[clang] Add zero-initialization for fixed point types

[PiJoules]

No description provided.

[llvmbot]

@llvm/pr-subscribers-clang

Author: None (PiJoules)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/80781.diff

2 Files Affected:

• (modified) clang/lib/AST/ExprConstant.cpp (+4)
• (added) clang/test/CodeGenCXX/fixed-point-zero-init.cpp (+9)

diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 63453890d9879..089bc2094567f 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -11427,6 +11427,10 @@ class FixedPointExprEvaluator
     return true;
   }
 
+  bool ZeroInitialization(const Expr *E) {
+    return Success(0, E);
+  }
+
   //===--------------------------------------------------------------------===//
   //                            Visitor Methods
   //===--------------------------------------------------------------------===//
diff --git a/clang/test/CodeGenCXX/fixed-point-zero-init.cpp b/clang/test/CodeGenCXX/fixed-point-zero-init.cpp
new file mode 100644
index 0000000000000..9a7a6600fe556
--- /dev/null
+++ b/clang/test/CodeGenCXX/fixed-point-zero-init.cpp
@@ -0,0 +1,9 @@
+// RUN: %clang_cc1 -ffixed-point -S -emit-llvm %s -o - | FileCheck %s
+
+// CHECK: @_ZL1a = internal constant [2 x i32] zeroinitializer
+constexpr _Accum a[2] = {};
+
+void func2(const _Accum *);
+void func() {
+  func2(a);
+}

[github-actions]

⚠️ C/C++ code formatter, clang-format found issues in your code. ⚠️

You can test this locally with the following command:

git-clang-format --diff 4d8e849dfbf3ca1301f208a7286b31215d2a94db 3b267b1aeb49aa5ab54920da5f6a1fa7492ae88c -- clang/test/AST/fixed-point-zero-init.cpp clang/lib/AST/ExprConstant.cpp

View the diff from clang-format here.

diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 089bc20945..79541ff8ea 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -11427,9 +11427,7 @@ class FixedPointExprEvaluator
     return true;
   }
 
-  bool ZeroInitialization(const Expr *E) {
-    return Success(0, E);
-  }
+  bool ZeroInitialization(const Expr *E) { return Success(0, E); }
 
   //===--------------------------------------------------------------------===//
   //                            Visitor Methods