[PowerPC] Support powerpc64le as a syntax-checking target.

This patch provides basic support for powerpc64le as an LLVM target.
However, use of this target will not actually generate little-endian
code.  Instead, use of the target will cause the correct little-endian
built-in defines to be generated, so that code that tests for
__LITTLE_ENDIAN__, for example, will be correctly parsed for
syntax-only testing.  Code generation will otherwise be the same as
powerpc64 (big-endian), for now.

The patch leaves open the possibility of creating a little-endian
PowerPC64 back end, but there is no immediate intent to create such a
thing.

The LLVM portions of this patch simply add ppc64le coverage everywhere
that ppc64 coverage currently exists.  There is nothing of any import
worth testing until such time as little-endian code generation is
implemented.  In the corresponding Clang patch, there is a new test
case variant to ensure that correct built-in defines for little-endian
code are generated.

llvm-svn: 187179

1 files changed, 3 insertions, 2 deletions

diff --git a/llvm/lib/MC/MCObjectFileInfo.cpp b/llvm/lib/MC/MCObjectFileInfo.cpp
index 96b62f19d93..bcf52d2368a 100644
--- a/llvm/lib/MC/MCObjectFileInfo.cpp
+++ b/llvm/lib/MC/MCObjectFileInfo.cpp
@@ -79,7 +79,8 @@ void MCObjectFileInfo::InitMachOMCObjectFileInfo(Triple T) {
   // to using it in -static mode.
   SixteenByteConstantSection = 0;
   if (RelocM != Reloc::Static &&
-      T.getArch() != Triple::x86_64 && T.getArch() != Triple::ppc64)
+      T.getArch() != Triple::x86_64 && T.getArch() != Triple::ppc64 &&
+      T.getArch() != Triple::ppc64le)
     SixteenByteConstantSection =   // .literal16
       Ctx->getMachOSection("__TEXT", "__literal16",
                            MCSectionMachO::S_16BYTE_LITERALS,
@@ -288,7 +289,7 @@ void MCObjectFileInfo::InitELFMCObjectFileInfo(Triple T) {
       FDEEncoding = dwarf::DW_EH_PE_udata4;
       TTypeEncoding = dwarf::DW_EH_PE_absptr;
     }
-  } else if (T.getArch() == Triple::ppc64) {
+  } else if (T.getArch() == Triple::ppc64 || T.getArch() == Triple::ppc64le) {
     PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
       dwarf::DW_EH_PE_udata8;
     LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;