[clang] [CIR][AMDGPU][SPIR-V] Implement __builtin_amdgcn_fence (PR #230829)

[Arseniy Obolenskiy via cfe-commits]

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@@ -0,0 +1,69 @@
+// REQUIRES: amdgpu-registered-target
+// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -x hip -fclangir \
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aobolensk wrote:

Updated

But there are many places where it is still used. Should the be updated as well? or it is intentional? 

https://github.com/llvm/llvm-project/pull/230829