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ARM64: initial backend import

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This adds a second implementation of the AArch64 architecture to LLVM,
accessible in parallel via the "arm64" triple. The plan over the
coming weeks & months is to merge the two into a single backend,
during which time thorough code review should naturally occur.

Everything will be easier with the target in-tree though, hence this
commit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205090 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tim Northover
2014-03-29 10:18:08 +00:00
parent 69bd9577fc
commit 7b837d8c75
394 changed files with 105888 additions and 32 deletions
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lib/MC/MCObjectFileInfo.cpp
+8 -1
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@@ -22,6 +22,9 @@ void MCObjectFileInfo::InitMachOMCObjectFileInfo(Triple T) {
IsFunctionEHFrameSymbolPrivate = false;
SupportsWeakOmittedEHFrame = false;
if (T.isOSDarwin() && T.getArch() == Triple::arm64)
SupportsCompactUnwindWithoutEHFrame = true;
PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel
| dwarf::DW_EH_PE_sdata4;
LSDAEncoding = FDEEncoding = FDECFIEncoding = dwarf::DW_EH_PE_pcrel;
@@ -146,7 +149,8 @@ void MCObjectFileInfo::InitMachOMCObjectFileInfo(Triple T) {
COFFDebugSymbolsSection = 0;
if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6)) {
if ((T.isMacOSX() && !T.isMacOSXVersionLT(10, 6)) ||
(T.isOSDarwin() && T.getArch() == Triple::arm64)) {
CompactUnwindSection =
Ctx->getMachOSection("__LD", "__compact_unwind",
MachO::S_ATTR_DEBUG,
@@ -154,6 +158,8 @@ void MCObjectFileInfo::InitMachOMCObjectFileInfo(Triple T) {
if (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86)
CompactUnwindDwarfEHFrameOnly = 0x04000000;
else if (T.getArch() == Triple::arm64)
CompactUnwindDwarfEHFrameOnly = 0x03000000;
}
// Debug Information.
@@ -763,6 +769,7 @@ void MCObjectFileInfo::InitMCObjectFileInfo(StringRef TT, Reloc::Model relocm,
// cellspu-apple-darwin. Perhaps we should fix in Triple?
if ((Arch == Triple::x86 || Arch == Triple::x86_64 ||
Arch == Triple::arm || Arch == Triple::thumb ||
Arch == Triple::arm64 ||
Arch == Triple::ppc || Arch == Triple::ppc64 ||
Arch == Triple::UnknownArch) &&
(T.isOSDarwin() || T.isOSBinFormatMachO())) {