[clang] [llvm] [clang][SPIR-V] Add support for AMDGCN flavoured SPIRV (PR #89796)

[Joseph Huber via cfe-commits]

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@@ -309,7 +309,45 @@ StringRef AMDGPU::getCanonicalArchName(const Triple &T, StringRef Arch) {
 void AMDGPU::fillAMDGPUFeatureMap(StringRef GPU, const Triple &T,
                                   StringMap<bool> &Features) {
   // XXX - What does the member GPU mean if device name string passed here?
-  if (T.isAMDGCN()) {
+  if (T.isSPIRV() && T.getOS() == Triple::OSType::AMDHSA) {
+    // AMDGCN SPIRV must support the union of all AMDGCN features.
+    Features["atomic-ds-pk-add-16-insts"] = true;
+    Features["atomic-flat-pk-add-16-insts"] = true;
+    Features["atomic-buffer-global-pk-add-f16-insts"] = true;
+    Features["atomic-global-pk-add-bf16-inst"] = true;
+    Features["atomic-fadd-rtn-insts"] = true;
+    Features["ci-insts"] = true;
+    Features["dot1-insts"] = true;
+    Features["dot2-insts"] = true;
+    Features["dot3-insts"] = true;
+    Features["dot4-insts"] = true;
+    Features["dot5-insts"] = true;
+    Features["dot7-insts"] = true;
+    Features["dot8-insts"] = true;
+    Features["dot9-insts"] = true;
+    Features["dot10-insts"] = true;
+    Features["dot11-insts"] = true;
+    Features["dl-insts"] = true;
+    Features["16-bit-insts"] = true;
+    Features["dpp"] = true;
+    Features["gfx8-insts"] = true;
+    Features["gfx9-insts"] = true;
+    Features["gfx90a-insts"] = true;
+    Features["gfx940-insts"] = true;
+    Features["gfx10-insts"] = true;
+    Features["gfx10-3-insts"] = true;
+    Features["gfx11-insts"] = true;
+    Features["gfx12-insts"] = true;
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jhuber6 wrote:

What do these features even mean in the context of SPIR-V? It's basically a format for JIT, so can we really say stuff like GFX12 is available?

https://github.com/llvm/llvm-project/pull/89796