[llvm-branch-commits] [llvm] 7d803c8 - [AArch64] Set the cache line size to 64 for the V2 and V3. (#148213)

[Tobias Hieta via llvm-branch-commits]

Author: Sjoerd Meijer
Date: 2025-07-16T16:17:00+02:00
New Revision: 7d803c868ab96dabbd4cb47d0b3e60a78057e1b0

URL: https://github.com/llvm/llvm-project/commit/7d803c868ab96dabbd4cb47d0b3e60a78057e1b0
DIFF: https://github.com/llvm/llvm-project/commit/7d803c868ab96dabbd4cb47d0b3e60a78057e1b0.diff

LOG: [AArch64] Set the cache line size to 64 for the V2 and V3. (#148213)

This sets the cache line size to 64 for the Neoverse V2 and V3. I've
tested this with loop-interchange: it doesn't result in extra
compile-times, but it does enable a lot more interchange.

Added: 
    

Modified: 
    llvm/lib/Target/AArch64/AArch64Subtarget.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/AArch64/AArch64Subtarget.cpp b/llvm/lib/Target/AArch64/AArch64Subtarget.cpp
index 0956823346795..2409cc862f21c 100644
--- a/llvm/lib/Target/AArch64/AArch64Subtarget.cpp
+++ b/llvm/lib/Target/AArch64/AArch64Subtarget.cpp
@@ -270,6 +270,7 @@ void AArch64Subtarget::initializeProperties(bool HasMinSize) {
     break;
   case NeoverseV2:
   case NeoverseV3:
+    CacheLineSize = 64;
     EpilogueVectorizationMinVF = 8;
     MaxInterleaveFactor = 4;
     ScatterOverhead = 13;