Add ARM Cortex-A32 support

[samparker]

Summary

Hi,

This patch adds the Cortex-A32 as an available target in the ARM backend.

Cheers,
sam

[jmolloy]

Hi Sam,

LGTM with one comment.

Cheers,

James

test/CodeGen/ARM/build-attributes.ll

1278

Copypasta error? A35 -> A32?

[samparker]

Corrected typo that James pointed out.

[jmolloy]

LGTM

[samparker]

James, would you be able to commit this for me?

[samparker]

Combined the two diffs.

[rengolin]

Committed in r263956.

include/llvm/Support/ARMTargetParser.def

 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)
 ARM_CPU_NAME("cortex-m7", AK_ARMV7EM, FK_FPV5_D16, false, AEK_NONE)
+ARM_CPU_NAME("cortex-a32", AK_ARMV8A, FK_CRYPTO_NEON_FP_ARMV8, false, AEK_CRC)
 ARM_CPU_NAME("cortex-a35", AK_ARMV8A, FK_CRYPTO_NEON_FP_ARMV8, false, AEK_CRC)
 ARM_CPU_NAME("cortex-a53", AK_ARMV8A, FK_CRYPTO_NEON_FP_ARMV8, true, AEK_CRC)
 ARM_CPU_NAME("cortex-a57", AK_ARMV8A, FK_CRYPTO_NEON_FP_ARMV8, false, AEK_CRC)

lib/Target/ARM/ARM.td

                                    "Cortex-A15 ARM processors", []>;
 def ProcA17     : SubtargetFeature<"a17", "ARMProcFamily", "CortexA17",
                                    "Cortex-A17 ARM processors", []>;
+def ProcA32     : SubtargetFeature<"a32", "ARMProcFamily", "CortexA32",
+                                   "Cortex-A32 ARM processors", []>;
 def ProcA35     : SubtargetFeature<"a35", "ARMProcFamily", "CortexA35",
                                    "Cortex-A35 ARM processors", []>;
 def ProcA53     : SubtargetFeature<"a53", "ARMProcFamily", "CortexA53",

                                                          FeatureFPARMv8,
                                                          FeatureD16]>;
 
+def : ProcNoItin<"cortex-a32",                           [ARMv8a,
+                                                         FeatureHWDiv,
+                                                         FeatureHWDivARM,
+                                                         FeatureT2XtPk,
+                                                         FeatureCrypto,
+                                                         FeatureCRC]>;
 
 def : ProcNoItin<"cortex-a35",                          [ARMv8a, ProcA35,
                                                          FeatureHWDiv,

lib/Target/ARM/ARMSubtarget.h

 protected:
   enum ARMProcFamilyEnum {
     Others, CortexA5, CortexA7, CortexA8, CortexA9, CortexA12, CortexA15,
-    CortexA17, CortexR4, CortexR4F, CortexR5, CortexR7, CortexA35, CortexA53,
-    CortexA57, CortexA72, Krait, Swift, ExynosM1
+    CortexA17, CortexR4, CortexR4F, CortexR5, CortexR7, CortexA32, CortexA35,
+    CortexA53, CortexA57, CortexA72, Krait, Swift, ExynosM1
   };
   enum ARMProcClassEnum {
     None, AClass, RClass, MClass

test/CodeGen/ARM/build-attributes.ll

 ; 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-a32 | FileCheck %s --check-prefix=CORTEX-A32
+; RUN: llc < %s -mtriple=armv8-linux-gnueabi -mcpu=cortex-a32  -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-A32-FAST
+; RUN: llc < %s -mtriple=armv8-linux-gnueabi -mcpu=cortex-a32 -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

 ; RUN: llc < %s -mtriple=armv8.1a-none-linux-gnueabi -mattr=+strict-align | FileCheck %s --check-prefix=STRICT-ALIGN
 ; RUN: llc < %s -mtriple=armv8.1a-none-linux-gnueabi | FileCheck %s --check-prefix=NO-STRICT-ALIGN
 ; ARMv8a (AArch32)
+; RUN: llc < %s -mtriple=armv8-none-linux-gnueabi -mcpu=cortex-a32 | FileCheck %s --check-prefix=NO-STRICT-ALIGN
+; RUN: llc < %s -mtriple=armv8-none-linux-gnueabi -mcpu=cortex-a32 -mattr=+strict-align | FileCheck %s --check-prefix=STRICT-ALIGN
 ; RUN: llc < %s -mtriple=armv8-none-linux-gnueabi -mcpu=cortex-a35 | FileCheck %s --check-prefix=NO-STRICT-ALIGN
 ; RUN: llc < %s -mtriple=armv8-none-linux-gnueabi -mcpu=cortex-a35 -mattr=+strict-align | FileCheck %s --check-prefix=STRICT-ALIGN
 ; RUN: llc < %s -mtriple=armv8-none-linux-gnueabi -mcpu=cortex-a57 | FileCheck %s --check-prefix=NO-STRICT-ALIGN

 ; CORTEX-R8-FAST-NOT:  .eabi_attribute 22
 ; CORTEX-R8-FAST:  .eabi_attribute 23, 1
 
+; CORTEX-A32:  .cpu cortex-a32
+; CORTEX-A32:  .eabi_attribute 6, 14
+; CORTEX-A32:  .eabi_attribute 7, 65
+; CORTEX-A32:  .eabi_attribute 8, 1
+; CORTEX-A32:  .eabi_attribute 9, 2
+; CORTEX-A32:  .fpu crypto-neon-fp-armv8
+; CORTEX-A32:  .eabi_attribute 12, 3
+; CORTEX-A32-NOT:   .eabi_attribute 19
+;; We default to IEEE 754 compliance
+; CORTEX-A32:  .eabi_attribute 20, 1
+; CORTEX-A32:  .eabi_attribute 21, 1
+; CORTEX-A32-NOT:  .eabi_attribute 22
+; CORTEX-A32:  .eabi_attribute 23, 3
+; CORTEX-A32:  .eabi_attribute 24, 1
+; CORTEX-A32:  .eabi_attribute 25, 1
+; CORTEX-A32-NOT:  .eabi_attribute 27
+; CORTEX-A32-NOT:  .eabi_attribute 28
+; CORTEX-A32:  .eabi_attribute 36, 1
+; CORTEX-A32:  .eabi_attribute 38, 1
+; CORTEX-A32:  .eabi_attribute 42, 1
+; CORTEX-A32-NOT:  .eabi_attribute 44
+; CORTEX-A32:  .eabi_attribute 68, 3
+
+; CORTEX-A32-FAST-NOT:   .eabi_attribute 19
+;; The A32 has the ARMv8 FP unit, which always flushes preserving sign.
+; CORTEX-A32-FAST:  .eabi_attribute 20, 2
+; CORTEX-A32-FAST-NOT:  .eabi_attribute 21
+; CORTEX-A32-FAST-NOT:  .eabi_attribute 22
+; CORTEX-A32-FAST:  .eabi_attribute 23, 1
+
 ; CORTEX-A35:  .cpu cortex-a35
 ; CORTEX-A35:  .eabi_attribute 6, 14
 ; CORTEX-A35:  .eabi_attribute 7, 65