From 843164242e99a8377ac04212654531eb2b68ca99 Mon Sep 17 00:00:00 2001
From: Alexandros Lamprineas <alexandros.lamprineas@arm.com>
Date: Thu, 10 Mar 2016 17:38:41 +0000
Subject: [PATCH] [ARM] Cortex-R8 support

This patch adds Cortex-R8 to Target Parser and TableGen.
It also adds CodeGen tests for the build attributes.

Patch by Pablo Barrio.

Differential Revision: http://reviews.llvm.org/D17925

llvm-svn: 263132
---
 llvm/include/llvm/Support/ARMTargetParser.def |  2 ++
 llvm/lib/Target/ARM/ARM.td                    | 12 +++++++
 llvm/test/CodeGen/ARM/build-attributes.ll     | 31 +++++++++++++++++++
 3 files changed, 45 insertions(+)

diff --git a/llvm/include/llvm/Support/ARMTargetParser.def b/llvm/include/llvm/Support/ARMTargetParser.def
index 6f2f86e0db25..7fe4fd262dae 100644
--- a/llvm/include/llvm/Support/ARMTargetParser.def
+++ b/llvm/include/llvm/Support/ARMTargetParser.def
@@ -209,6 +209,8 @@ ARM_CPU_NAME("cortex-r5", AK_ARMV7R, FK_VFPV3_D16, false,
              (AEK_MP | AEK_HWDIVARM))
 ARM_CPU_NAME("cortex-r7", AK_ARMV7R, FK_VFPV3_D16_FP16, false,
              (AEK_MP | AEK_HWDIVARM))
+ARM_CPU_NAME("cortex-r8", AK_ARMV7R, FK_VFPV3_D16_FP16, false,
+             (AEK_MP | AEK_HWDIVARM))
 ARM_CPU_NAME("sc300", AK_ARMV7M, FK_NONE, false, AEK_NONE)
 ARM_CPU_NAME("cortex-m3", AK_ARMV7M, FK_NONE, true, AEK_NONE)
 ARM_CPU_NAME("cortex-m4", AK_ARMV7EM, FK_FPV4_SP_D16, true, AEK_NONE)
diff --git a/llvm/lib/Target/ARM/ARM.td b/llvm/lib/Target/ARM/ARM.td
index fa6e6c71a1df..b92e941bf029 100644
--- a/llvm/lib/Target/ARM/ARM.td
+++ b/llvm/lib/Target/ARM/ARM.td
@@ -627,6 +627,18 @@ def : ProcessorModel<"cortex-r7",   CortexA8Model,      [ARMv7r, ProcR7,
                                                          FeatureAvoidPartialCPSR,
                                                          FeatureT2XtPk]>;
 
+def : ProcessorModel<"cortex-r8",   CortexA8Model,      [ARMv7r,
+                                                         FeatureHasRAS,
+                                                         FeatureVFP3,
+                                                         FeatureD16,
+                                                         FeatureFP16,
+                                                         FeatureMP,
+                                                         FeatureSlowFPBrcc,
+                                                         FeatureHWDivARM,
+                                                         FeatureHasSlowFPVMLx,
+                                                         FeatureAvoidPartialCPSR,
+                                                         FeatureT2XtPk]>;
+
 def : ProcNoItin<"cortex-m3",                           [ARMv7m]>;
 def : ProcNoItin<"sc300",                               [ARMv7m]>;
 
diff --git a/llvm/test/CodeGen/ARM/build-attributes.ll b/llvm/test/CodeGen/ARM/build-attributes.ll
index 6b1b59dcac26..cd843ecc34ca 100644
--- a/llvm/test/CodeGen/ARM/build-attributes.ll
+++ b/llvm/test/CodeGen/ARM/build-attributes.ll
@@ -105,6 +105,9 @@
 ; RUN: llc < %s -mtriple=armv7r-linux-gnueabi -mcpu=cortex-r7 | FileCheck %s --check-prefix=CORTEX-R7
 ; RUN: llc < %s -mtriple=armv7r-linux-gnueabi -mcpu=cortex-r7  -enable-unsafe-fp-math -disable-fp-elim -enable-no-infs-fp-math -enable-no-nans-fp-math -fp-contract=fast | FileCheck %s --check-prefix=CORTEX-R7-FAST
 ; RUN: llc < %s -mtriple=armv7r-linux-gnueabi -mcpu=cortex-r7 -enable-sign-dependent-rounding-fp-math | FileCheck %s --check-prefix=DYN-ROUNDING
+; RUN: llc < %s -mtriple=armv7r-linux-gnueabi -mcpu=cortex-r8 | FileCheck %s --check-prefix=CORTEX-R8
+; RUN: llc < %s -mtriple=armv7r-linux-gnueabi -mcpu=cortex-r8  -enable-unsafe-fp-math -disable-fp-elim -enable-no-infs-fp-math -enable-no-nans-fp-math -fp-contract=fast | FileCheck %s --check-prefix=CORTEX-R8-FAST
+; RUN: llc < %s -mtriple=armv7r-linux-gnueabi -mcpu=cortex-r8 -enable-sign-dependent-rounding-fp-math | FileCheck %s --check-prefix=DYN-ROUNDING
 ; RUN: llc < %s -mtriple=armv8-linux-gnueabi -mcpu=cortex-a35 | FileCheck %s --check-prefix=CORTEX-A35
 ; RUN: llc < %s -mtriple=armv8-linux-gnueabi -mcpu=cortex-a35  -enable-unsafe-fp-math -disable-fp-elim -enable-no-infs-fp-math -enable-no-nans-fp-math -fp-contract=fast | FileCheck %s --check-prefix=CORTEX-A35-FAST
 ; RUN: llc < %s -mtriple=armv8-linux-gnueabi -mcpu=cortex-a35 -enable-sign-dependent-rounding-fp-math | FileCheck %s --check-prefix=DYN-ROUNDING
@@ -1215,6 +1218,34 @@
 ; CORTEX-R7-FAST-NOT:  .eabi_attribute 22
 ; CORTEX-R7-FAST:  .eabi_attribute 23, 1
 
+; CORTEX-R8:  .cpu cortex-r8
+; CORTEX-R8:  .eabi_attribute 6, 10
+; CORTEX-R8:  .eabi_attribute 7, 82
+; CORTEX-R8:  .eabi_attribute 8, 1
+; CORTEX-R8:  .eabi_attribute 9, 2
+; CORTEX-R8:  .fpu vfpv3-d16-fp16
+; CORTEX-R8-NOT:   .eabi_attribute 19
+;; We default to IEEE 754 compliance
+; CORTEX-R8:  .eabi_attribute 20, 1
+; CORTEX-R8:  .eabi_attribute 21, 1
+; CORTEX-R8-NOT:  .eabi_attribute 22
+; CORTEX-R8:  .eabi_attribute 23, 3
+; CORTEX-R8:  .eabi_attribute 24, 1
+; CORTEX-R8:  .eabi_attribute 25, 1
+; CORTEX-R8-NOT:  .eabi_attribute 28
+; CORTEX-R8:  .eabi_attribute 36, 1
+; CORTEX-R8:  .eabi_attribute 38, 1
+; CORTEX-R8:  .eabi_attribute 42, 1
+; CORTEX-R8:  .eabi_attribute 44, 2
+; CORTEX-R8-NOT:  .eabi_attribute 68
+
+; CORTEX-R8-FAST-NOT:   .eabi_attribute 19
+;; The R8 has the VFPv3 FP unit, which always flushes preserving sign.
+; CORTEX-R8-FAST:  .eabi_attribute 20, 2
+; CORTEX-R8-FAST-NOT:  .eabi_attribute 21
+; CORTEX-R8-FAST-NOT:  .eabi_attribute 22
+; CORTEX-R8-FAST:  .eabi_attribute 23, 1
+
 ; CORTEX-A35:  .cpu cortex-a35
 ; CORTEX-A35:  .eabi_attribute 6, 14
 ; CORTEX-A35:  .eabi_attribute 7, 65
-- 
2.34.1