[clang] [CIR] Upstream simple function bodies (PR #127674)

[Andy Kaylor via cfe-commits]

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@@ -0,0 +1,53 @@
+// Simple functions
+// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir %s -o -  | FileCheck %s
+
+void empty() { }
+// CHECK: cir.func @empty() -> !cir.void {
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andykaylor wrote:

Why aren't the function names mangled?

https://github.com/llvm/llvm-project/pull/127674