[clang] Re-enable reference types by default (PR #93261)

[Heejin Ahn via cfe-commits]

https://github.com/aheejin created https://github.com/llvm/llvm-project/pull/93261

Now that we are about to upgrade emsdk's default node to v18.20.3 (https://github.com/emscripten-core/emsdk/pull/1387), we can re-enable reference-types by default again. This effectively reverts #90792.

>From 25fc2c2caa1b6bdc4883b1349fa4e75e670a0ffa Mon Sep 17 00:00:00 2001
From: Heejin Ahn <aheejin at gmail.com>
Date: Fri, 24 May 2024 01:02:26 +0000
Subject: [PATCH] Re-enable reference types by default

Now that we are about to upgrade emsdk's default node to v18.20.3
(https://github.com/emscripten-core/emsdk/pull/1387), we can re-enable
reference-types by default again. This effectively reverts #90792.
---
 clang/docs/ReleaseNotes.rst                    | 8 ++++----
 clang/lib/Basic/Targets/WebAssembly.cpp        | 2 +-
 clang/test/Preprocessor/wasm-target-features.c | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 2b35e2162ab5b..dfc1af8c4be8a 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -881,10 +881,10 @@ AIX Support
 WebAssembly Support
 ^^^^^^^^^^^^^^^^^^^
 
-The -mcpu=generic configuration now enables multivalue feature, which is
-standardized and available in all major engines. Enabling multivalue here only
-enables the language feature but does not turn on the multivalue ABI (this
-enables non-ABI uses of multivalue, like exnref).
+The -mcpu=generic configuration now enables multivalue and reference-types.These
+proposals are standardized and available in all major engines. Enabling
+multivalue here only enables the language feature but does not turn on the
+multivalue ABI (this enables non-ABI uses of multivalue, like exnref).
 
 AVR Support
 ^^^^^^^^^^^
diff --git a/clang/lib/Basic/Targets/WebAssembly.cpp b/clang/lib/Basic/Targets/WebAssembly.cpp
index 5a000314a72ce..1e565f0a5319f 100644
--- a/clang/lib/Basic/Targets/WebAssembly.cpp
+++ b/clang/lib/Basic/Targets/WebAssembly.cpp
@@ -153,6 +153,7 @@ bool WebAssemblyTargetInfo::initFeatureMap(
   auto addGenericFeatures = [&]() {
     Features["multivalue"] = true;
     Features["mutable-globals"] = true;
+    Features["reference-types"] = true;
     Features["sign-ext"] = true;
   };
   auto addBleedingEdgeFeatures = [&]() {
@@ -164,7 +165,6 @@ bool WebAssemblyTargetInfo::initFeatureMap(
     Features["half-precision"] = true;
     Features["multimemory"] = true;
     Features["nontrapping-fptoint"] = true;
-    Features["reference-types"] = true;
     Features["tail-call"] = true;
     setSIMDLevel(Features, RelaxedSIMD, true);
   };
diff --git a/clang/test/Preprocessor/wasm-target-features.c b/clang/test/Preprocessor/wasm-target-features.c
index 9d49e3af603f8..d5539163b3bf5 100644
--- a/clang/test/Preprocessor/wasm-target-features.c
+++ b/clang/test/Preprocessor/wasm-target-features.c
@@ -164,6 +164,7 @@
 //
 // GENERIC-INCLUDE-DAG: #define __wasm_multivalue__ 1{{$}}
 // GENERIC-INCLUDE-DAG: #define __wasm_mutable_globals__ 1{{$}}
+// GENERIC-INCLUDE-DAG: #define __wasm_reference_types__ 1{{$}}
 // GENERIC-INCLUDE-DAG: #define __wasm_sign_ext__ 1{{$}}
 //
 // RUN: %clang -E -dM %s -o - 2>&1 \
@@ -180,7 +181,6 @@
 // GENERIC-NOT: #define __wasm_half_precision__ 1{{$}}
 // GENERIC-NOT: #define __wasm_multimemory__ 1{{$}}
 // GENERIC-NOT: #define __wasm_nontrapping_fptoint__ 1{{$}}
-// GENERIC-NOT: #define __wasm_reference_types__ 1{{$}}
 // GENERIC-NOT: #define __wasm_relaxed_simd__ 1{{$}}
 // GENERIC-NOT: #define __wasm_simd128__ 1{{$}}
 // GENERIC-NOT: #define __wasm_tail_call__ 1{{$}}