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[AArch64] __builtin_return_address for PAuth.

Authored by danielkiss on Sep 24 2020, 11:24 AM.

Description

[AArch64] __builtin_return_address for PAuth.

This change adds the support for __builtin_return_address
for ARMv8.3A Pointer Authentication.
Location of the authentication code in the pointer depends on
the system configuration, therefore a dedicated instruction is used for
effectively removing the authentication code without
authenticating the pointer.

Reviewed By: chill

Differential Revision: https://reviews.llvm.org/D75044

Details

Committed
danielkissSep 24 2020, 2:23 PM
Reviewer
chill
Differential Revision
D75044: [AArch64] __builtin_return_address for PAuth.
Parents
rG0a925a813a50: [mlir][NFC] Promote memory space to BaseMemRefType
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