[llvm] [PassBuilder] Table-drive pass name printing (PR #202656)

[David Zbarsky via llvm-commits]

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@@ -2850,92 +2796,157 @@ PassBuilder::parseRegAllocFilter(StringRef FilterName) {
   return std::nullopt;
 }
 
-static void printPassName(StringRef PassName, raw_ostream &OS) {
-  OS << "  " << PassName << "\n";
+namespace {
+struct PassNameWithParams {
+  StringLiteral Name;
+  StringLiteral Params;
+};
+} // namespace
+
+LLVM_ATTRIBUTE_NOINLINE static void
+printPassNameList(ArrayRef<StringLiteral> PassNames, raw_ostream &OS) {
+  for (StringRef PassName : PassNames)
+    OS << "  " << PassName << '\n';
 }
-static void printPassName(StringRef PassName, StringRef Params,
-                          raw_ostream &OS) {
-  OS << "  " << PassName << "<" << Params << ">\n";
+
+LLVM_ATTRIBUTE_NOINLINE static void
+printPassNameList(ArrayRef<PassNameWithParams> PassNames, raw_ostream &OS) {
+  for (const PassNameWithParams &PassName : PassNames)
+    OS << "  " << PassName.Name << "<" << PassName.Params << ">\n";
 }
 
 void PassBuilder::printPassNames(raw_ostream &OS) {
   // TODO: print pass descriptions when they are available
 
   OS << "Module passes:\n";
-#define MODULE_PASS(NAME, CREATE_PASS) printPassName(NAME, OS);
+  static constexpr StringLiteral ModulePassNames[] = {
+#define MODULE_PASS(NAME, CREATE_PASS) NAME,
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dzbarsky wrote:

ok, swapped to StringTable-style storage to avoid the relocations

https://github.com/llvm/llvm-project/pull/202656