[wasm] Remove TableSwitch and replace with br_table.

src/wasm/ast-decoder.h

Index: src/wasm/ast-decoder.h
diff --git a/src/wasm/ast-decoder.h b/src/wasm/ast-decoder.h
index 465bacaab84918b21a1db437b37353940bfb25bc..f77e3951857bc7cb326d550b79d0918b18589fcb 100644
--- a/src/wasm/ast-decoder.h
+++ b/src/wasm/ast-decoder.h
@@ -142,18 +142,16 @@ struct ImportIndexOperand {
   }
 };
 
-struct TableSwitchOperand {
-  uint32_t case_count;
+struct BranchTableOperand {
   uint32_t table_count;
   const byte* table;
   int length;
-  inline TableSwitchOperand(Decoder* decoder, const byte* pc) {
-    case_count = decoder->checked_read_u16(pc, 1, "expected #cases");
-    table_count = decoder->checked_read_u16(pc, 3, "expected #entries");
-    length = 4 + table_count * 2;
+  inline BranchTableOperand(Decoder* decoder, const byte* pc) {
+    table_count = decoder->checked_read_u16(pc, 1, "expected #entries");

[bradn, 2016/03/03 18:08:23]

I assume these are going to lebs in a later change?

+    length = 2 + table_count * 2;
 
-    if (decoder->check(pc, 5, table_count * 2, "expected <table entries>")) {
-      table = pc + 5;
+    if (decoder->check(pc, 3, table_count * 2, "expected <table entries>")) {
+      table = pc + 3;
     } else {
       table = nullptr;
     }