[llvm] [DirectX][NFC] Leverage LLVM and DirectX intrinsic description in DXIL Op records (PR #83193)

[S. Bharadwaj Yadavalli via llvm-commits]

================
@@ -291,49 +246,37 @@ static void emitDXILIntrinsicMap(std::vector<DXILOperationDesc> &Ops,
  @param Attr string reference
  @return std::string Attribute enum string
  */
-static std::string emitDXILOperationAttr(StringRef Attr) {
-  return StringSwitch<std::string>(Attr)
-      .Case("ReadNone", "Attribute::ReadNone")
-      .Case("ReadOnly", "Attribute::ReadOnly")
-      .Default("Attribute::None");
-}
-
-static std::string overloadKindStr(ParameterKind Overload) {
-  switch (Overload) {
-  case ParameterKind::HALF:
-    return "OverloadKind::HALF";
-  case ParameterKind::FLOAT:
-    return "OverloadKind::FLOAT";
-  case ParameterKind::DOUBLE:
-    return "OverloadKind::DOUBLE";
-  case ParameterKind::I1:
-    return "OverloadKind::I1";
-  case ParameterKind::I8:
-    return "OverloadKind::I8";
-  case ParameterKind::I16:
-    return "OverloadKind::I16";
-  case ParameterKind::I32:
-    return "OverloadKind::I32";
-  case ParameterKind::I64:
-    return "OverloadKind::I64";
-  case ParameterKind::VOID:
-    return "OverloadKind::VOID";
-  default:
-    return "OverloadKind::UNKNOWN";
+static std::string emitDXILOperationAttr(SmallVector<std::string> Attrs) {
+  for (auto Attr : Attrs) {
+    // For now just recognize IntrNoMem and IntrReadMem as valid and ignore
+    // others
+    if (Attr == "IntrNoMem") {
+      return "Attribute::ReadNone";
+    } else if (Attr == "IntrReadMem") {
+      return "Attribute::ReadOnly";
+    }
   }
+  return "Attribute::None";
 }
 
-static std::string
-getDXILOperationOverloads(SmallVector<ParameterKind> Overloads) {
-  // Format is: OverloadKind::FLOAT | OverloadKind::HALF
-  auto It = Overloads.begin();
-  std::string Result;
-  raw_string_ostream OS(Result);
-  OS << overloadKindStr(*It);
-  for (++It; It != Overloads.end(); ++It) {
-    OS << " | " << overloadKindStr(*It);
-  }
-  return OS.str();
+static std::string emitOverloadKindStr(std::string OpTypeStr) {
+  std::string Result =
+      StringSwitch<std::string>(OpTypeStr)
+          .Case("llvm_i16_ty", "OverloadKind::I16")
+          .Case("llvm_i32_ty", "OverloadKind::I32")
+          .Case("llvm_i64_ty", "OverloadKind::I64")
+          .Case("llvm_anyint_ty",
+                "OverloadKind::I16 | OverloadKind::I32 | OverloadKind::I64")
+          .Case("llvm_half_ty", "OverloadKind::HALF")
+          .Case("llvm_float_ty", "OverloadKind::FLOAT")
+          .Case("llvm_double_ty", "OverloadKind::DOUBLE")
+          .Case(
+              "llvm_anyfloat_ty",
+              "OverloadKind::HALF | OverloadKind::FLOAT | OverloadKind::DOUBLE")
+          .Default("UNHANDLED_TYPE");
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bharadwajy wrote:

> Doing all of this with strings seems pretty unfortunate. Should we be leveraging `getValueType` from `CodeGenTarget.h` here?

Done. Thanks!

https://github.com/llvm/llvm-project/pull/83193