[llvm-commits] [llvm] r48217 - /llvm/trunk/lib/Target/X86/X86RegisterInfo.td
Evan Cheng
evan.cheng at apple.com
Tue Mar 11 00:16:00 PDT 2008
Author: evancheng
Date: Tue Mar 11 02:16:00 2008
New Revision: 48217
URL: http://llvm.org/viewvc/llvm-project?rev=48217&view=rev
Log:
In 32-bit mode, mark 64-bit GPR's as unallocatable.
Modified:
llvm/trunk/lib/Target/X86/X86RegisterInfo.td
Modified: llvm/trunk/lib/Target/X86/X86RegisterInfo.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86RegisterInfo.td?rev=48217&r1=48216&r2=48217&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86RegisterInfo.td (original)
+++ llvm/trunk/lib/Target/X86/X86RegisterInfo.td Tue Mar 11 02:16:00 2008
@@ -415,6 +415,9 @@
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
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