[clang] [llvm] [ARM][AArch32] Add support for AArch32 Cortex-M52 CPU (PR #74822)
Jonathan Thackray via cfe-commits
cfe-commits at lists.llvm.org
Fri Dec 8 06:15:51 PST 2023
https://github.com/jthackray updated https://github.com/llvm/llvm-project/pull/74822
>From 5925f180b6a8623ae1f1497f89c1f6ef35517e4a Mon Sep 17 00:00:00 2001
From: Jonathan Thackray <jonathan.thackray at arm.com>
Date: Thu, 23 Nov 2023 15:54:01 +0000
Subject: [PATCH 1/5] [ARM][AArch32] Add support for AArch32 Cortex-M52 CPU
Cortex-M52 is an Armv8.1 AArch32 CPU.
Technical specifications available at:
https://developer.arm.com/processors/cortex-m52
---
clang/docs/ReleaseNotes.rst | 1 +
clang/test/CodeGen/arm-target-features.c | 3 +++
clang/test/Driver/arm-cortex-cpus-2.c | 3 +++
clang/test/Misc/target-invalid-cpu-note.c | 2 +-
llvm/docs/ReleaseNotes.rst | 2 +-
llvm/include/llvm/TargetParser/ARMTargetParser.def | 3 +++
llvm/lib/Target/ARM/ARM.td | 11 +++++++++++
llvm/lib/Target/ARM/ARMSubtarget.cpp | 1 +
llvm/lib/Target/ARM/ARMSubtarget.h | 1 +
llvm/lib/TargetParser/Host.cpp | 1 +
llvm/unittests/TargetParser/TargetParserTest.cpp | 8 +++++++-
11 files changed, 33 insertions(+), 3 deletions(-)
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 5c044658197139..6f3b6efbfe08c0 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -899,6 +899,7 @@ Arm and AArch64 Support
* Arm Cortex-A520 (cortex-a520).
* Arm Cortex-A720 (cortex-a720).
* Arm Cortex-X4 (cortex-x4).
+ * Arm Cortex-M52 (cortex-m52).
Android Support
^^^^^^^^^^^^^^^
diff --git a/clang/test/CodeGen/arm-target-features.c b/clang/test/CodeGen/arm-target-features.c
index bd051059fb0cc1..ad4bfd45c408b5 100644
--- a/clang/test/CodeGen/arm-target-features.c
+++ b/clang/test/CodeGen/arm-target-features.c
@@ -113,6 +113,9 @@
// RUN: %clang_cc1 -triple thumb-linux-gnueabi -target-cpu cortex-m85 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV81M-CORTEX-M85-LINUX
// CHECK-ARMV81M-CORTEX-M85-LINUX: "target-features"="+armv8.1-m.main,+dsp,+fp-armv8d16,+fp-armv8d16sp,+fp16,+fp64,+fullfp16,+hwdiv,+lob,+mve,+mve.fp,+pacbti,+ras,+thumb-mode,+vfp2,+vfp2sp,+vfp3d16,+vfp3d16sp,+vfp4d16,+vfp4d16sp"
+// RUN: %clang_cc1 -triple thumb-linux-gnueabi -target-cpu cortex-m52 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV81M-CORTEX-M52-LINUX
+// CHECK-ARMV81M-CORTEX-M52-LINUX: "target-features"="+armv8.1-m.main,+dsp,+fp-armv8d16,+fp-armv8d16sp,+fp16,+fp64,+fullfp16,+hwdiv,+lob,+mve,+mve.fp,+pacbti,+ras,+thumb-mode,+vfp2,+vfp2sp,+vfp3d16,+vfp3d16sp,+vfp4d16,+vfp4d16sp"
+
// RUN: %clang_cc1 -triple thumbv9.3a-linux-gnueabihf -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARCH93
// CHECK-ARCH93: "target-features"="+armv9.3-a,+thumb-mode,+v8.1a,+v8.2a,+v8.3a,+v8.4a,+v8.5a,+v8.6a,+v8.7a,+v8.8a,+v9.1a,+v9.2a,+v9.3a,+v9a"
diff --git a/clang/test/Driver/arm-cortex-cpus-2.c b/clang/test/Driver/arm-cortex-cpus-2.c
index 5b52488bc498f3..4bf2b3a50412d0 100644
