[Parser] Enable the new text parser by default (#6371)

The new text parser is faster and more standards compliant than the old text
parser. Enable it by default in wasm-opt and update the tests to reflect the
slightly different results it produces. Besides following the spec, the new
parser differs from the old parser in that it:

 - Does not synthesize `loop` and `try` labels unnecessarily
 - Synthesizes different block names in some cases
 - Parses exports in a different order
 - Parses `nop`s instead of empty blocks for empty control flow arms
 - Does not support parsing Poppy IR
 - Produces different error messages
 - Cannot parse `pop` except as the first instruction inside a `catch`

2 files changed, 3 insertions, 1 deletions

diff --git a/src/parser/wat-parser.cpp b/src/parser/wat-parser.cpp
index cc7d87540..fd18fbbe0 100644
--- a/src/parser/wat-parser.cpp
+++ b/src/parser/wat-parser.cpp
@@ -96,6 +96,8 @@ void propagateDebugLocations(Module& wasm) {
   // do not already have their own debug locations.
   PassRunner runner(&wasm);
   runner.add("propagate-debug-locs");
+  // The parser should not be responsible for validation.
+  runner.setIsNested(true);
   runner.run();
 }
 
diff --git a/src/wasm/wasm-io.cpp b/src/wasm/wasm-io.cpp
index df1cc19f4..324637103 100644
--- a/src/wasm/wasm-io.cpp
+++ b/src/wasm/wasm-io.cpp
@@ -33,7 +33,7 @@
 
 namespace wasm {
 
-bool useNewWATParser = false;
+bool useNewWATParser = true;
 
 #define DEBUG_TYPE "writer"