[clang] [clang] fix half && bfloat16 convert node expr codegen (PR #89051)

[Pengcheng Wang via cfe-commits]

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@@ -0,0 +1,194 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 4
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -target-feature +fullbf16 -S -emit-llvm %s -o - | FileCheck %s
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wangpc-pp wrote:

```suggestion
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -target-feature +fullbf16 -disable-O0-optnone -emit-llvm %s -o - | opt -S -passes=mem2reg | FileCheck %s
```
We can run `mem2reg` to reduce CHECKs.

https://github.com/llvm/llvm-project/pull/89051