Sami Tolvanen e9569748de [CodeGen][KCFI] Move cfi-type lowering to TargetLowering ...

KCFI machine function passes transform indirect calls with a
cfi-type attribute into architecture-specific type checks bundled
together with the calls. Instead of having a separate pass for each
architecture, add a generic machine function pass for KCFI and
move the architecture-specific code that emits the actual check to
TargetLowering. This avoids unnecessary duplication and makes it
easier to add KCFI support to other architectures.

Reviewed By: nickdesaulniers

Differential Revision: https://reviews.llvm.org/D149915

2023-05-09 18:38:54 +00:00

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