1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMBaseRegisterInfo.cpp b/lib/Target/ARM/ARMBaseRegisterInfo.cpp
index 2adcd2cdff..9dc51b810e 100644
--- a/lib/Target/ARM/ARMBaseRegisterInfo.cpp
+++ b/lib/Target/ARM/ARMBaseRegisterInfo.cpp
@@ -100,6 +100,12 @@ getReservedRegs(const MachineFunction &MF) const {
   // Some targets reserve R9.
   if (STI.isR9Reserved())
     Reserved.set(ARM::R9);
+  // Reserve D16-D31 if the subtarget doesn't support them.
+  if (!STI.hasVFP3() || STI.hasD16()) {
+    assert(ARM::D31 == ARM::D16 + 15);
+    for (unsigned i = 0; i != 16; ++i)
+      Reserved.set(ARM::D16 + i);
+  }
   return Reserved;
 }