| Issue |
164169
|
| Summary |
[Inline][WinEH] Miscompilation due to inlining of unterminated try scopes
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
MuellerMP
|
When inlining functions in C++ files compiled with -EHa try scopes can be mistakenly leaked over to the caller:
https://godbolt.org/z/8Gbqd6Gha
This can sadly not be executed in godbolt itself but we can see the issue when looking at the exception information for `?test@@YAHH@Z`:
Labels `.Ltmp14` to `.Ltmp12` are referenced in the `ip2state` map and declare a unwinding region with state 0.
`tryMap` + `handlerMap` are describing that an exception occuring in the region has the unwind destination `?catch$3@?0??test@@YAHH@Z@4HA`.
This unwind destination can be clearly identified as the catch clause of `ExitOnThrow`.
The region (`.Ltmp14` to `.Ltmp12`) also erroneously contains the call to `DoThrow` which should not be covered by the try scope of `ExitOnThrow`.
When compiling this with MSVC we get the correct returncode 3:
https://godbolt.org/z/Y6q1f8rY4
When compiling this with clang-cl (trunk) locally we get the false returncode 2 instead.
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