From a16667e79be9164943dd76235d5406ae519b9042 Mon Sep 17 00:00:00 2001
From: Sam Parker <sam.parker@arm.com>
Date: Thu, 25 Oct 2018 15:08:29 +0000
Subject: [PATCH] [ARM] Use Cortex-A57 sched model for Cortex-A72

This mirrors what we already do for AArch64 as the cores are similar.
As discussed in the review, enabling the machine scheduler causes
more variations in performance changes so it is not enabled for now.
This patch improves LNT scores by a geomean of 1.57% at -O3.

Differential Revision: https://reviews.llvm.org/D53562

llvm-svn: 345272
---
 llvm/lib/Target/ARM/ARM.td                            | 2 +-
 llvm/test/Transforms/LoopUnroll/ARM/loop-unrolling.ll | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Target/ARM/ARM.td b/llvm/lib/Target/ARM/ARM.td
index fc23495..b71a098 100644
--- a/llvm/lib/Target/ARM/ARM.td
+++ b/llvm/lib/Target/ARM/ARM.td
@@ -1043,7 +1043,7 @@ def : ProcessorModel<"cortex-a57",  CortexA57Model,     [ARMv8a, ProcA57,
                                                          FeatureAvoidPartialCPSR,
                                                          FeatureCheapPredicableCPSR]>;
 
-def : ProcNoItin<"cortex-a72",                          [ARMv8a, ProcA72,
+def : ProcessorModel<"cortex-a72",  CortexA57Model,     [ARMv8a, ProcA72,
                                                          FeatureHWDivThumb,
                                                          FeatureHWDivARM,
                                                          FeatureCrypto,
diff --git a/llvm/test/Transforms/LoopUnroll/ARM/loop-unrolling.ll b/llvm/test/Transforms/LoopUnroll/ARM/loop-unrolling.ll
index c159a88..bb5277b 100644
--- a/llvm/test/Transforms/LoopUnroll/ARM/loop-unrolling.ll
+++ b/llvm/test/Transforms/LoopUnroll/ARM/loop-unrolling.ll
@@ -1,5 +1,6 @@
 ; RUN: opt -mtriple=armv7 -mcpu=cortex-a57 -loop-unroll -S %s -o - | FileCheck %s --check-prefix=CHECK-UNROLL-A
 ; RUN: opt -mtriple=thumbv7 -mcpu=cortex-a57 -loop-unroll -S %s -o - | FileCheck %s --check-prefix=CHECK-UNROLL-A
+; RUN: opt -mtriple=thumbv7 -mcpu=cortex-a72 -loop-unroll -S %s -o - | FileCheck %s --check-prefix=CHECK-UNROLL-A
 ; RUN: opt -mtriple=thumbv8m -mcpu=cortex-m23 -loop-unroll -S %s -o - | FileCheck %s --check-prefix=CHECK-UNROLL-T1
 ; RUN: opt -mtriple=thumbv8m.main -mcpu=cortex-m33 -loop-unroll -S %s -o - | FileCheck %s --check-prefix=CHECK-UNROLL-T2
 ; RUN: opt -mtriple=thumbv7em -mcpu=cortex-m7 -loop-unroll -S %s -o - | FileCheck %s --check-prefix=CHECK-UNROLL-T2
-- 
2.7.4