock *TerminateLandingPad = nullptr;
   llvm::BasicBlock *TerminateHandler = nullptr;
   llvm::SmallVector<llvm::BasicBlock *, 2> TrapBBs;
@@ -2227,10 +2230,17 @@ public:
   void EmitBlockWithFallThrough(llvm::BasicBlock *BB, const Stmt *S);
 
   void EmitForwardingCallToLambda(const CXXMethodDecl *LambdaCallOperator,
-                                  CallArgList &CallArgs);
+                                  CallArgList &CallArgs,
+                                  const CGFunctionInfo *CallOpFnInfo = nullptr,
+                                  llvm::Constant *CallOpFn = nullptr);
   void EmitLambdaBlockInvokeBody();
-  void EmitLambdaDelegatingInvokeBody(const CXXMethodDecl *MD);
   void EmitLambdaStaticInvokeBody(const CXXMethodDecl *MD);
+  void EmitLambdaDelegatingInvokeBody(const CXXMethodDecl *MD,
+                                      CallArgList &CallArgs);
+  void EmitLambdaInAllocaImplFn(const CXXMethodDecl *CallOp,
+                                const CGFunctionInfo **ImplFnInfo,
+                                llvm::Function **ImplFn);
+  void EmitLambdaInAllocaCallOpBody(const CXXMethodDecl *MD);
   void EmitLambdaVLACapture(const VariableArrayType *VAT, LValue LV) {
     EmitStoreThroughLValue(RValue::get(VLASizeMap[VAT->getSizeExpr()]), LV);
   }