ARM64: initial backend import
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.
llvm-svn: 205090
diff --git a/llvm/lib/MC/MCObjectFileInfo.cpp b/llvm/lib/MC/MCObjectFileInfo.cpp
index e808d0c..3b011c8 100644
--- a/llvm/lib/MC/MCObjectFileInfo.cpp
+++ b/llvm/lib/MC/MCObjectFileInfo.cpp
@@ -22,6 +22,9 @@
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 @@
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 @@
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 @@
// 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())) {