JIT: Check for OperConsumesFlags in new OptimizeCallIndirectTargetEvaluation#122292
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jakobbotsch merged 3 commits intodotnet:mainfrom Dec 9, 2025
Merged
JIT: Check for OperConsumesFlags in new OptimizeCallIndirectTargetEvaluation#122292jakobbotsch merged 3 commits intodotnet:mainfrom
OperConsumesFlags in new OptimizeCallIndirectTargetEvaluation#122292jakobbotsch merged 3 commits intodotnet:mainfrom
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Consider these to interfere with all other nodes.
This reverts commit 8bbdefb.
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Pull request overview
This PR fixes issue #122289 by adding a check for nodes that consume CPU flags before reordering them in the OptimizeCallIndirectTargetEvaluation function. The fix prevents incorrect code generation that could occur when nodes consuming flags are reordered relative to the nodes that set those flags.
- Adds
OperConsumesFlags()check to prevent unsafe node reordering - Uses a localized fix rather than a more conservative approach that caused regressions
- Follows existing patterns used in similar reordering checks in the codebase
AndyAyersMS
approved these changes
Dec 8, 2025
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Fix #122289
Didn't add the regression test because it will be broken by #122023.
I also tried adding conservative handling to
SideEffectSetfor the situation (see earlier commit), but that introduced a lot of regressions in cases where the reordering is ok, so I went with a more localized fix here.