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[DXIL] Null pointer exception due to double floating-point literals in fmod intrinsic (in 1.8.2403 release) #6419

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damyanp opened this issue Mar 14, 2024 · 1 comment · Fixed by #6418
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[DXIL] Null pointer exception due to double floating-point literals in fmod intrinsic (in 1.8.2403 release) #6419

damyanp opened this issue Mar 14, 2024 · 1 comment · Fixed by #6418
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@tex3d
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rca Candidate for a root cause analysis discussion sm6.8 Shader Model 6.8
Milestone
Release 1.8.2403.1

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@damyanp
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damyanp commented Mar 14, 2024

This issue tracks #6410, but specifically in the release branch. See the main issue for full information.
@damyanp damyanp added this to the Release 1.8.2403.1 milestone Mar 14, 2024
@damyanp damyanp linked a pull request Mar 14, 2024 that will close this issue
Revert "Fix crash in DXIL.dll caused by illegal DXIL intrinsic. (#6302) (#6342)" #6418
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@damyanp damyanp mentioned this issue Mar 14, 2024
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@tex3d tex3d mentioned this issue Mar 14, 2024
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tex3d added a commit that referenced this issue Mar 14, 2024
@tex3d
Revert "Fix crash in DXIL.dll caused by illegal DXIL intrinsic. (#6302)…
11ee8de 
… (#6342)" (#6418)

This file deleted with conflicts from subsequent changes:
  tools/clang/test/LitDXILValidation/illegalDXILOp.ll

This reverts commit 487080f.

Fixes #6419.
@damyanp damyanp added the rca Candidate for a root cause analysis discussion label Mar 15, 2024
@tex3d tex3d mentioned this issue Mar 20, 2024
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tex3d added a commit that referenced this issue Mar 21, 2024
@tex3d
Add tests for literal overloads of fmod, length, and normalize (#6437)
9c2b828 
Certain HL ops with no double overload will generate double overloads
for literal types. These are lowered to double DXIL overloads, some of
which are not legal for these ops. We currently rely on illegal
intermediate DXIL op overloads for constant evaluation. If constant
evaluation fails, we end up with illegal DXIL overloads in final DXIL,
which is caught by the validator.

The prior revert restored the ability to run these scenarios (with
asserts disabled).

This change adds tests for #6419 so automated testing will test across
configurations and prevent regressions of this scenario in this branch.
@damyanp
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damyanp commented Mar 22, 2024

Fixed by #6418

@damyanp damyanp closed this as completed Mar 22, 2024
@pow2clk pow2clk added the sm6.8 Shader Model 6.8 label Mar 28, 2024
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@tex3d tex3d

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rca Candidate for a root cause analysis discussion sm6.8 Shader Model 6.8
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Status: Done
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Release 1.8.2403.1
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@tex3d @damyanp @pow2clk