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

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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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187179 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Schmidt
2013-07-26 01:35:43 +00:00
parent fb5b3eaacb
commit f38cc38fa6
22 changed files with 73 additions and 17 deletions
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5
lib/MC/MCObjectFileInfo.cpp
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@@ -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;