--- a/clang/test/Driver/arm-cortex-cpus-2.c
+++ b/clang/test/Driver/arm-cortex-cpus-2.c
@@ -562,6 +562,9 @@
// RUN: %clang -target arm -mcpu=cortex-m85 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CORTEX-M85 %s
// CHECK-CORTEX-M85: "-cc1"{{.*}} "-triple" "thumbv8.1m.main-{{.*}} "-target-cpu" "cortex-m85"
+// RUN: %clang -target arm -mcpu=cortex-m52 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CORTEX-M52 %s
+// CHECK-CORTEX-M52: "-cc1"{{.*}} "-triple" "thumbv8.1m.main-{{.*}} "-target-cpu" "cortex-m52"
+
// RUN: %clang -target arm -mcpu=neoverse-n2 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-NEOVERSE-N2 %s
// CHECK-NEOVERSE-N2: "-cc1"{{.*}} "-triple" "armv8.5a-{{.*}}" "-target-cpu" "neoverse-n2"
diff --git a/clang/test/Misc/target-invalid-cpu-note.c b/clang/test/Misc/target-invalid-cpu-note.c
index c7146e63add5f2..f921c4605bb976 100644
--- a/clang/test/Misc/target-invalid-cpu-note.c
+++ b/clang/test/Misc/target-invalid-cpu-note.c
@@ -1,7 +1,7 @@
// Use CHECK-NEXT instead of multiple CHECK-SAME to ensure we will fail if there is anything extra in the output.
// RUN: not %clang_cc1 -triple armv5--- -target-cpu not-a-cpu -fsyntax-only %s 2>&1 | FileCheck %s --check-prefix ARM
// ARM: error: unknown target CPU 'not-a-cpu'
-// ARM-NEXT: note: valid target CPU values are: arm8, arm810, strongarm, strongarm110, strongarm1100, strongarm1110, arm7tdmi, arm7tdmi-s, arm710t, arm720t, arm9, arm9tdmi, arm920, arm920t, arm922t, arm940t, ep9312, arm10tdmi, arm1020t, arm9e, arm946e-s, arm966e-s, arm968e-s, arm10e, arm1020e, arm1022e, arm926ej-s, arm1136j-s, arm1136jf-s, mpcore, mpcorenovfp, arm1176jz-s, arm1176jzf-s, arm1156t2-s, arm1156t2f-s, cortex-m0, cortex-m0plus, cortex-m1, sc000, cortex-a5, cortex-a7, cortex-a8, cortex-a9, cortex-a12, cortex-a15, cortex-a17, krait, cortex-r4, cortex-r4f, cortex-r5, cortex-r7, cortex-r8, cortex-r52, sc300, cortex-m3, cortex-m4, cortex-m7, cortex-m23, cortex-m33, cortex-m35p, cortex-m55, cortex-m85, cortex-a32, cortex-a35, cortex-a53, cortex-a55, cortex-a57, cortex-a72, cortex-a73, cortex-a75, cortex-a76, cortex-a76ae, cortex-a77, cortex-a78, cortex-a78c, cortex-a710, cortex-x1, cortex-x1c, neoverse-n1, neoverse-n2, neoverse-v1, cyclone, exynos-m3, exynos-m4, exynos-m5, kryo, iwmmxt, xscale, swift{{$}}
+// ARM-NEXT: note: valid target CPU values are: arm8, arm810, strongarm, strongarm110, strongarm1100, strongarm1110, arm7tdmi, arm7tdmi-s, arm710t, arm720t, arm9, arm9tdmi, arm920, arm920t, arm922t, arm940t, ep9312, arm10tdmi, arm1020t, arm9e, arm946e-s, arm966e-s, arm968e-s, arm10e, arm1020e, arm1022e, arm926ej-s, arm1136j-s, arm1136jf-s, mpcore, mpcorenovfp, arm1176jz-s, arm1176jzf-s, arm1156t2-s, arm1156t2f-s, cortex-m0, cortex-m0plus, cortex-m1, sc000, cortex-a5, cortex-a7, cortex-a8, cortex-a9, cortex-a12, cortex-a15, cortex-a17, krait, cortex-r4, cortex-r4f, cortex-r5, cortex-r7, cortex-r8, cortex-r52, sc300, cortex-m3, cortex-m4, cortex-m7, cortex-m23, cortex-m33, cortex-m35p, cortex-m52, cortex-m55, cortex-m85, cortex-m52, cortex-a32, cortex-a35, cortex-a53, cortex-a55, cortex-a57, cortex-a72, cortex-a73, cortex-a75, cortex-a76, cortex-a76ae, cortex-a77, cortex-a78, cortex-a78c, cortex-a710, cortex-x1, cortex-x1c, neoverse-n1, neoverse-n2, neoverse-v1, cyclone, exynos-m3, exynos-m4, exynos-m5, kryo, iwmmxt, xscale, swift{{$}}
// RUN: not %clang_cc1 -triple arm64--- -target-cpu not-a-cpu -fsyntax-only %s 2>&1 | FileCheck %s --check-prefix AARCH64
// AARCH64: error: unknown target CPU 'not-a-cpu'
diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
index f58ae03a6efcf0..fc49435cdd0769 100644
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -102,7 +102,7 @@ Changes to the AMDGPU Backend
* Implemented :ref:`llvm.get.rounding <int_get_rounding>`
-* Added support for Cortex-A520, Cortex-A720 and Cortex-X4 CPUs.
+* Added support for Cortex-A520, Cortex-A720, Cortex-X4 and Cortex-M52 CPUs.
Changes to the ARM Backend
--------------------------
diff --git a/llvm/include/llvm/TargetParser/ARMTargetParser.def b/llvm/include/llvm/TargetParser/ARMTargetParser.def
index 546f6bef34a41f..558b6f127de3fd 100644
--- a/llvm/include/llvm/TargetParser/ARMTargetParser.def
+++ b/llvm/include/llvm/TargetParser/ARMTargetParser.def
@@ -308,6 +308,9 @@ ARM_CPU_NAME("cortex-m55", ARMV8_1MMainline, FK_FP_ARMV8_FULLFP16_D16, false,
ARM_CPU_NAME("cortex-m85", ARMV8_1MMainline, FK_FP_ARMV8_FULLFP16_D16, false,
(ARM::AEK_DSP | ARM::AEK_SIMD | ARM::AEK_FP | ARM::AEK_FP16 |
ARM::AEK_RAS | ARM::AEK_PACBTI))
+ARM_CPU_NAME("cortex-m52", ARMV8_1MMainline, FK_FP_ARMV8_FULLFP16_D16, false,
+ (ARM::AEK_DSP | ARM::AEK_SIMD | ARM::AEK_FP | ARM::AEK_FP16 |
+ ARM::AEK_RAS | ARM::AEK_PACBTI))
ARM_CPU_NAME("cortex-a32", ARMV8A, FK_CRYPTO_NEON_FP_ARMV8, false, ARM::AEK_CRC)
ARM_CPU_NAME("cortex-a35", ARMV8A, FK_CRYPTO_NEON_FP_ARMV8, false, ARM::AEK_CRC)
ARM_CPU_NAME("cortex-a53", ARMV8A, FK_CRYPTO_NEON_FP_ARMV8, false, ARM::AEK_CRC)
diff --git a/llvm/lib/Target/ARM/ARM.td b/llvm/lib/Target/ARM/ARM.td
index bf64ecf6496447..3df428b9ce9679 100644
--- a/llvm/lib/Target/ARM/ARM.td
+++ b/llvm/lib/Target/ARM/ARM.td
@@ -1519,6 +1519,17 @@ def : ProcessorModel<"cortex-m85", CortexM85Model, [ARMv81mMainline,
FeatureUseMISched,
HasMVEFloatOps]>;
+def : ProcessorModel<"cortex-m52", CortexM55Model, [ARMv81mMainline,
+ FeatureDSP,
+ FeatureFPARMv8_D16,
+ FeatureHasNoBranchPredictor,
+ FeaturePACBTI,
+ FeatureUseMISched,
+ FeaturePrefLoopAlign32,
+ FeatureHasSlowFPVMLx,
+ FeatureMVEVectorCostFactor1,
+ HasMVEFloatOps]>;
+
def : ProcNoItin<"cortex-a32", [ARMv8a,
FeatureHWDivThumb,
FeatureHWDivARM,
diff --git a/llvm/lib/Target/ARM/ARMSubtarget.cpp b/llvm/lib/Target/ARM/ARMSubtarget.cpp
index 1505e921405081..922fa93226f298 100644
--- a/llvm/lib/Target/ARM/ARMSubtarget.cpp
