[PATCH] D148465: [Demangle] demangle builtin type transformations

[Congcong Cai via Phabricator via llvm-commits]

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https://reviews.llvm.org/D116203 introduced several compiler builtin
equivalents of the unary type traits. In some cases (e.g. template) those
builtin will be dependent and need to be mangle.
This patch add the check for `u{builtin}I{type}E` to demangle it.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D148465

Files:
  llvm/include/llvm/Demangle/ItaniumDemangle.h


Index: llvm/include/llvm/Demangle/ItaniumDemangle.h
===================================================================
--- llvm/include/llvm/Demangle/ItaniumDemangle.h
+++ llvm/include/llvm/Demangle/ItaniumDemangle.h
@@ -3885,6 +3885,18 @@
     // but the exception to that exception is vendor extended types (Itanium C++
     // ABI 5.9.1).
     Result = make<NameType>(Res);
+
+    // demangle builtin type transformations introduced in https://reviews.llvm.org/D116203
+    if (consumeIf('I')) {
+      Node *BaseType = parseType();
+      if (BaseType == nullptr)
+        return nullptr;
+      Result = make<FunctionEncoding>(nullptr, Result, makeNodeArray(&BaseType, &BaseType+1),
+                                      nullptr, Qualifiers::QualNone,
+                                      FunctionRefQual::FrefQualNone);
+      if (!consumeIf('E'))
+        return nullptr;
+    }
     break;
   }
   case 'D':


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