AsmPrinter: Check subprogram before using it
Check return of `getDISubprogram()` before using it. A WIP patch makes
`DIDescriptor` accessors more strict (and would crash on this).
llvm-svn: 232838
diff --git a/llvm/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp b/llvm/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp
index 96a5036..d2b4eec 100644
--- a/llvm/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp
@@ -190,8 +190,11 @@
return;
assert(FI.End && "Don't know where the function ends?");
- StringRef FuncName = getDISubprogram(GV).getDisplayName(),
- GVName = GV->getName();
+ StringRef GVName = GV->getName();
+ StringRef FuncName;
+ if (DISubprogram SP = getDISubprogram(GV))
+ FuncName = SP.getDisplayName();
+
// FIXME Clang currently sets DisplayName to "bar" for a C++
// "namespace_foo::bar" function, see PR21528. Luckily, dbghelp.dll is trying
// to demangle display names anyways, so let's just put a mangled name into