Matthias Braun cd19af74c0 Avoid 8 and 16bit switch conditions on x86 ...

This adds a `TargetLoweringBase::getSwitchConditionType` callback to
give targets a chance to control the type used in
`CodeGenPrepare::optimizeSwitchInst`.

Implement callback for X86 to avoid i8 and i16 types where possible as
they often incur extra zero-extensions.

This is NFC for non-X86 targets.

Differential Revision: https://reviews.llvm.org/D124894

2022-05-10 10:00:10 -07:00

86 KiB

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