[clang] Upstream enum support (PR #136807)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clangir

Author: Ankur Ahir (Ankur-0429)

<details>
<summary>Changes</summary>

#<!-- -->136055 

This PR adds basic support for enum declarations in CIR by handling the Decl::Enum case in CIRGenModule::emitTopLevelDecl(). The implementation currently asserts when debug info generation is requested.

A simple test case with an anonymous enum declaration has been added to verify the functionality.


---
Full diff: https://github.com/llvm/llvm-project/pull/136807.diff


3 Files Affected:

- (modified) clang/lib/CIR/CodeGen/CIRGenModule.cpp (+3) 
- (modified) clang/test/CIR/CodeGen/basic.c (+5) 
- (modified) clang/test/CIR/CodeGen/basic.cpp (+5) 


``````````diff
diff --git a/clang/lib/CIR/CodeGen/CIRGenModule.cpp b/clang/lib/CIR/CodeGen/CIRGenModule.cpp
index 3b13d495be5e3..79db25dda3fea 100644
--- a/clang/lib/CIR/CodeGen/CIRGenModule.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenModule.cpp
@@ -617,6 +617,9 @@ void CIRGenModule::emitTopLevelDecl(Decl *decl) {
   case Decl::OpenACCDeclare:
     emitGlobalOpenACCDecl(cast<OpenACCDeclareDecl>(decl));
     break;
+  case Decl::Enum:
+    assert(!cir::MissingFeatures::generateDebugInfo() && "NYI");
+    break;
 
   case Decl::Typedef:
   case Decl::TypeAlias: // using foo = bar; [C++11]
diff --git a/clang/test/CIR/CodeGen/basic.c b/clang/test/CIR/CodeGen/basic.c
index 1845d3b64bf68..623aad778f0db 100644
--- a/clang/test/CIR/CodeGen/basic.c
+++ b/clang/test/CIR/CodeGen/basic.c
@@ -253,3 +253,8 @@ size_type max_size(void) {
 
 // OGCG: define{{.*}} i64 @max_size()
 // OGCG:   ret i64 2305843009213693951
+
+enum {
+  um = 0,
+  dois = 1,
+};
\ No newline at end of file
diff --git a/clang/test/CIR/CodeGen/basic.cpp b/clang/test/CIR/CodeGen/basic.cpp
index 0f8431325a86f..c1c3e60079869 100644
--- a/clang/test/CIR/CodeGen/basic.cpp
+++ b/clang/test/CIR/CodeGen/basic.cpp
@@ -102,3 +102,8 @@ size_type max_size() {
 // CHECK:   %3 = cir.cast(integral, %2 : !s32i), !u64i
 // CHECK:   %4 = cir.const #cir.int<8> : !u64i
 // CHECK:   %5 = cir.binop(div, %3, %4) : !u64i
+
+enum {
+  um = 0,
+  dois = 1,
+};
\ No newline at end of file

``````````

</details>


https://github.com/llvm/llvm-project/pull/136807