[WebAssembly] Allow function signature checking at link time
This change allows checking of function signatures but
does not yes enable it by default. In this mode, linking
two objects that were compiled with a different signatures
for the same function will produce a link error.
New options for enabling and disabling this feature have been
added: (--check-signatures/--no-check-signatures).
Differential Revision: https://reviews.llvm.org/D40371
llvm-svn: 319396
diff --git a/lld/wasm/WriterUtils.cpp b/lld/wasm/WriterUtils.cpp
index e3be081..5bdf0d2 100644
--- a/lld/wasm/WriterUtils.cpp
+++ b/lld/wasm/WriterUtils.cpp
@@ -184,3 +184,32 @@
}
} // namespace lld
+
+std::string lld::toString(ValType Type) {
+ switch (Type) {
+ case ValType::I32:
+ return "I32";
+ case ValType::I64:
+ return "I64";
+ case ValType::F32:
+ return "F32";
+ case ValType::F64:
+ return "F64";
+ }
+ llvm_unreachable("Invalid wasm::ValType");
+}
+
+std::string lld::toString(const WasmSignature &Sig) {
+ SmallString<128> S("(");
+ for (uint32_t Type : Sig.ParamTypes) {
+ if (S.size() != 1)
+ S += ", ";
+ S += toString(static_cast<ValType>(Type));
+ }
+ S += ") -> ";
+ if (Sig.ReturnType == WASM_TYPE_NORESULT)
+ S += "void";
+ else
+ S += toString(static_cast<ValType>(Sig.ReturnType));
+ return S.str();
+}