Benjamin Maxwell 5899bca6ba
[AArch64][SME] Resume streaming-mode on entry to exception handlers (#156638)
This patch adds a new `TargetLowering` hook `lowerEHPadEntry()` that is
called at the start of lowering EH pads in SelectionDAG. This allows the
insertion of target-specific actions on entry to exception handlers.

This is used on AArch64 to insert SME streaming-mode switches at landing
pads. This is needed as exception handlers are always entered with
PSTATE.SM off, and the function needs to resume the streaming mode of
the function body.
2025-09-04 12:55:12 +01:00
..
2025-08-11 07:41:38 +01:00
2025-03-30 16:38:16 -07:00

++ SVE CodeGen Warnings ++

When the WARN check lines fail in the SVE codegen tests it most likely means you
have introduced a warning due to:
1. Adding an invalid call to VectorType::getNumElements() or EVT::getVectorNumElements()
   when the type is a scalable vector.
2. Relying upon an implicit cast conversion from TypeSize to uint64_t.

For generic code, please modify your code to work with ElementCount and TypeSize directly.
For target-specific code that only deals with fixed-width vectors, use the fixed-size interfaces.
Please refer to the code where those functions live for more details.