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[ARM] Add -mfpu=none option to the driver. 

llvm-svn: 191736
This commit is contained in:
Amara Emerson 2013-10-01 10:20:54 +00:00
parent 28942d4ca0
commit 4cdb87b2d5
2 changed files with 48 additions and 4 deletions
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43
clang/lib/Driver/Tools.cpp
View File

@ -573,8 +573,36 @@ static bool isNoCommonDefault(const llvm::Triple &Triple) {
//
// FIXME: Centralize feature selection, defaulting shouldn't be also in the
// frontend target.
static void getFPUFeatures(const Driver &D, const Arg *A, const ArgList &Args,
std::vector<const char *> &Features) {
static void getAArch64FPUFeatures(const Driver &D, const Arg *A,
const ArgList &Args,
std::vector<const char *> &Features) {
StringRef FPU = A->getValue();
if (FPU == "fp-armv8") {
Features.push_back("+fp-armv8");
} else if (FPU == "neon-fp-armv8") {
Features.push_back("+fp-armv8");
Features.push_back("+neon");
} else if (FPU == "crypto-neon-fp-armv8") {
Features.push_back("+fp-armv8");
Features.push_back("+neon");
Features.push_back("+crypto");
} else if (FPU == "neon") {
Features.push_back("+neon");
} else if (FPU == "none") {
Features.push_back("-fp-armv8");
Features.push_back("-crypto");
Features.push_back("-neon");
} else
D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args);
}
// Handle -mfpu=.
//
// FIXME: Centralize feature selection, defaulting shouldn't be also in the
// frontend target.
static void getARMFPUFeatures(const Driver &D, const Arg *A,
const ArgList &Args,
std::vector<const char *> &Features) {
StringRef FPU = A->getValue();
// Set the target features based on the FPU.
@ -603,6 +631,13 @@ static void getFPUFeatures(const Driver &D, const Arg *A, const ArgList &Args,
Features.push_back("+fp-armv8");
} else if (FPU == "neon") {
Features.push_back("+neon");
} else if (FPU == "none") {
Features.push_back("-vfp2");
Features.push_back("-vfp3");
Features.push_back("-vfp4");
Features.push_back("-fp-armv8");
Features.push_back("-crypto");
Features.push_back("-neon");
} else
D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args);
}
@ -704,7 +739,7 @@ static void getARMTargetFeatures(const Driver &D, const llvm::Triple &Triple,
// Honor -mfpu=.
if (const Arg *A = Args.getLastArg(options::OPT_mfpu_EQ))
getFPUFeatures(D, A, Args, Features);
getARMFPUFeatures(D, A, Args, Features);
// Setting -msoft-float effectively disables NEON because of the GCC
// implementation, although the same isn't true of VFP or VFP3.
@ -1384,7 +1419,7 @@ static void getAArch64TargetFeatures(const Driver &D, const ArgList &Args,
std::vector<const char *> &Features) {
// Honor -mfpu=.
if (const Arg *A = Args.getLastArg(options::OPT_mfpu_EQ))
getFPUFeatures(D, A, Args, Features);
getAArch64FPUFeatures(D, A, Args, Features);
}
static void getTargetFeatures(const Driver &D, const llvm::Triple &Triple,

9
clang/test/Driver/arm-mfpu.c
View File

@ -61,6 +61,15 @@
// CHECK-CRYPTO-NEON-FP-ARMV8: "-target-feature" "+crypto"
// CHECK-CRYPTO-NEON-FP-ARMV8: "-target-feature" "+fp-armv8"
// RUN: %clang -target armv8-linux-gnueabi -mfpu=none %s -### 2>&1 \
// RUN: | FileCheck --check-prefix=CHECK-NO-FP %s
// CHECK-NO-FP: "-target-feature" "-vfp2"
// CHECK-NO-FP: "-target-feature" "-vfp3"
// CHECK-NO-FP: "-target-feature" "-vfp4"
// CHECK-NO-FP: "-target-feature" "-fp-armv8"
// CHECK-NO-FP: "-target-feature" "-crypto"
// CHECK-NO-FP: "-target-feature" "-neon"
// RUN: %clang -target arm-linux-gnueabihf %s -### 2>&1 \
// RUN: | FileCheck --check-prefix=CHECK-HF %s
// CHECK-HF: "-target-cpu" "arm1136jf-s"