[WebAssembly] Initial WebAssembly support in clang
This implements basic support for compiling (though not yet assembling
or linking) for a WebAssembly target. Note that ABI details are not yet
finalized, and may change.
Differential Revision: http://reviews.llvm.org/D12002
llvm-svn: 246814
diff --git a/clang/lib/CodeGen/ItaniumCXXABI.cpp b/clang/lib/CodeGen/ItaniumCXXABI.cpp
index 9fa4f06..b28ffbf 100644
--- a/clang/lib/CodeGen/ItaniumCXXABI.cpp
+++ b/clang/lib/CodeGen/ItaniumCXXABI.cpp
@@ -354,6 +354,20 @@
// ARM64 libraries are prepared for non-unique RTTI.
bool shouldRTTIBeUnique() const override { return false; }
};
+
+class WebAssemblyCXXABI final : public ItaniumCXXABI {
+public:
+ explicit WebAssemblyCXXABI(CodeGen::CodeGenModule &CGM)
+ : ItaniumCXXABI(CGM, /*UseARMMethodPtrABI=*/true,
+ /*UseARMGuardVarABI=*/true) {}
+
+private:
+ bool HasThisReturn(GlobalDecl GD) const override {
+ return isa<CXXConstructorDecl>(GD.getDecl()) ||
+ (isa<CXXDestructorDecl>(GD.getDecl()) &&
+ GD.getDtorType() != Dtor_Deleting);
+ }
+};
}
CodeGen::CGCXXABI *CodeGen::CreateItaniumCXXABI(CodeGenModule &CGM) {
@@ -377,6 +391,9 @@
case TargetCXXABI::GenericMIPS:
return new ItaniumCXXABI(CGM, /* UseARMMethodPtrABI = */ true);
+ case TargetCXXABI::WebAssembly:
+ return new WebAssemblyCXXABI(CGM);
+
case TargetCXXABI::GenericItanium:
if (CGM.getContext().getTargetInfo().getTriple().getArch()
== llvm::Triple::le32) {