Use asm style type names and improve asm typer.

src/type-cache.h

Index: src/type-cache.h
diff --git a/src/type-cache.h b/src/type-cache.h
index 5eed557f7dff59782815e9458c285fd3dcab8b20..4c351513ca81d7fe45f680b3984b72a12f1348d9 100644
--- a/src/type-cache.h
+++ b/src/type-cache.h
@@ -54,7 +54,13 @@ class TypeCache final {
 
   Type* const kPositiveSafeInteger = CreateRange(0.0, kMaxSafeInteger);
 
-  Type* const kIntegral32 = Type::Union(kInt32, kUint32, zone());
+  // Asm.js related types.
+  Type* const kAsmSigned = kInt32;
+  Type* const kAsmUnsigned = kUint32;
+  Type* const kAsmInt = Type::Union(kAsmSigned, kAsmUnsigned, zone());
+  Type* const kAsmFixnum = Type::Intersect(kAsmSigned, kAsmUnsigned, zone());
+  Type* const kAsmFloat = kFloat32;
+  Type* const kAsmDouble = kFloat64;
 
   // The FixedArray::length property always containts a smi in the range
   // [0, FixedArray::kMaxLength].