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Author SHA1 Message Date
Sander de Smalen
7c65d2288b [AArch64] Improve access to fixed-width object when stack has SVE. 
When the stack has SVE objects, fixed-width objects are often better accessed
from the SP, instead of the FP, because part/all of the fixed-width offset
can be folded into the (non-scalable) addressing mode, where otherwise an
ADDVL would be required.

Reviewed By: david-arm

Differential Revision: https://reviews.llvm.org/D120738
 2022-03-04 09:33:59 +00:00
Jay Foad
f510045d82 [CodeGen] Remove unneeded regex escaping in FileCheck patterns. NFC. 
Take advantage of D117117 to simplify all {{\[}} to [ and {{\]}} to ].

Differential Revision: https://reviews.llvm.org/D117298
 2022-02-18 16:10:56 +00:00
John Brawn
dc9f65be45 [AArch64][SVE] Fix handling of stack protection with SVE 
Fix a couple of things that were causing stack protection to not work
correctly in functions that have scalable vectors on the stack:
 * Use TypeSize when determining if accesses to a variable are
   considered out-of-bounds so that the behaviour is correct for
   scalable vectors.
 * When stack protection is enabled move the stack protector location
   to the top of the SVE locals, so that any overflow in them (or the
   other locals which are below that) will be detected.

Fixes: https://github.com/llvm/llvm-project/issues/51137

Differential Revision: https://reviews.llvm.org/D111631
 2021-12-14 11:30:48 +00:00