R600: Don't compare iterators of different maps.

Found be libstdc's debug mode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183549 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/R600/AMDGPUIndirectAddressing.cpp b/lib/Target/R600/AMDGPUIndirectAddressing.cpp
index ed6c8ec..14b9e4f 100644
--- a/lib/Target/R600/AMDGPUIndirectAddressing.cpp
+++ b/lib/Target/R600/AMDGPUIndirectAddressing.cpp
@@ -224,7 +224,7 @@
             unsigned LiveAddress = RegisterAddressMap[Reg];
             // Chain the live-ins
             if (LiveAddressRegisterMap.find(LiveAddress) !=
-                                                     RegisterAddressMap.end()) {
+                LiveAddressRegisterMap.end()) {
               MI.addOperand(MachineOperand::CreateReg(
                                   LiveAddressRegisterMap[LiveAddress],
                                   false, // isDef