[WebAssembly] Lower va_arg in clang.

This uses the general emitVoidPtrVAArg lowering logic for everything, since
this supports all types, and we don't have any special requirements.

llvm-svn: 261557

1 files changed, 11 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
index 7a122772a49..f19f31584f0 100644
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/lib/CodeGen/TargetInfo.cpp
@@ -616,6 +616,9 @@ private:
     for (auto &Arg : FI.arguments())
       Arg.info = classifyArgumentType(Arg.type);
   }
+
+  Address EmitVAArg(CodeGenFunction &CGF, Address VAListAddr,
+                    QualType Ty) const override;
 };
 
 class WebAssemblyTargetCodeGenInfo final : public TargetCodeGenInfo {
@@ -667,6 +670,14 @@ ABIArgInfo WebAssemblyABIInfo::classifyReturnType(QualType RetTy) const {
   return DefaultABIInfo::classifyReturnType(RetTy);
 }
 
+Address WebAssemblyABIInfo::EmitVAArg(CodeGenFunction &CGF, Address VAListAddr,
+                                      QualType Ty) const {
+  return emitVoidPtrVAArg(CGF, VAListAddr, Ty, /*Indirect=*/ false,
+                          getContext().getTypeInfoInChars(Ty),
+                          CharUnits::fromQuantity(4),
+                          /*AllowHigherAlign=*/ true);
+}
+
 //===----------------------------------------------------------------------===//
 // le32/PNaCl bitcode ABI Implementation
 //