diff options
Diffstat (limited to 'lib/Target')
| -rw-r--r-- | lib/Target/X86/X86RegisterInfo.td | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Target/X86/X86RegisterInfo.td b/lib/Target/X86/X86RegisterInfo.td index 93d2a51..2440238 100644 --- a/lib/Target/X86/X86RegisterInfo.td +++ b/lib/Target/X86/X86RegisterInfo.td @@ -415,6 +415,9 @@ def GR64 : RegisterClass<"X86", [i64], 64, GR64Class::allocation_order_end(const MachineFunction &MF) const { const TargetMachine &TM = MF.getTarget(); const TargetRegisterInfo *RI = TM.getRegisterInfo(); + const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>(); + if (!Subtarget.is64Bit()) + return begin(); // None of these are allocatable in 32-bit. if (RI->hasFP(MF)) // Does the function dedicate RBP to being a frame ptr? return end()-2; // If so, don't allocate RSP or RBP else |