[WebAssembly] replaced .param/.result by .functype

Summary:
This makes it easier/cleaner to generate a single signature from
this directive. Also:
- Adds the symbol name, such that we don't depend on the location
  of this directive anymore.
- Actually constructs the signature in the assembler, and make the
  assembler own it.
- Refactor the use of MVT vs ValType in the streamer and assembler
  to require less conversions overall.
- Changed 700 or so tests to use it.

Reviewers: sbc100, dschuff

Subscribers: jgravelle-google, eraman, aheejin, sunfish, jfb, llvm-commits

Differential Revision: https://reviews.llvm.org/D54652

llvm-svn: 347228

1 files changed, 8 insertions, 4 deletions

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyMachineFunctionInfo.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyMachineFunctionInfo.cpp
index 073706e567e..0157af0f851 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyMachineFunctionInfo.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyMachineFunctionInfo.cpp
@@ -64,13 +64,17 @@ void llvm::ComputeSignatureVTs(const FunctionType *Ty, const Function &F,
     Params.push_back(PtrVT);
 }
 
+void llvm::ValTypesFromMVTs(const ArrayRef<MVT> &In,
+                            SmallVectorImpl<wasm::ValType> &Out) {
+  for (MVT Ty : In)
+    Out.push_back(WebAssembly::toValType(Ty));
+}
+
 std::unique_ptr<wasm::WasmSignature>
 llvm::SignatureFromMVTs(const SmallVectorImpl<MVT> &Results,
                         const SmallVectorImpl<MVT> &Params) {
   auto Sig = make_unique<wasm::WasmSignature>();
-  for (MVT Ty : Results)
-    Sig->Returns.push_back(WebAssembly::toValType(Ty));
-  for (MVT Ty : Params)
-    Sig->Params.push_back(WebAssembly::toValType(Ty));
+  ValTypesFromMVTs(Results, Sig->Returns);
+  ValTypesFromMVTs(Params, Sig->Params);
   return Sig;
 }