[wasm][mv] Enable wasm multi-value

R=ahaas@chromium.org

Bug: chromium:1097717
Change-Id: I6c5a0a32191c9a06fd894c8fe7d9367e9403de8c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2362956Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69459}

src/wasm/wasm-feature-flags.h

@@ -49,12 +49,6 @@
 // be shipped with enough lead time to the next branch to allow for
 // stabilization.
 #define FOREACH_WASM_STAGING_FEATURE_FLAG(V) /*          (force 80 columns) */ \
-  /* Multi-value proposal. */                                                  \
-  /* https://github.com/WebAssembly/multi-value */                             \
-  /* V8 side owner: thibaudm */                                                \
-  /* Staged in v8.0. */                                                        \
-  V(mv, "multi-value support", false)                                          \
-                                                                               \
   /* Reference Types, a.k.a. reftypes proposal. */                             \
   /* https://github.com/WebAssembly/reference-types */                         \
   /* V8 side owner: ahaas */                                                   \
@@ -92,7 +86,14 @@
   /* V8 side owner: binji */                                                   \
   /* Shipped in v7.5. */                                                       \
   /* ITS: https://groups.google.com/forum/#!topic/v8-users/zM05lYEBVog */      \
-  V(bulk_memory, "bulk memory opcodes", true)
+  V(bulk_memory, "bulk memory opcodes", true)                                  \
+                                                                               \
+  /* Multi-value proposal. */                                                  \
+  /* https://github.com/WebAssembly/multi-value */                             \
+  /* V8 side owner: thibaudm */                                                \
+  /* Shipped in v8.6. */                                                       \
+  /* ITS: https://groups.google.com/g/v8-users/c/pv2E4yFWeF0 */                \
+  V(mv, "multi-value support", true)
 
 // Combination of all available wasm feature flags.
 #define FOREACH_WASM_FEATURE_FLAG(V)        \

test/mjsunit/wasm/return-calls.js

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --expose-wasm --experimental-wasm-return-call --experimental-wasm-mv --stack-size=64
+// Flags: --expose-wasm --experimental-wasm-return-call --stack-size=64
 
 load("test/mjsunit/wasm/wasm-module-builder.js");
 

test/wasm-spec-tests/testcfg.py

@@ -52,8 +52,7 @@ class TestCase(testcase.D8TestCase):
     for proposal in proposal_flags:
       if os.sep.join(['proposals', proposal['name']]) in self.path:
         return proposal['flags']
-    # TODO(thibaudm): Remove flag when multi-value is shipped.
-    return ['--experimental-wasm-mv']
+    return []
 
 
 def GetSuite(*args, **kwargs):