[llvm] Add option to dump IR to files intstead of stderr (PR #66412)

[Matt Arsenault via llvm-commits]

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@@ -684,9 +686,64 @@ PrintIRInstrumentation::~PrintIRInstrumentation() {
   assert(ModuleDescStack.empty() && "ModuleDescStack is not empty at exit");
 }
 
-void PrintIRInstrumentation::pushModuleDesc(StringRef PassID, Any IR) {
+static SmallString<32> getIRDisplayName(Any IR) {
+
+  auto hashName = [](StringRef name) {
+    const size_t hashValue = hash_value(name);
+    return std::to_string(hashValue);
+  };
+
+  SmallString<32> Result;
+  const Module *M = unwrapModule(IR);
+  std::string ModuleName = hashName(M->getName());
+  SmallString<32> IRName;
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arsenm wrote:

Use raw_svector_ostream?

https://github.com/llvm/llvm-project/pull/66412