eandrews added a comment.
In D87701#2280246 <https://reviews.llvm.org/D87701#2280246>, @dmajor wrote:
> This broke Firefox builds too, in one of our helper binaries that uses a
> `wWinMain`, although I'm having trouble writing a minimal reproducer for it.
> Simply making a barebones `wWinMain` program doesn't hit the error.
>
> If the patch re-lands, please cc me and I'll re-test.
Will do. I think MSVC applies calling conventions to entry points when it is
specified in function signature.
int WinMain(int argc) {return 1;}
Compiling this with /Gr generates symbol ` _WinMain@4` , meaning `/Gr` was
ignored and fastcall was not applied to WinMain. But,
int __fastcall WinMain(int argc) {return 1;}
generates symbol ` @WinMain@4`, meaning __fastcall calling convention was
applied to WinMain.
It also looks like stdcall is default calling convention for WinMain.
Anyway, I'll upload a new patch for review once I understand the required
behavior better.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D87701/new/
https://reviews.llvm.org/D87701
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