[release/6.0] Fix incorrect VN when folding GT_NEG(GT_MUL(A, C)) #57686
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ghost
added
the
area-CodeGen-coreclr
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Tagging subscribers to this area: @JulieLeeMSFT Issue DetailsBackport of #57651 to release/6.0 /cc @jakobbotsch Customer ImpactTestingRisk
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jeffschwMSFT
approved these changes
Aug 19, 2021
EgorBo
approved these changes
Aug 19, 2021
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Backport of #57651 to release/6.0
/cc @jakobbotsch
Customer Impact
Results in silent bad codegen with certain programming constructs, however the case was found by automated test case generation and not a customer.
Testing
Regression tests are included in the PR.
Risk
Low, this is a targeted fix that updates the stale data leading to the bad codegen.