[WebAssembly] Use LEB encoding for value types

Previously we were using the encoded LEB hex values
for the value types.  This change uses the decoded
negative value and the LEB encoder to write them out.

Differential Revision: https://reviews.llvm.org/D30847

Patch by Sam Clegg

llvm-svn: 297777

1 files changed, 4 insertions, 14 deletions

diff --git a/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.cpp b/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.cpp
index 5a285935e2b..a499cc23a6b 100644
--- a/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.cpp
+++ b/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.cpp
@@ -152,30 +152,20 @@ void WebAssemblyTargetELFStreamer::emitIndirectFunctionType(
 void WebAssemblyTargetELFStreamer::emitGlobalImport(StringRef name) {
 }
 
-static unsigned MVT2WasmType(MVT Ty) {
-  switch (Ty.SimpleTy) {
-  case MVT::i32: return wasm::WASM_TYPE_I32;
-  case MVT::i64: return wasm::WASM_TYPE_I64;
-  case MVT::f32: return wasm::WASM_TYPE_F32;
-  case MVT::f64: return wasm::WASM_TYPE_F64;
-  default: llvm_unreachable("unsupported type");
-  }
-}
-
 void WebAssemblyTargetWasmStreamer::emitParam(MCSymbol *Symbol,
                                               ArrayRef<MVT> Types) {
-  SmallVector<unsigned, 4> Params;
+  SmallVector<wasm::ValType, 4> Params;
   for (MVT Ty : Types)
-    Params.push_back(MVT2WasmType(Ty));
+    Params.push_back(WebAssembly::toValType(Ty));
 
   cast<MCSymbolWasm>(Symbol)->setParams(std::move(Params));
 }
 
 void WebAssemblyTargetWasmStreamer::emitResult(MCSymbol *Symbol,
                                                ArrayRef<MVT> Types) {
-  SmallVector<unsigned, 4> Returns;
+  SmallVector<wasm::ValType, 4> Returns;
   for (MVT Ty : Types)
-    Returns.push_back(MVT2WasmType(Ty));
+    Returns.push_back(WebAssembly::toValType(Ty));
 
   cast<MCSymbolWasm>(Symbol)->setReturns(std::move(Returns));
 }