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diff --git a/llvm/utils/extract_symbols.py b/llvm/utils/extract_symbols.py
index 0cbfd2e2910e1..3829f5b64bb4d 100755
--- a/llvm/utils/extract_symbols.py
+++ b/llvm/utils/extract_symbols.py
@@ -113,6 +113,9 @@ def should_keep_microsoft_symbol(symbol, calling_convention_decoration):
and (symbol.startswith("?Head@") or symbol.startswith("?Tail@"))
):
return symbol
+ # Skip symbols added by the compiler with -fprofile-generate.
+ elif symbol.startswith("__prof"):
+ return None
# Keep mangled llvm:: and clang:: function symbols. How we detect these is a
# bit of a mess and imprecise, but that avoids having to completely demangle
# the symbol name. The outermost namespace is at the end of the identifier
@@ -131,7 +134,7 @@ def should_keep_microsoft_symbol(symbol, calling_convention_decoration):
# ::= .+@ (list of types)
# ::= .*Z (list of types, varargs)
# <throw-spec> ::= exceptions are not allowed
- elif re.search(r"(llvm|clang)@@[A-Z][A-Z0-9_]*[A-JQ].+(X|.+@|.*Z)$", symbol):
+ elif re.search(r"(llvm|clang)@@[A-DG-LO-UW-Z][A-Z0-9_]*[A-JQ].+(X|.+@|.*Z)$", symbol):
return symbol
return None