[llvm] [Offload] Enable more refined debug printing (PR #163431)

[Matt Arsenault via llvm-commits]

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@@ -75,17 +108,45 @@ inline std::atomic<uint32_t> &getInfoLevelInternal() {
 
 inline uint32_t getInfoLevel() { return getInfoLevelInternal().load(); }
 
-inline uint32_t getDebugLevel() {
-  static uint32_t DebugLevel = 0;
-  static std::once_flag Flag{};
-  std::call_once(Flag, []() {
-    if (char *EnvStr = getenv("LIBOMPTARGET_DEBUG"))
-      DebugLevel = std::stoi(EnvStr);
-  });
-
-  return DebugLevel;
+inline DebugOptionTy &getDebugOption() {
+  static DebugOptionTy DebugOption = []() {
+    DebugOptionTy OptVal{0, 0};
+    char *EnvStr = getenv("LIBOMPTARGET_DEBUG");
+    if (!EnvStr || *EnvStr == '0')
+      return OptVal; // undefined or explicitly defined as zero
+    OptVal.Level = std::atoi(EnvStr);
+    if (OptVal.Level)
+      return OptVal; // defined as numeric value
+    struct DebugStrToBitTy {
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arsenm wrote:

static const 

https://github.com/llvm/llvm-project/pull/163431