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

[Arthur Eubanks via llvm-commits]

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@@ -55,15 +73,19 @@ class PrintIRInstrumentation {
   bool shouldPrintPassNumbers();
   bool shouldPrintAtPassNumber();
 
-  using PrintModuleDesc = std::tuple<const Module *, std::string, StringRef>;
+  void pushPassRunDescriptor(StringRef PassID, Any IR,
+                             SmallString<128> &DumpIRFilename);
+  PassRunDescriptor popPassRunDescriptor(StringRef PassID);
 
-  void pushModuleDesc(StringRef PassID, Any IR);
-  PrintModuleDesc popModuleDesc(StringRef PassID);
+  SmallString<128> fetchDumpFilename(StringRef PassId, Any IR);
+  StringRef getFileSuffix(SuffixType);
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aeubanks wrote:

all the `SuffixType` stuff can go in the `.cpp` file

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