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AArch64: support arm64_32, an ILP32 slice for watchOS.

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This is the main CodeGen patch to support the arm64_32 watchOS ABI in LLVM.
FastISel is mostly disabled for now since it would generate incorrect code for
ILP32.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@371722 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tim Northover
2019-09-12 10:22:23 +00:00
parent 03dc1837d3
commit a8e37d1bbb
63 changed files with 2224 additions and 242 deletions
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lib/MC/MCObjectFileInfo.cpp
+4 -3
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@@ -28,7 +28,7 @@ static bool useCompactUnwind(const Triple &T) {
return false;
// aarch64 always has it.
if (T.getArch() == Triple::aarch64)
if (T.getArch() == Triple::aarch64 || T.getArch() == Triple::aarch64_32)
return true;
// armv7k always has it.
@@ -57,7 +57,8 @@ void MCObjectFileInfo::initMachOMCObjectFileInfo(const Triple &T) {
MachO::S_ATTR_STRIP_STATIC_SYMS | MachO::S_ATTR_LIVE_SUPPORT,
SectionKind::getReadOnly());
if (T.isOSDarwin() && T.getArch() == Triple::aarch64)
if (T.isOSDarwin() &&
(T.getArch() == Triple::aarch64 || T.getArch() == Triple::aarch64_32))
SupportsCompactUnwindWithoutEHFrame = true;
if (T.isWatchABI())
@@ -193,7 +194,7 @@ void MCObjectFileInfo::initMachOMCObjectFileInfo(const Triple &T) {
if (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86)
CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_X86_64_MODE_DWARF
else if (T.getArch() == Triple::aarch64)
else if (T.getArch() == Triple::aarch64 || T.getArch() == Triple::aarch64_32)
CompactUnwindDwarfEHFrameOnly = 0x03000000; // UNWIND_ARM64_MODE_DWARF
else if (T.getArch() == Triple::arm || T.getArch() == Triple::thumb)
CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_ARM_MODE_DWARF