[wasm] Introduce a wasm-staging flag

R=mstarzinger@chromium.org

Change-Id: Ic7a3538bbdf3ec2e68c83c397818ab0ca838ddbe
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1738855Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63340}

src/flags/flag-definitions.h

@@ -713,6 +713,13 @@ DEFINE_STRING(dump_wasm_module_path, nullptr,
 FOREACH_WASM_FEATURE_FLAG(DECL_WASM_FLAG)
 #undef DECL_WASM_FLAG
 
+DEFINE_BOOL(wasm_staging, false, "enable staged wasm features")
+
+#define WASM_STAGING_IMPLICATION(feat, desc, val) \
+  DEFINE_IMPLICATION(wasm_staging, experimental_wasm_##feat)
+FOREACH_WASM_STAGING_FEATURE_FLAG(WASM_STAGING_IMPLICATION)
+#undef WASM_STAGING_IMPLICATION
+
 DEFINE_BOOL(wasm_opt, false, "enable wasm optimization")
 DEFINE_BOOL(wasm_no_bounds_checks, false,
             "disable bounds checks (performance testing only)")

src/wasm/wasm-feature-flags.h

@@ -5,17 +5,26 @@
 #ifndef V8_WASM_WASM_FEATURE_FLAGS_H_
 #define V8_WASM_WASM_FEATURE_FLAGS_H_
 
-#define FOREACH_WASM_FEATURE_FLAG(V)                                  \
-  V(mv, "multi-value support", false)                                 \
-  V(eh, "exception handling opcodes", false)                          \
-  V(se, "sign extension opcodes", true)                               \
-  V(sat_f2i_conversions, "saturating float conversion opcodes", true) \
-  V(threads, "thread opcodes", false)                                 \
-  V(simd, "SIMD opcodes", false)                                      \
-  V(anyref, "anyref opcodes", false)                                  \
-  V(bigint, "JS BigInt support", false)                               \
-  V(bulk_memory, "bulk memory opcodes", true)                         \
-  V(return_call, "return call opcodes", false)                        \
-  V(type_reflection, "wasm type reflection in JS", false)             \
+#define FOREACH_WASM_EXPERIMENTAL_FEATURE_FLAG(V)         \
+  V(mv, "multi-value support", false)                     \
+  V(eh, "exception handling opcodes", false)              \
+  V(threads, "thread opcodes", false)                     \
+  V(simd, "SIMD opcodes", false)                          \
+  V(bigint, "JS BigInt support", false)                   \
+  V(return_call, "return call opcodes", false)            \
+  V(type_reflection, "wasm type reflection in JS", false) \
   V(compilation_hints, "compilation hints section", false)
+
+#define FOREACH_WASM_STAGING_FEATURE_FLAG(V) V(anyref, "anyref opcodes", false)
+
+#define FOREACH_WASM_SHIPPED_FEATURE_FLAG(V)                          \
+  V(bulk_memory, "bulk memory opcodes", true)                         \
+  V(sat_f2i_conversions, "saturating float conversion opcodes", true) \
+  V(se, "sign extension opcodes", true)
+
+#define FOREACH_WASM_FEATURE_FLAG(V)        \
+  FOREACH_WASM_EXPERIMENTAL_FEATURE_FLAG(V) \
+  FOREACH_WASM_STAGING_FEATURE_FLAG(V)      \
+  FOREACH_WASM_SHIPPED_FEATURE_FLAG(V)
+
 #endif  // V8_WASM_WASM_FEATURE_FLAGS_H_