tree df4f4c8effb52f7abc5ea69393a45bf20ef3241e
parent 3cbf9029b819ffeb998ebddbbafede761ccfbc3f
author Bill Schmidt <wschmidt@linux.vnet.ibm.com> 1374802543 +0000
committer Copybara-Service <copybara-worker@google.com> 1601377905 -0700

[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
GitOrigin-RevId: 0a9170d931629a1a8d5aced1ff9c0a46976c62dc