| Issue |
110631
|
| Summary |
[Instcombine] -instcombine-verify-known-bits failure:s
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
JonPsson1
|
Posting a few more of these:
[tcs_instcombver.tar.gz](https://github.com/user-attachments/files/17200237/tcs_instcombver.tar.gz)
```
opt -mtriple=systemz-unknown -O3 tc_crash1_aftercreduce.ll -instcombine-verify-known-bits -o /dev/null
Mismatched known bits for %2 = zext nneg i32 %0 to i64 in
computeKnownBits(): 000000000000000000000000000000000000000000000000????????????????
SimplifyDemandedBits(): 000000000000000000000000000000000???????????????????????????????
opt -mtriple=systemz-unknown -O3 tc_crash2_aftercreduce.ll -instcombine-verify-known-bits -o /dev/null
Mismatched known bits for %3 = xor i32 %0, 48991 in
computeKnownBits(): 000000000000000010111111????????
SimplifyDemandedBits(): ????????????????????????????????
opt -mtriple=systemz-unknown -O3 tc_crash8_aftercreduce.ll -instcombine-verify-known-bits -o /dev/null
Mismatched known bits for %5 = and i64 %0, %4 in
computeKnownBits(): 00000000000000000000000000000000????????????????????????????????
SimplifyDemandedBits(): ????????????????????????????????????????????????????????????????
opt -mtriple=systemz-unknown -O3 tc_crash9_aftercreduce.ll -instcombine-verify-known-bits -o /dev/null
Mismatched known bits for %4 = or disjoint i32 %0, 30 in
computeKnownBits(): 0000000000000000000000000001111?
SimplifyDemandedBits(): ???????????????????????????1111?
```
@RKSimon @jf-botto @nikic @artagnon
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