+++ b/llvm/lib/Target/ARM/ARMSubtarget.cpp
@@ -298,6 +298,7 @@ void ARMSubtarget::initSubtargetFeatures(StringRef CPU, StringRef FS) {
case CortexM3:
case CortexM7:
case CortexR52:
+ case CortexM52:
case CortexX1:
case CortexX1C:
break;
diff --git a/llvm/lib/Target/ARM/ARMSubtarget.h b/llvm/lib/Target/ARM/ARMSubtarget.h
index eb5bf25f2a3826..aa8bea103dd6ac 100644
--- a/llvm/lib/Target/ARM/ARMSubtarget.h
+++ b/llvm/lib/Target/ARM/ARMSubtarget.h
@@ -71,6 +71,7 @@ class ARMSubtarget : public ARMGenSubtargetInfo {
CortexA9,
CortexM3,
CortexM7,
+ CortexM52,
CortexR4,
CortexR4F,
CortexR5,
diff --git a/llvm/lib/TargetParser/Host.cpp b/llvm/lib/TargetParser/Host.cpp
index ae47929fce6ace..40f4ba0be5503a 100644
--- a/llvm/lib/TargetParser/Host.cpp
+++ b/llvm/lib/TargetParser/Host.cpp
@@ -202,6 +202,7 @@ StringRef sys::detail::getHostCPUNameForARM(StringRef ProcCpuinfoContent) {
.Case("0xc20", "cortex-m0")
.Case("0xc23", "cortex-m3")
.Case("0xc24", "cortex-m4")
+ .Case("0xd24", "cortex-m52")
.Case("0xd22", "cortex-m55")
.Case("0xd02", "cortex-a34")
.Case("0xd04", "cortex-a35")
diff --git a/llvm/unittests/TargetParser/TargetParserTest.cpp b/llvm/unittests/TargetParser/TargetParserTest.cpp
index abd87b455acebf..acd0b9b9d65cbd 100644
--- a/llvm/unittests/TargetParser/TargetParserTest.cpp
+++ b/llvm/unittests/TargetParser/TargetParserTest.cpp
@@ -469,13 +469,19 @@ INSTANTIATE_TEST_SUITE_P(
ARM::AEK_FP | ARM::AEK_RAS | ARM::AEK_LOB |
ARM::AEK_FP16 | ARM::AEK_PACBTI,
"8.1-M.Mainline"),
+ ARMCPUTestParams<uint64_t>("cortex-m52", "armv8.1-m.main",
+ "fp-armv8-fullfp16-d16",
+ ARM::AEK_HWDIVTHUMB | ARM::AEK_DSP | ARM::AEK_SIMD |
+ ARM::AEK_FP | ARM::AEK_RAS | ARM::AEK_LOB |
+ ARM::AEK_FP16 | ARM::AEK_PACBTI,
+ "8.1-M.Mainline"),
ARMCPUTestParams<uint64_t>("iwmmxt", "iwmmxt", "none", ARM::AEK_NONE, "iwmmxt"),
ARMCPUTestParams<uint64_t>("xscale", "xscale", "none", ARM::AEK_NONE, "xscale"),
ARMCPUTestParams<uint64_t>("swift", "armv7s", "neon-vfpv4",
ARM::AEK_HWDIVARM | ARM::AEK_HWDIVTHUMB | ARM::AEK_DSP,
"7-S")));
-static constexpr unsigned NumARMCPUArchs = 89;
+static constexpr unsigned NumARMCPUArchs = 90;
TEST(TargetParserTest, testARMCPUArchList) {
SmallVector<StringRef, NumARMCPUArchs> List;
>From 07175697b18189c68d3be085f9ec1635ecf9aa5e Mon Sep 17 00:00:00 2001
From: Jonathan Thackray <jonathan.thackray at arm.com>
Date: Fri, 8 Dec 2023 11:06:54 +0000
Subject: [PATCH 2/5] fixup! [ARM][AArch32] Add support for AArch32 Cortex-M52
CPU
---
clang/test/Misc/target-invalid-cpu-note.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/clang/test/Misc/target-invalid-cpu-note.c b/clang/test/Misc/target-invalid-cpu-note.c
index f921c4605bb976..e8c5ecbcb53634 100644
--- a/clang/test/Misc/target-invalid-cpu-note.c
+++ b/clang/test/Misc/target-invalid-cpu-note.c
@@ -1,7 +1,7 @@
// Use CHECK-NEXT instead of multiple CHECK-SAME to ensure we will fail if there is anything extra in the output.
