| Issue |
131155
|
| Summary |
PGO fails with "cannot guarantee tail call due to mismatched varargs"
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
akaStiX
|
When compiling Unreal Engine based project with PGO we get this error:
`cannot guarantee tail call due to mismatched varargs
musttail call void @"?TimerUpdate@UDataRegistry@@MEAAXXZ"(ptr noundef %0, ...) #51, !dbg !44172
LLVM ERROR: Broken module found, compilation aborted!
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Exception Code: 0xC000001D
#0 0x00007ff79d18f7f6 xmlLinkGetData (d:\build\AutoSDK\Sync\HostWin64\Win64\LLVM\18.1.8\bin\lld-link.exe+0x210f7f6)
#1 0x00007ffe29b3bab4 (C:\Windows\System32\ucrtbase.dll+0x7bab4)
#2 0x00007ffe29b3ca81 (C:\Windows\System32\ucrtbase.dll+0x7ca81)
#3 0x00007ff79d191c95 xmlLinkGetData (d:\build\AutoSDK\Sync\HostWin64\Win64\LLVM\18.1.8\bin\lld-link.exe+0x2111c95)
#4 0x00007ff79d0ff7a4 xmlLinkGetData (d:\build\AutoSDK\Sync\HostWin64\Win64\LLVM\18.1.8\bin\lld-link.exe+0x207f7a4)
#5 0x00007ff79d2bbf6c xmlLinkGetData (d:\build\AutoSDK\Sync\HostWin64\Win64\LLVM\18.1.8\bin\lld-link.exe+0x223bf6c)
#6 0x00007ff79d26324a xmlLinkGetData (d:\build\AutoSDK\Sync\HostWin64\Win64\LLVM\18.1.8\bin\lld-link.exe+0x21e324a)
#7 0x00007ff79d29b199 xmlLinkGetData (d:\build\AutoSDK\Sync\HostWin64\Win64\LLVM\18.1.8\bin\lld-link.exe+0x221b199)
#8 0x00007ff79d25c828 xmlLinkGetData (d:\build\AutoSDK\Sync\HostWin64\Win64\LLVM\18.1.8\bin\lld-link.exe+0x21dc828)
#9 0x00007ff79d25fb72 xmlLinkGetData (d:\build\AutoSDK\Sync\HostWin64\Win64\LLVM\18.1.8\bin\lld-link.exe+0x21dfb72)
#10 0x00007ff79d1dfb6a xmlLinkGetData (d:\build\AutoSDK\Sync\HostWin64\Win64\LLVM\18.1.8\bin\lld-link.exe+0x215fb6a)
#11 0x00007ff79d1df1f3 xmlLinkGetData (d:\build\AutoSDK\Sync\HostWin64\Win64\LLVM\18.1.8\bin\lld-link.exe+0x215f1f3)
#12 0x00007ff79d1dec66 xmlLinkGetData (d:\build\AutoSDK\Sync\HostWin64\Win64\LLVM\18.1.8\bin\lld-link.exe+0x215ec66)
#13 0x00007ff79d358a0e xmlLinkGetData (d:\build\AutoSDK\Sync\HostWin64\Win64\LLVM\18.1.8\bin\lld-link.exe+0x22d8a0e)
#14 0x00007ff79d358e91 xmlLinkGetData (d:\build\AutoSDK\Sync\HostWin64\Win64\LLVM\18.1.8\bin\lld-link.exe+0x22d8e91)
#15 0x00007ffe29ae6b4c (C:\Windows\System32\ucrtbase.dll+0x26b4c)
#16 0x00007ffe2b284de0 (C:\Windows\System32\KERNEL32.DLL+0x14de0)
#17 0x00007ffe2c2dec4b (C:\Windows\SYSTEM32\ntdll.dll+0x7ec4b)`
Here's the code:
`
class UDataRegistry : public UObject
{
virtual void TimerUpdate();
}
class UDataRegistrySource : public UObject
{
virtual void TimerUpdate();
}
void UDataRegistry::TimerUpdate()
{
float CurrentTime = GetCurrentTime();
for (int32 i = 0; i < RuntimeSources.Num(); i++)
{
UDataRegistrySource* Source = RuntimeSources[i];
if (Source)
{
Source->TimerUpdate(CurrentTime, TimerUpdateFrequency);
}
}
}`
Renaming UDataRegistry::TimerUpdate() to something else fixes the issue
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