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[Triple] Add a helper to switch between big/little endian variants

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This will be used from clang's driver.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241527 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2015-07-06 23:58:14 +00:00
parent 34be8041b3
commit 32f3dc455b
3 changed files with 210 additions and 0 deletions
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16
include/llvm/ADT/Triple.h
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@ -569,6 +569,22 @@ public:
/// architecture if no such variant can be found.
llvm::Triple get64BitArchVariant() const;
/// Form a triple with a big endian variant of the current architecture.
///
/// This can be used to move across "families" of architectures where useful.
///
/// \returns A new triple with a big endian architecture or an unknown
/// architecture if no such variant can be found.
llvm::Triple getBigEndianArchVariant() const;
/// Form a triple with a little endian variant of the current architecture.
///
/// This can be used to move across "families" of architectures where useful.
///
/// \returns A new triple with a little endian architecture or an unknown
/// architecture if no such variant can be found.
llvm::Triple getLittleEndianArchVariant() const;
/// Get the (LLVM) name of the minimum ARM CPU for the arch we are targeting.
///
/// \param Arch the architecture name (e.g., "armv7s"). If it is an empty

116
lib/Support/Triple.cpp
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@ -1165,6 +1165,122 @@ Triple Triple::get64BitArchVariant() const {
return T;
}
Triple Triple::getBigEndianArchVariant() const {
Triple T(*this);
switch (getArch()) {
case Triple::UnknownArch:
case Triple::amdgcn:
case Triple::amdil64:
case Triple::amdil:
case Triple::hexagon:
case Triple::hsail64:
case Triple::hsail:
case Triple::kalimba:
case Triple::le32:
case Triple::le64:
case Triple::msp430:
case Triple::nvptx64:
case Triple::nvptx:
case Triple::r600:
case Triple::shave:
case Triple::spir64:
case Triple::spir:
case Triple::wasm32:
case Triple::wasm64:
case Triple::x86:
case Triple::x86_64:
case Triple::xcore:
// ARM is intentionally unsupported here, changing the architecture would
// drop any arch suffixes.
case Triple::arm:
case Triple::thumb:
T.setArch(UnknownArch);
break;
case Triple::aarch64_be:
case Triple::armeb:
case Triple::bpfeb:
case Triple::mips64:
case Triple::mips:
case Triple::ppc64:
case Triple::ppc:
case Triple::sparc:
case Triple::sparcv9:
case Triple::systemz:
case Triple::tce:
case Triple::thumbeb:
// Already big endian.
break;
case Triple::aarch64: T.setArch(Triple::aarch64_be); break;
case Triple::bpfel: T.setArch(Triple::bpfeb); break;
case Triple::mips64el:T.setArch(Triple::mips64); break;
case Triple::mipsel: T.setArch(Triple::mips); break;
case Triple::ppc64le: T.setArch(Triple::ppc64); break;
case Triple::sparcel: T.setArch(Triple::sparc); break;
}
return T;
}
Triple Triple::getLittleEndianArchVariant() const {
Triple T(*this);
switch (getArch()) {
case Triple::UnknownArch:
case Triple::ppc:
case Triple::sparcv9:
case Triple::systemz:
case Triple::tce:
// ARM is intentionally unsupported here, changing the architecture would
// drop any arch suffixes.
case Triple::armeb:
case Triple::thumbeb:
T.setArch(UnknownArch);
break;
case Triple::aarch64:
case Triple::amdgcn:
case Triple::amdil64:
case Triple::amdil:
case Triple::arm:
case Triple::bpfel:
case Triple::hexagon:
case Triple::hsail64:
case Triple::hsail:
case Triple::kalimba:
case Triple::le32:
case Triple::le64:
case Triple::mips64el:
case Triple::mipsel:
case Triple::msp430:
case Triple::nvptx64:
case Triple::nvptx:
case Triple::ppc64le:
case Triple::r600:
case Triple::shave:
case Triple::sparcel:
case Triple::spir64:
case Triple::spir:
case Triple::thumb:
case Triple::wasm32:
case Triple::wasm64:
case Triple::x86:
case Triple::x86_64:
case Triple::xcore:
// Already little endian.
break;
case Triple::aarch64_be: T.setArch(Triple::aarch64); break;
case Triple::bpfeb: T.setArch(Triple::bpfel); break;
case Triple::mips64: T.setArch(Triple::mips64el); break;
case Triple::mips: T.setArch(Triple::mipsel); break;
case Triple::ppc64: T.setArch(Triple::ppc64le); break;
case Triple::sparc: T.setArch(Triple::sparcel); break;
}
return T;
}
const char *Triple::getARMCPUForArch(StringRef MArch) const {
if (MArch.empty())
MArch = getArchName();

78
unittests/ADT/TripleTest.cpp
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@ -553,6 +553,84 @@ TEST(TripleTest, BitWidthArchVariants) {
EXPECT_EQ(Triple::wasm64, T.get64BitArchVariant().getArch());
}
TEST(TripleTest, EndianArchVariants) {
Triple T;
EXPECT_EQ(Triple::UnknownArch, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::UnknownArch, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::UnknownArch);
EXPECT_EQ(Triple::UnknownArch, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::UnknownArch, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::aarch64_be);
EXPECT_EQ(Triple::aarch64_be, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::aarch64, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::aarch64);
EXPECT_EQ(Triple::aarch64_be, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::aarch64, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::armeb);
EXPECT_EQ(Triple::armeb, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::UnknownArch, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::arm);
EXPECT_EQ(Triple::UnknownArch, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::arm, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::bpfeb);
EXPECT_EQ(Triple::bpfeb, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::bpfel, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::bpfel);
EXPECT_EQ(Triple::bpfeb, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::bpfel, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::mips64);
EXPECT_EQ(Triple::mips64, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::mips64el, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::mips64el);
EXPECT_EQ(Triple::mips64, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::mips64el, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::mips);
EXPECT_EQ(Triple::mips, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::mipsel, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::mipsel);
EXPECT_EQ(Triple::mips, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::mipsel, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::ppc);
EXPECT_EQ(Triple::ppc, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::UnknownArch, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::ppc64);
EXPECT_EQ(Triple::ppc64, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::ppc64le, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::ppc64le);
EXPECT_EQ(Triple::ppc64, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::ppc64le, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::sparc);
EXPECT_EQ(Triple::sparc, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::sparcel, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::sparcel);
EXPECT_EQ(Triple::sparc, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::sparcel, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::thumb);
EXPECT_EQ(Triple::UnknownArch, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::thumb, T.getLittleEndianArchVariant().getArch());
T.setArch(Triple::thumbeb);
EXPECT_EQ(Triple::thumbeb, T.getBigEndianArchVariant().getArch());
EXPECT_EQ(Triple::UnknownArch, T.getLittleEndianArchVariant().getArch());
}
TEST(TripleTest, getOSVersion) {
Triple T;
unsigned Major, Minor, Micro;