[llvm-commits] [llvm] r116714 - /llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp

[Jim Grosbach]

Author: grosbach
Date: Mon Oct 18 11:48:59 2010
New Revision: 116714

URL: http://llvm.org/viewvc/llvm-project?rev=116714&view=rev
Log:
ARM addrmode4 instructions (ldm, stm and friends) can't encode an immediate
offset for stack references. Make sure we take that into account when
deciding whether to reserver an emergency spill slot for the register
scavenger. rdar://8559625

Modified:
    llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp

Modified: llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp?rev=116714&r1=116713&r2=116714&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp Mon Oct 18 11:48:59 2010
@@ -661,8 +661,9 @@
           if (hasFP(MF) && AFI->hasStackFrame())
             Limit = std::min(Limit, (1U << 8) - 1);
           break;
+        case ARMII::AddrMode4:
         case ARMII::AddrMode6:
-          // Addressing mode 6 (load/store) instructions can't encode an
+          // Addressing modes 4 & 6 (load/store) instructions can't encode an
           // immediate offset for stack references.
           return 0;
         default: