[PATCH] D97000: [clang] Increase the bitness of data length in ASTDeclContextNameLookup

[Danila Kutenin via Phabricator via cfe-commits]

danlark created this revision.
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We faced the assert of too many declarations for serialized lookup for a very generated C++ target. We
think moving the type to uint32_t helps us. As I am not sure in the fix, please validate the correctness.

I don't have commit rights. Email: danilak at google.com. Name: Danila Kutenin.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D97000

Files:
  clang/lib/Serialization/ASTReader.cpp
  clang/lib/Serialization/ASTWriter.cpp


Index: clang/lib/Serialization/ASTWriter.cpp
===================================================================
--- clang/lib/Serialization/ASTWriter.cpp
+++ clang/lib/Serialization/ASTWriter.cpp
@@ -3599,9 +3599,7 @@
 
     // 4 bytes for each DeclID.
     unsigned DataLen = 4 * (Lookup.second - Lookup.first);
-    assert(uint16_t(DataLen) == DataLen &&
-           "too many decls for serialized lookup result");
-    LE.write<uint16_t>(DataLen);
+    LE.write<uint32_t>(DataLen);
 
     return std::make_pair(KeyLen, DataLen);
   }
Index: clang/lib/Serialization/ASTReader.cpp
===================================================================
--- clang/lib/Serialization/ASTReader.cpp
+++ clang/lib/Serialization/ASTReader.cpp
@@ -1089,7 +1089,7 @@
   using namespace llvm::support;
 
   unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
-  unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
+  unsigned DataLen = endian::readNext<uint32_t, little, unaligned>(d);
   return std::make_pair(KeyLen, DataLen);
 }
 


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