Assertion failed 'varTypeIsStruct(TypeGet())' during 'Optimize Valnum CSEs'

[EgorBo]

Failing in runtime-coreclr jitstress-isas-x86
e.g.

https://helixre107v0xdcypoyl9e7f.blob.core.windows.net/dotnet-runtime-refs-pull-84946-merge-ee46ebab9be144078a/Regression_2/1/console.bd4bc3aa.log?helixlogtype=result

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Issue Details

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Failing in runtime-coreclr jitstress-isas-x86
e.g.

https://helixre107v0xdcypoyl9e7f.blob.core.windows.net/dotnet-runtime-refs-pull-84946-merge-ee46ebab9be144078a/Regression_2/1/console.bd4bc3aa.log?helixlogtype=result

Author:	EgorBo
Assignees:	-
Labels:	area-CodeGen-coreclr, untriaged
Milestone:	-

[JulieLeeMSFT]

@jakobbotsch Please take a look. It happens in Antigen and other tests as well.

[jakobbotsch]

This test sets JitOptRepeat=*. It ends up with the IR shape

N008 (  5,  6) CSE #03 (def)[000395] -----------                         ▌  COMMA     struct $3c3
N006 (  5,  6) CSE #02 (use)[000394] -----------                         ├──▌  COMMA     int    $180
N004 (  1,  1)              [000393] -----------                         │  ├──▌  LCL_VAR   int    V57 tmp45        u:1 (last use) $180
N005 (  3,  4)              [000392] -------N---                         │  └──▌  LCL_FLD   int    V01 loc0         u:1[+8] (last use) $180
N007 (  0,  0)              [000234] -----------                         └──▌  NOP       void   $3c3

after liveness where CSE gets confused about the mismatched types.