Introduce helpers to compute the 32-bit varaints and 64-bit variants of

some architectures. These are useful for interacting with multiarch or
bi-arch GCC (or GCC-based) toolchains.

llvm-svn: 149895

1 files changed, 74 insertions, 0 deletions

diff --git a/llvm/lib/Support/Triple.cpp b/llvm/lib/Support/Triple.cpp
index 7433c0ae86c..7c4da12bfe7 100644
--- a/llvm/lib/Support/Triple.cpp
+++ b/llvm/lib/Support/Triple.cpp
@@ -753,3 +753,77 @@ bool Triple::isArch32Bit() const {
 bool Triple::isArch16Bit() const {
   return getArchPointerBitWidth(getArch()) == 16;
 }
+
+Triple Triple::get32BitArchVariant() const {
+  Triple T(*this);
+  switch (getArch()) {
+  case Triple::UnknownArch:
+  case Triple::InvalidArch:
+  case Triple::msp430:
+    T.setArch(UnknownArch);
+    break;
+
+  case Triple::amdil:
+  case Triple::arm:
+  case Triple::cellspu:
+  case Triple::hexagon:
+  case Triple::le32:
+  case Triple::mblaze:
+  case Triple::mips:
+  case Triple::mipsel:
+  case Triple::ppc:
+  case Triple::ptx32:
+  case Triple::sparc:
+  case Triple::tce:
+  case Triple::thumb:
+  case Triple::x86:
+  case Triple::xcore:
+    // Already 32-bit.
+    break;
+
+  case Triple::mips64:    T.setArch(Triple::mips);    break;
+  case Triple::mips64el:  T.setArch(Triple::mipsel);  break;
+  case Triple::ppc64:     T.setArch(Triple::ppc);   break;
+  case Triple::ptx64:     T.setArch(Triple::ptx32);   break;
+  case Triple::sparcv9:   T.setArch(Triple::sparc);   break;
+  case Triple::x86_64:    T.setArch(Triple::x86);     break;
+  }
+  return T;
+}
+
+Triple Triple::get64BitArchVariant() const {
+  Triple T(*this);
+  switch (getArch()) {
+  case Triple::InvalidArch:
+  case Triple::UnknownArch:
+  case Triple::amdil:
+  case Triple::arm:
+  case Triple::cellspu:
+  case Triple::hexagon:
+  case Triple::le32:
+  case Triple::mblaze:
+  case Triple::msp430:
+  case Triple::tce:
+  case Triple::thumb:
+  case Triple::xcore:
+    T.setArch(UnknownArch);
+    break;
+
+  case Triple::mips64:
+  case Triple::mips64el:
+  case Triple::ppc64:
+  case Triple::ptx64:
+  case Triple::sparcv9:
+  case Triple::x86_64:
+    // Already 64-bit.
+    break;
+
+  case Triple::mips:    T.setArch(Triple::mips64);    break;
+  case Triple::mipsel:  T.setArch(Triple::mips64el);  break;
+  case Triple::ppc:     T.setArch(Triple::ppc64);     break;
+  case Triple::ptx32:   T.setArch(Triple::ptx64);     break;
+  case Triple::sparc:   T.setArch(Triple::sparcv9);   break;
+  case Triple::x86:     T.setArch(Triple::x86_64);    break;
+  }
+  return T;
+}