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-rw-r--r--llvm/lib/ToolDrivers/llvm-dlltool/DlltoolDriver.cpp5
1 files changed, 3 insertions, 2 deletions
diff --git a/llvm/lib/ToolDrivers/llvm-dlltool/DlltoolDriver.cpp b/llvm/lib/ToolDrivers/llvm-dlltool/DlltoolDriver.cpp
index eb9b9c3b264..3891efae57b 100644
--- a/llvm/lib/ToolDrivers/llvm-dlltool/DlltoolDriver.cpp
+++ b/llvm/lib/ToolDrivers/llvm-dlltool/DlltoolDriver.cpp
@@ -165,8 +165,9 @@ int llvm::dlltoolDriverMain(llvm::ArrayRef<const char *> ArgsArr) {
E.SymbolName = E.Name;
// Trim off the trailing decoration. Symbols will always have a
// starting prefix here (either _ for cdecl/stdcall, @ for fastcall
- // or ? for C++ functions). (Vectorcall functions also will end up having
- // a prefix here, even if they shouldn't.)
+ // or ? for C++ functions). Vectorcall functions won't have any
+ // fixed prefix, but the function base name will still be at least
+ // one char.
E.Name = E.Name.substr(0, E.Name.find('@', 1));
// By making sure E.SymbolName != E.Name for decorated symbols,
// writeImportLibrary writes these symbols with the type
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