| Issue |
132464
|
| Summary |
[MC] Regression regarding .safeseh in inline assembly
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
mstorsjo
|
CC @MaskRay @lhmouse
There are two closely related regressions in the MC layer, since LLVM 19, regaring using `.safeseh` in inline assembly.
With the following reduced testcase as input:
```c
int foo(void) {
__asm__(".safeseh my_handler");
return 0;
}
```
Compiled like this:
```
$ clang -target i686-windows-msvc test.c -g
```
Before e48c4011ca80385573f1b92793c75dc98abb228f ([MC] Cache current fragment in MCStreamer), this runs succesfully. After that commit, it fails, triggering a failed assert:
```
clang: llvm/lib/MC/MCObjectStreamer.cpp:146: MCFragment *llvm::MCObjectStreamer::getCurrentFragment() const: Assertion `CurFrag->getParent() == getCurrentSection().first' failed.
```
If building with asserts disabled, it still succeeds, but closely thereafter, after 626eef5ecf92e98cbfccfa6134e0a760e7592813 ([MC] Optimize getCurrentSectionOnly using CurFrag and make it non-nullable), it also fails in a no-assert build, with the following error:
```
error: all .cv_loc directives for a function must be in the same section
```
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