| Issue |
168849
|
| Summary |
Compile time regression after #154336
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
piotrAMD
|
https://github.com/llvm/llvm-project/pull/154336 causes some drastic compile time regressions for AMDGPU. In one real world case compilation time jumped from a fraction of second to over 1 hour, where most of the time is spent in the instcombine.
Here's the simplified reproducer [repro.txt](https://github.com/user-attachments/files/23651801/repro.txt):
$ time ./opt_fail -passes="instcombine" -disable-output repro.txt
real 0m3,221s
user 0m3,208s
sys 0m0,013s
$ time ./opt_pass -passes="instcombine" -disable-output repro.txt
real 0m0,017s
user 0m0,008s
sys 0m0,009s
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