| Issue |
143088
|
| Summary |
[META][X86] Remove unnecessary x86 code from DAG/X86ISelLowering
|
| Labels |
backend:X86,
code-cleanup,
code-quality
|
| Assignees |
|
| Reporter |
RKSimon
|
Meta ticket to track ongoing work to move unnecessary code out of x86 DAG lowering to the middle end (vectorisation etc.) or later fixup passes.
The aims of this include:
- Remove outdated codegen that the middle end no longer generates
- Better alternatives to determine optimal code for given CPU targets (TTI cost tables, MachineCombiner, X86Fixup passes etc.).
- Avoids GISel having to reimplement unnecessary codegen
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