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llvm-project/clang/test/CodeGen/pr52782-stdcall-func-decl.cpp

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[clang][#52782] Bail on incomplete parameter type in stdcall name mangling stdcall name mangling requires a suffix with the number equal to the sum of the byte count of all parameter types. In the case of a function prototype that has a parameter type of an incomplete type it is impossible to get the size of the type. While such a function is not callable or able to be defined in the TU, it may still be mangled when generating debug info, which would previously lead to a crash. This patch fixes that by simply bailing out of the loop and using the so far accumulated byte count. This matches GCCs behaviour as well: https://github.com/gcc-mirror/gcc/blob/bc8d6c60137f8bbf173b86ddf31b15d7ba2a33dd/gcc/config/i386/winnt.c#L203 Fixes https://github.com/llvm/llvm-project/issues/52782 Differential Revision: https://reviews.llvm.org/D116020
2021-12-25 04:55:07 +08:00
// RUN: %clang_cc1 -triple i686-w64-windows-gnu -o - -emit-llvm -debug-info-kind=constructor %s | FileCheck %s
enum nsresult {};
class NotNull;
class nsICanvasRenderingContextInternal {
// CHECK: !DISubprogram(name: "InitializeWithDrawTarget", linkageName: "\01__ZN33nsICanvasRenderingContextInternal24InitializeWithDrawTargetE7NotNull@4"
nsresult __stdcall InitializeWithDrawTarget(NotNull);
} nsTBaseHashSet;