From f1ed8e5ed73d4d8bb3498d15e456a7efe9fd9669 Mon Sep 17 00:00:00 2001
From: Johan Engelen <jbc.engelen@gmail.com>
Date: Sun, 26 May 2024 00:41:09 +0200
Subject: [PATCH] Add support for triple wasm32-unknown-emscripten (#4672)

---
 ldc/driver/main.cpp                 |  3 +++
 ldc/tests/codegen/wasm_emscripten.d | 11 +++++++++++
 2 files changed, 14 insertions(+)
 create mode 100644 ldc/tests/codegen/wasm_emscripten.d

diff --git a/ldc/driver/main.cpp b/ldc/driver/main.cpp
index af8254fc553..22980575f70 100644
--- a/ldc/driver/main.cpp
+++ b/ldc/driver/main.cpp
@@ -922,6 +922,9 @@ void registerPredefinedTargetVersions() {
     VersionCondition::addPredefinedGlobalIdent("WASI");
     VersionCondition::addPredefinedGlobalIdent("CRuntime_WASI");
     break;
+  case llvm::Triple::Emscripten:
+    VersionCondition::addPredefinedGlobalIdent("Emscripten");
+    break;
   default:
     if (triple.getEnvironment() == llvm::Triple::Android) {
       VersionCondition::addPredefinedGlobalIdent("Android");
diff --git a/ldc/tests/codegen/wasm_emscripten.d b/ldc/tests/codegen/wasm_emscripten.d
new file mode 100644
index 00000000000..8b00a4ee9d1
--- /dev/null
+++ b/ldc/tests/codegen/wasm_emscripten.d
@@ -0,0 +1,11 @@
+// REQUIRES: target_WebAssembly
+
+// RUN: %ldc -mtriple=wasm32-unknown-emscripten -w -output-ll -of=%t.ll %s
+// RUN: FileCheck %s < %t.ll
+
+// test predefined versions:
+version (Emscripten) {} else static assert(0);
+
+void foo() {}
+
+// CHECK: target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-f128:64-n32:64-S128-ni:1:10:20"