| Issue |
143606
|
| Summary |
[X86] 454.calculix miscompare after #143017
|
| Labels |
backend:X86
|
| Assignees |
RKSimon
|
| Reporter |
vzakhari
|
This may not be reprodusible with the upstream Flang, because I have a customized LLVM pipeline that runs some extra passes. At the same time, I can confirm that #143017 causes the miscompare by reverting it.
The only change in the whole benchmark appears in `stiff2mat.f` module that contains a single function.
Attaching the assembly for `stiff2mat.f`:
* With #143017: [bad.s.gz](https://github.com/user-attachments/files/20680266/bad.s.gz)
* Without #143017: [good.s.gz](https://github.com/user-attachments/files/20680273/good.s.gz)
Here is the LLVM IR and MIR dumps right before and afrer `x86-isel`:
* With #143017: [isel.bad.log.gz](https://github.com/user-attachments/files/20680318/isel.bad.log.gz)
* Without #143017: [isel.good.log.gz](https://github.com/user-attachments/files/20680321/isel.good.log.gz)
Please let me know if you need information from more passes.
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