// RUN: not %clang_cc1 -triple armv5--- -target-cpu not-a-cpu -fsyntax-only %s 2>&1 | FileCheck %s --check-prefix ARM
// ARM: error: unknown target CPU 'not-a-cpu'
-// ARM-NEXT: note: valid target CPU values are: arm8, arm810, strongarm, strongarm110, strongarm1100, strongarm1110, arm7tdmi, arm7tdmi-s, arm710t, arm720t, arm9, arm9tdmi, arm920, arm920t, arm922t, arm940t, ep9312, arm10tdmi, arm1020t, arm9e, arm946e-s, arm966e-s, arm968e-s, arm10e, arm1020e, arm1022e, arm926ej-s, arm1136j-s, arm1136jf-s, mpcore, mpcorenovfp, arm1176jz-s, arm1176jzf-s, arm1156t2-s, arm1156t2f-s, cortex-m0, cortex-m0plus, cortex-m1, sc000, cortex-a5, cortex-a7, cortex-a8, cortex-a9, cortex-a12, cortex-a15, cortex-a17, krait, cortex-r4, cortex-r4f, cortex-r5, cortex-r7, cortex-r8, cortex-r52, sc300, cortex-m3, cortex-m4, cortex-m7, cortex-m23, cortex-m33, cortex-m35p, cortex-m52, cortex-m55, cortex-m85, cortex-m52, cortex-a32, cortex-a35, cortex-a53, cortex-a55, cortex-a57, cortex-a72, cortex-a73, cortex-a75, cortex-a76, cortex-a76ae, cortex-a77, cortex-a78, cortex-a78c, cortex-a710, cortex-x1, cortex-x1c, neoverse-n1, neoverse-n2, neoverse-v1, cyclone, exynos-m3, exynos-m4, exynos-m5, kryo, iwmmxt, xscale, swift{{$}}
+// ARM-NEXT: note: valid target CPU values are: arm8, arm810, strongarm, strongarm110, strongarm1100, strongarm1110, arm7tdmi, arm7tdmi-s, arm710t, arm720t, arm9, arm9tdmi, arm920, arm920t, arm922t, arm940t, ep9312, arm10tdmi, arm1020t, arm9e, arm946e-s, arm966e-s, arm968e-s, arm10e, arm1020e, arm1022e, arm926ej-s, arm1136j-s, arm1136jf-s, mpcore, mpcorenovfp, arm1176jz-s, arm1176jzf-s, arm1156t2-s, arm1156t2f-s, cortex-m0, cortex-m0plus, cortex-m1, sc000, cortex-a5, cortex-a7, cortex-a8, cortex-a9, cortex-a12, cortex-a15, cortex-a17, krait, cortex-r4, cortex-r4f, cortex-r5, cortex-r7, cortex-r8, cortex-r52, sc300, cortex-m3, cortex-m4, cortex-m7, cortex-m23, cortex-m33, cortex-m35p, cortex-m55, cortex-m85, cortex-m52, cortex-a32, cortex-a35, cortex-a53, cortex-a55, cortex-a57, cortex-a72, cortex-a73, cortex-a75, cortex-a76, cortex-a76ae, cortex-a77, cortex-a78, cortex-a78c, cortex-a710, cortex-x1, cortex-x1c, neoverse-n1, neoverse-n2, neoverse-v1, cyclone, exynos-m3, exynos-m4, exynos-m5, kryo, iwmmxt, xscale, swift{{$}}
// RUN: not %clang_cc1 -triple arm64--- -target-cpu not-a-cpu -fsyntax-only %s 2>&1 | FileCheck %s --check-prefix AARCH64
// AARCH64: error: unknown target CPU 'not-a-cpu'
>From 5dd955e956866b36f297228e5046c995f5e19fa3 Mon Sep 17 00:00:00 2001
From: Jonathan Thackray <jonathan.thackray at arm.com>
Date: Fri, 8 Dec 2023 11:11:08 +0000
Subject: [PATCH 3/5] fixup! [ARM][AArch32] Add support for AArch32 Cortex-M52
CPU
---
llvm/docs/ReleaseNotes.rst | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
index fc49435cdd0769..fcb671cf1dfa20 100644
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -92,6 +92,8 @@ Changes to Interprocedural Optimizations
Changes to the AArch64 Backend
------------------------------
+* Added support for Cortex-A520, Cortex-A720 and Cortex-X4 CPUs.
