diff options
| author | Tim Northover <tnorthover@apple.com> | 2015-10-28 22:56:36 +0000 |
|---|---|---|
| committer | Tim Northover <tnorthover@apple.com> | 2015-10-28 22:56:36 +0000 |
| commit | f8e47e4868270ee1bea61a5b64f3df5153262a08 (patch) | |
| tree | adb4e7c6c66481f3cd0c2d4ee0d01aec0fef532a /llvm/lib/Target/ARM/ARMSubtarget.cpp | |
| parent | 2253d1c0525d2a30c0a9e6e26237dabc6237b9b4 (diff) | |
| download | llvm-f8e47e4868270ee1bea61a5b64f3df5153262a08.zip llvm-f8e47e4868270ee1bea61a5b64f3df5153262a08.tar.gz llvm-f8e47e4868270ee1bea61a5b64f3df5153262a08.tar.bz2 | |
ARM: add support for WatchOS's compact unwind information.
llvm-svn: 251573
Diffstat (limited to 'llvm/lib/Target/ARM/ARMSubtarget.cpp')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMSubtarget.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/llvm/lib/Target/ARM/ARMSubtarget.cpp b/llvm/lib/Target/ARM/ARMSubtarget.cpp index 84d3ebc..50eb378 100644 --- a/llvm/lib/Target/ARM/ARMSubtarget.cpp +++ b/llvm/lib/Target/ARM/ARMSubtarget.cpp @@ -151,6 +151,8 @@ void ARMSubtarget::initializeEnvironment() { UseNaClTrap = false; GenLongCalls = false; UnsafeFPMath = false; + UseSjLjEH = (isTargetDarwin() && + TargetTriple.getSubArch() != Triple::ARMSubArch_v7k); } void ARMSubtarget::initSubtargetFeatures(StringRef CPU, StringRef FS) { @@ -324,7 +326,10 @@ bool ARMSubtarget::enableAtomicExpand() const { } bool ARMSubtarget::useStride4VFPs(const MachineFunction &MF) const { - return isSwift() && !MF.getFunction()->optForMinSize(); + // For general targets, the prologue can grow when VFPs are allocated with + // stride 4 (more vpush instructions). But WatchOS uses a compact unwind + // format which it's more important to get right. + return isTargetWatchOS() || (isSwift() && !MF.getFunction()->optForMinSize()); } bool ARMSubtarget::useMovt(const MachineFunction &MF) const { |