From 726ce7fc571a511f628736ba94ee113334ee3e60 Mon Sep 17 00:00:00 2001
From: Gabor Ballabas <gaborb@inf.u-szeged.hu>
Date: Fri, 12 Jun 2015 17:33:37 +0000
Subject: [PATCH] Allow case-insensitive values for -mcpu for AArch64 target in
 line with GCC.

GCC allows case-insensitive values for -mcpu, -march and -mtune options.
This patch implements the same behaviour for the -mcpu option for the AArch64 target.

llvm-svn: 239619
---
 clang/lib/Driver/Tools.cpp                        |  8 +++++---
 clang/test/Driver/aarch64-cpus.c                  | 12 ++++++++++++
 clang/test/Preprocessor/aarch64-target-features.c |  6 ++++++
 3 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index fb277d420453..a2f3c196d9c4 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -850,7 +850,7 @@ static std::string getAArch64TargetCPU(const ArgList &Args) {
     CPU = A->getValue();
   } else if ((A = Args.getLastArg(options::OPT_mcpu_EQ))) {
     StringRef Mcpu = A->getValue();
-    CPU = Mcpu.split("+").first;
+    CPU = Mcpu.split("+").first.lower();
   }
 
   // Handle CPU name is 'native'.
@@ -1893,7 +1893,8 @@ getAArch64ArchFeaturesFromMcpu(const Driver &D, StringRef Mcpu,
                                const ArgList &Args,
                                std::vector<const char *> &Features) {
   StringRef CPU;
-  if (!DecodeAArch64Mcpu(D, Mcpu, CPU, Features))
+  std::string McpuLowerCase = Mcpu.lower();
+  if (!DecodeAArch64Mcpu(D, McpuLowerCase, CPU, Features))
     return false;
 
   return true;
@@ -1919,7 +1920,8 @@ getAArch64MicroArchFeaturesFromMcpu(const Driver &D, StringRef Mcpu,
                                     std::vector<const char *> &Features) {
   StringRef CPU;
   std::vector<const char *> DecodedFeature;
-  if (!DecodeAArch64Mcpu(D, Mcpu, CPU, DecodedFeature))
+  std::string McpuLowerCase = Mcpu.lower();
+  if (!DecodeAArch64Mcpu(D, McpuLowerCase, CPU, DecodedFeature))
     return false;
 
   return getAArch64MicroArchFeaturesFromMtune(D, CPU, Args, Features);
diff --git a/clang/test/Driver/aarch64-cpus.c b/clang/test/Driver/aarch64-cpus.c
index 43e3ccd45937..fcefdefcb7f3 100644
--- a/clang/test/Driver/aarch64-cpus.c
+++ b/clang/test/Driver/aarch64-cpus.c
@@ -111,3 +111,15 @@
 // RUN: %clang -target aarch64_be -mbig-endian -march=armv8.1-a -### -c %s 2>&1 | FileCheck -check-prefix=GENERICV81A-BE %s
 // GENERICV81A-BE: "-cc1"{{.*}} "-triple" "aarch64_be{{.*}}" "-target-cpu" "generic" "-target-feature" "+neon" "-target-feature" "+v8.1a"
 
+// ================== Check whether -mcpu accepts mixed-case values.
+// RUN: %clang -target aarch64 -mcpu=Cortex-a53 -### -c %s 2>&1 | FileCheck -check-prefix=CASE-INSENSITIVE-CA53 %s
+// CASE-INSENSITIVE-CA53: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-cpu" "cortex-a53"
+
+// RUN: %clang -target arm64 -mcpu=cortex-A53 -### -c %s 2>&1 | FileCheck -check-prefix=CASE-INSENSITIVE-ARM64-CA53 %s
+// CASE-INSENSITIVE-ARM64-CA53: "-cc1"{{.*}} "-triple" "arm64{{.*}}" "-target-cpu" "cortex-a53"
+
+// RUN: %clang -target aarch64 -mcpu=CORTEX-A57 -### -c %s 2>&1 | FileCheck -check-prefix=CASE-INSENSITIVE-CA57 %s
+// CASE-INSENSITIVE-CA57: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-cpu" "cortex-a57"
+
+// RUN: %clang -target arm64 -mcpu=Cortex-A57 -### -c %s 2>&1 | FileCheck -check-prefix=CASE-INSENSITIVE-ARM64-CA57 %s
+// CASE-INSENSITIVE-ARM64-CA57: "-cc1"{{.*}} "-triple" "arm64{{.*}}" "-target-cpu" "cortex-a57"
diff --git a/clang/test/Preprocessor/aarch64-target-features.c b/clang/test/Preprocessor/aarch64-target-features.c
index 85c0f246840b..a55b1517058c 100644
--- a/clang/test/Preprocessor/aarch64-target-features.c
+++ b/clang/test/Preprocessor/aarch64-target-features.c
@@ -92,6 +92,12 @@
 // RUN: %clang -target aarch64 -mcpu=generic+crc -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-MCPU-2 %s
 // RUN: %clang -target aarch64 -mcpu=generic+nocrc+crc -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-MCPU-2 %s
 // RUN: %clang -target aarch64 -mcpu=cortex-a53+nosimd -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-MCPU-3 %s
+// ================== Check whether -mcpu accepts mixed-case features.
+// RUN: %clang -target aarch64 -mcpu=cyclone+NOCRYPTO -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-MCPU-1 %s
+// RUN: %clang -target aarch64 -mcpu=cyclone+CRYPTO+nocrypto -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-MCPU-1 %s
+// RUN: %clang -target aarch64 -mcpu=generic+Crc -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-MCPU-2 %s
+// RUN: %clang -target aarch64 -mcpu=GENERIC+nocrc+CRC -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-MCPU-2 %s
+// RUN: %clang -target aarch64 -mcpu=cortex-a53+noSIMD -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-MCPU-3 %s
 // CHECK-MCPU-1: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-feature" "+neon" "-target-feature" "+crc" "-target-feature" "-crypto" "-target-feature" "+zcm" "-target-feature" "+zcz"
 // CHECK-MCPU-2: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-feature" "+neon" "-target-feature" "+crc"
 // CHECK-MCPU-3: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-feature" "-neon"