[AArch64] Initial sched model for Neoverse N3

References:

* Arm Neoverse N3 Software Optimization Guide
* Arm A64 Instruction Set for A-profile architecture

Author: FLZ101

clang/test/Misc/target-invalid-cpu-note/arm.c

@@ -88,6 +88,7 @@
 // CHECK-SAME: {{^}}, cortex-x1c
 // CHECK-SAME: {{^}}, neoverse-n1
 // CHECK-SAME: {{^}}, neoverse-n2
+// CHECK-SAME: {{^}}, neoverse-n3
 // CHECK-SAME: {{^}}, neoverse-v1
 // CHECK-SAME: {{^}}, cyclone
 // CHECK-SAME: {{^}}, exynos-m3

llvm/include/llvm/TargetParser/ARMTargetParser.def

@@ -380,6 +380,9 @@ ARM_CPU_NAME("neoverse-n1", ARMV8_2A, FK_CRYPTO_NEON_FP_ARMV8, false,
 ARM_CPU_NAME("neoverse-n2", ARMV9A, FK_NEON_FP_ARMV8, false,
              (ARM::AEK_BF16 | ARM::AEK_DOTPROD | ARM::AEK_FP16FML |
               ARM::AEK_I8MM | ARM::AEK_RAS | ARM::AEK_SB ))
+ARM_CPU_NAME("neoverse-n3", ARMV9_2A, FK_NEON_FP_ARMV8, false,
+             (ARM::AEK_BF16 | ARM::AEK_DOTPROD | ARM::AEK_FP16FML |
+              ARM::AEK_I8MM | ARM::AEK_RAS | ARM::AEK_SB ))
 ARM_CPU_NAME("neoverse-v1", ARMV8_4A, FK_CRYPTO_NEON_FP_ARMV8, false,
              (ARM::AEK_RAS | ARM::AEK_FP16 | ARM::AEK_BF16 | ARM::AEK_DOTPROD))
 ARM_CPU_NAME("cyclone", ARMV8A, FK_CRYPTO_NEON_FP_ARMV8, false, ARM::AEK_CRC)

llvm/lib/Target/AArch64/AArch64.td

@@ -112,6 +112,7 @@ include "AArch64SchedAmpere1.td"
 include "AArch64SchedAmpere1B.td"
 include "AArch64SchedNeoverseN1.td"
 include "AArch64SchedNeoverseN2.td"
+include "AArch64SchedNeoverseN3.td"
 include "AArch64SchedNeoverseV1.td"
 include "AArch64SchedNeoverseV2.td"
 include "AArch64SchedOryon.td"

llvm/lib/Target/AArch64/AArch64Processors.td

@@ -1127,7 +1127,7 @@ def : ProcessorModel<"neoverse-n1", NeoverseN1Model,
 def : ProcessorModel<"neoverse-n2", NeoverseN2Model,
                      ProcessorFeatures.NeoverseN2, [TuneNeoverseN2]>;
 def : ProcessorAlias<"cobalt-100", "neoverse-n2">;
-def : ProcessorModel<"neoverse-n3", NeoverseN2Model,
+def : ProcessorModel<"neoverse-n3", NeoverseN3Model,
                      ProcessorFeatures.NeoverseN3, [TuneNeoverseN3]>;
 def : ProcessorModel<"neoverse-512tvb", NeoverseV1Model,
                      ProcessorFeatures.Neoverse512TVB, [TuneNeoverse512TVB]>;