Index: llvm/lib/Transforms/Utils/UniqueInternalLinkageNames.cpp
===================================================================
--- llvm/lib/Transforms/Utils/UniqueInternalLinkageNames.cpp
+++ llvm/lib/Transforms/Utils/UniqueInternalLinkageNames.cpp
@@ -27,9 +27,12 @@
   Md5.final(R);
   SmallString<32> Str;
   llvm::MD5::stringifyResult(R, Str);
+  // Convert MD5hash to Decimal. Demangler suffixes can either contain numbers
+  // or characters but not both.
+  APInt IntHash = APInt(128, Str.str(), 16);
   // Prepend "__uniq" before the hash for tools like profilers to understand that
   // this symbol is of internal linkage type.
-  std::string ModuleNameHash = (Twine(".__uniq.") + Twine(Str)).str();
+  std::string ModuleNameHash = (Twine(".__uniq.") + Twine(IntHash.toString(10, false))).str();
   bool Changed = false;
 
   // Append the module hash to all internal linkage functions.
Index: llvm/test/Transforms/UniqueInternalLinkageNames/unique_symbol_names.ll
===================================================================
--- llvm/test/Transforms/UniqueInternalLinkageNames/unique_symbol_names.ll
+++ llvm/test/Transforms/UniqueInternalLinkageNames/unique_symbol_names.ll
@@ -10,5 +10,5 @@
   ret i32 0
 }
 
-; CHECK: @glob.__uniq.6ae72bb15a7d1834b42ae042a58f7a4d = internal global
-; CHECK: define internal i32 @foo.__uniq.6ae72bb15a7d1834b42ae042a58f7a4d()
+; CHECK: @glob.__uniq.142098474322525230676991677820000238157 = internal global
+; CHECK: define internal i32 @foo.__uniq.142098474322525230676991677820000238157()