Nikita Popov 6b76c1e64c [SCCP] Add support for vectors (#98026) ...

Add preliminary support for vectors of integers by using the
`ValueLatticeElement::asConstantRange()` helper instead of a custom
implementation, and relxing various integer type checks.

This enables just the part that works automatically, e.g. icmps with a
constant vector operand aren't supported yet.

The change in ssa.copy handling is because asConstantRange() returns an
unknown LV for empty range, while SCCP's getConstantRange() returned a
full range. I've made the change to preserve the existing behavior.

2024-07-09 12:25:53 +02:00

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