[clang] [llvm] [Clang][AMDGPU] Add builtins for some buffer resource atomics (PR #149216)

[Matt Arsenault via llvm-commits]

================
@@ -0,0 +1,9 @@
+// RUN: %clang_cc1 -triple amdgcn-unknown-unknown -target-cpu gfx90a -target-feature +atomic-fmin-fmax-global-f32 -target-feature +atomic-fmin-fmax-global-f64 -S -verify=expected -o - %s
+// RUN: %clang_cc1 -triple amdgcn-unknown-unknown -target-cpu gfx942 -target-feature +atomic-fmin-fmax-global-f32 -target-feature +atomic-fmin-fmax-global-f64 -S -verify=expected -o - %s
+// RUN: %clang_cc1 -triple amdgcn-unknown-unknown -target-cpu gfx950 -target-feature +atomic-fmin-fmax-global-f32 -target-feature +atomic-fmin-fmax-global-f64 -S -verify=expected -o - %s
+// REQUIRES: amdgpu-registered-target
+
+void test_raw_ptr_atomics(__amdgpu_buffer_rsrc_t rsrc, float f32, double f64, int offset, int soffset, int x) {
+  f32 = __builtin_amdgcn_raw_ptr_buffer_atomic_fmax_f32(f32, rsrc, offset, soffset, x); // expected-error{{argument to '__builtin_amdgcn_raw_ptr_buffer_atomic_fmax_f32' must be a constant integer}}
+  f64 = __builtin_amdgcn_raw_ptr_buffer_atomic_fmax_f64(f64, rsrc, offset, soffset, x); // expected-error{{argument to '__builtin_amdgcn_raw_ptr_buffer_atomic_fmax_f64' must be a constant integer}}
+}
----------------
arsenm wrote:

Missing the fmin cases 

https://github.com/llvm/llvm-project/pull/149216