[llvm] [SPIR-V] Reject fp128 and ppc_fp128 types with a diagnostic (PR #208397)

[Juan Manuel Martinez Caamaño via llvm-commits]

================
@@ -1204,6 +1205,12 @@ SPIRVTypeInst SPIRVGlobalRegistry::createSPIRVType(
                       : getOpTypeInt(Width, MIRBuilder, false);
   }
   if (Ty->isFloatingPointTy()) {
+    if (Ty->isFP128Ty() || Ty->isPPC_FP128Ty()) {
+      Function &F = MIRBuilder.getMF().getFunction();
+      F.getContext().diagnose(DiagnosticInfoUnsupported(
+          F, "fp128 is not supported in SPIR-V", DebugLoc(), DS_Error));
+      return getOpTypeFloat(64, MIRBuilder);
----------------
jmmartinez wrote:

M... awkward, we have to return something valid even if it should have been a failure to select.

Is there a way to catch these earlier without polluting all the code?

Otherwise it's fine.

https://github.com/llvm/llvm-project/pull/208397