[llvm] [LLVM] Change Intrinsic::ID to encode target and intrinsic index (PR #113576)

[Rahul Joshi via llvm-commits]

================
@@ -33,8 +33,54 @@
 #include "llvm/IR/IntrinsicsXCore.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IR/Type.h"
+#include "llvm/Support/IntrinsicID.h"
 
 using namespace llvm;
+using namespace Intrinsic;
+
+/// Table of per-target intrinsic name tables.
+#define GET_INTRINSIC_TARGET_DATA
+#include "llvm/IR/IntrinsicImpl.inc"
+#undef GET_INTRINSIC_TARGET_DATA
+size_t constexpr NumTargets = sizeof(TargetInfos) / sizeof(TargetInfos[0]);
+
+// Returns true if the given intrinsic ID is valid, that is, its value is one
+// of the enum values defined for this intrinsic (including not_intrinsic).
+bool Intrinsic::IsIntrinsicIDValid(ID ID) {
+  if (ID == Intrinsic::not_intrinsic)
+    return true;
+  auto Decoded = DecodeIntrinsicIDNoFail(ID);
+  if (!Decoded)
+    return false;
+  unsigned TargetIdx = Decoded->first;
+  unsigned IntrinsicIdx = Decoded->second;
+  return TargetIdx < NumTargets && IntrinsicIdx < TargetInfos[TargetIdx].Count;
+}
+
+// Returns linear index of ID if its valid, else returns 0.
+inline unsigned getLinearIndex(Intrinsic::ID ID) {
----------------
jurahul wrote:

Done

https://github.com/llvm/llvm-project/pull/113576