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Allow case-insensitive values for -march for ARM in line with GCC. 

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

llvm-svn: 239527
This commit is contained in:
Gabor Ballabas 2015-06-11 12:29:56 +00:00
parent 647e61244b
commit cebcb3b52f
3 changed files with 18 additions and 8 deletions
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13
clang/lib/Driver/Tools.cpp
View File

@ -679,7 +679,7 @@ static void getARMTargetFeatures(const Driver &D, const llvm::Triple &Triple,
// getARMArch is used here instead of just checking the -march value in order
// to handle -march=native correctly.
if (const Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
StringRef Arch = arm::getARMArch(Args, Triple);
std::string Arch = arm::getARMArch(Args, Triple);
if (llvm::ARMTargetParser::parseArch(Arch) == llvm::ARM::AK_INVALID)
D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args);
}
@ -689,7 +689,7 @@ static void getARMTargetFeatures(const Driver &D, const llvm::Triple &Triple,
// getLLVMArchSuffixForARM which also needs an architecture.
if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
std::string CPU = arm::getARMTargetCPU(Args, Triple);
StringRef Arch = arm::getARMArch(Args, Triple);
std::string Arch = arm::getARMArch(Args, Triple);
if (strcmp(arm::getLLVMArchSuffixForARM(CPU, Arch), "") == 0)
D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args);
}
@ -5631,9 +5631,9 @@ void hexagon::Link::ConstructJob(Compilation &C, const JobAction &JA,
}
// Hexagon tools end.
const StringRef arm::getARMArch(const ArgList &Args,
const llvm::Triple &Triple) {
StringRef MArch;
const std::string arm::getARMArch(const ArgList &Args,
const llvm::Triple &Triple) {
std::string MArch;
if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
// Otherwise, if we have -march= choose the base CPU for that arch.
MArch = A->getValue();
@ -5641,6 +5641,7 @@ const StringRef arm::getARMArch(const ArgList &Args,
// Otherwise, use the Arch from the triple.
MArch = Triple.getArchName();
}
MArch = StringRef(MArch).lower();
// Handle -march=native.
if (MArch == "native") {
@ -5662,7 +5663,7 @@ const StringRef arm::getARMArch(const ArgList &Args,
/// Get the (LLVM) name of the minimum ARM CPU for the arch we are targeting.
const char *arm::getARMCPUForMArch(const ArgList &Args,
const llvm::Triple &Triple) {
StringRef MArch = getARMArch(Args, Triple);
std::string MArch = getARMArch(Args, Triple);
// getARMCPUForArch defaults to the triple if MArch is empty, but empty MArch
// here means an -march=native that we can't handle, so instead return no CPU.
if (MArch.empty())

4
clang/lib/Driver/Tools.h
View File

@ -227,8 +227,8 @@ namespace hexagon {
namespace arm {
std::string getARMTargetCPU(const llvm::opt::ArgList &Args,
const llvm::Triple &Triple);
const StringRef getARMArch(const llvm::opt::ArgList &Args,
const llvm::Triple &Triple);
const std::string getARMArch(const llvm::opt::ArgList &Args,
const llvm::Triple &Triple);
const char* getARMCPUForMArch(const llvm::opt::ArgList &Args,
const llvm::Triple &Triple);
const char* getLLVMArchSuffixForARM(StringRef CPU, StringRef Arch);

9
clang/test/Driver/arm-cortex-cpus.c
View File

@ -402,3 +402,12 @@
// RUN: %clang -target arm-linux-gnueabi -mcpu=CorteX-a15 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CASE-INSENSITIVE-CPUV7A %s
// RUN: %clang -target arm-linux-gnueabi -mcpu=CorteX-A17 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CASE-INSENSITIVE-CPUV7A %s
// CHECK-CASE-INSENSITIVE-CPUV7A: "-cc1"{{.*}} "-triple" "armv7-{{.*}}
// ================== Check whether -march accepts mixed-case values.
// RUN: %clang -target arm -march=Armv5 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CASE-INSENSITIVE-V5 %s
// RUN: %clang -target arm -march=ARMV5 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CASE-INSENSITIVE-V5 %s
// CHECK-CASE-INSENSITIVE-V5: "-cc1"{{.*}} "-triple" "armv5-{{.*}} "-target-cpu" "arm10tdmi"
// RUN: %clang -target arm -march=Armv6t2 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CASE-INSENSITIVE-V6T2-THUMB %s
// RUN: %clang -target arm -march=ARMV6T2 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CASE-INSENSITIVE-V6T2-THUMB %s
// CHECK-CASE-INSENSITIVE-V6T2-THUMB: "-cc1"{{.*}} "-triple" "thumbv6t2-{{.*}} "-target-cpu" "arm1156t2-s"