+
Changes to the AMDGPU Backend
-----------------------------
@@ -102,11 +104,11 @@ Changes to the AMDGPU Backend
* Implemented :ref:`llvm.get.rounding <int_get_rounding>`
-* Added support for Cortex-A520, Cortex-A720, Cortex-X4 and Cortex-M52 CPUs.
-
Changes to the ARM Backend
--------------------------
+* Added support for Cortex-M52 CPUs.
+
Changes to the AVR Backend
--------------------------
>From bb83346d6f2f910fb95bb9671eb97fcc7e317ace Mon Sep 17 00:00:00 2001
From: Jonathan Thackray <jonathan.thackray at arm.com>
Date: Fri, 8 Dec 2023 12:29:44 +0000
Subject: [PATCH 4/5] fixup! [ARM][AArch32] Add support for AArch32 Cortex-M52
CPU
---
clang/docs/ReleaseNotes.rst | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 6f3b6efbfe08c0..c637e5726e436a 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -896,10 +896,13 @@ Arm and AArch64 Support
Support has been added for the following processors (-mcpu identifiers in parenthesis):
- * Arm Cortex-A520 (cortex-a520).
- * Arm Cortex-A720 (cortex-a720).
- * Arm Cortex-X4 (cortex-x4).
- * Arm Cortex-M52 (cortex-m52).
+ --target=arm
+ * Arm Cortex-M52 (cortex-m52).
+
+ --target=aarch64
+ * Arm Cortex-A520 (cortex-a520).
+ * Arm Cortex-A720 (cortex-a720).
+ * Arm Cortex-X4 (cortex-x4).
Android Support
^^^^^^^^^^^^^^^
>From b2d41d9ad382a1216bce92ce73637c7ce83c6e4d Mon Sep 17 00:00:00 2001
From: Jonathan Thackray <jonathan.thackray at arm.com>
Date: Fri, 8 Dec 2023 14:15:35 +0000
Subject: [PATCH 5/5] fixup! [ARM][AArch32] Add support for AArch32 Cortex-M52
CPU
---
clang/docs/ReleaseNotes.rst | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index c637e5726e436a..291b0c95cd6eae 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -894,15 +894,17 @@ Arm and AArch64 Support
- New AArch64 asm constraints have been added for r8-r11(Uci) and r12-r15(Ucj).
- Support has been added for the following processors (-mcpu identifiers in parenthesis):
+- Support has been added for the following processors (-mcpu identifiers in parenthesis):
- --target=arm
- * Arm Cortex-M52 (cortex-m52).
+ For Arm:
- --target=aarch64
- * Arm Cortex-A520 (cortex-a520).
- * Arm Cortex-A720 (cortex-a720).
- * Arm Cortex-X4 (cortex-x4).
+ * Cortex-M52 (cortex-m52).
+
+ For AArch64:
+
+ * Cortex-A520 (cortex-a520).
+ * Cortex-A720 (cortex-a720).
+ * Cortex-X4 (cortex-x4).
Android Support
^^^^^^^^^^^^^^^
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