Lots of build failures, like:

/pool/buildbot/slaves/sobornost/jdkX/build/src/hotspot/cpu/arm/c1_LIRGenerator_arm.cpp:378:14: error: prototype for 'LIR_Address* LIRGenerator::emit_array_address(LIR_Opr, LIR_Opr, BasicType, bool)' does not match any in class 'LIRGenerator'
 LIR_Address* LIRGenerator::emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr,
              ^~~~~~~~~~~~
In file included from /pool/buildbot/slaves/sobornost/jdkX/build/src/hotspot/cpu/arm/c1_LIRGenerator_arm.cpp:30:0:
/pool/buildbot/slaves/sobornost/jdkX/build/src/hotspot/share/c1/c1_LIRGenerator.hpp:375:16: error: candidate is: LIR_Address* LIRGenerator::emit_array_address(LIR_Opr, LIR_Opr, BasicType)
   LIR_Address* emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr, BasicType type);
                ^~~~~~~~~~~~~~~~~~
/pool/buildbot/slaves/sobornost/jdkX/build/src/hotspot/cpu/arm/c1_LIRGenerator_arm.cpp:501:105: error: no 'void LIRGenerator::CardTableBarrierSet_post_barrier_helper(LIR_OprDesc*, LIR_Const*)' member function declared in class 'LIRGenerator'
 void LIRGenerator::CardTableBarrierSet_post_barrier_helper(LIR_OprDesc* addr, LIR_Const* card_table_base) {
                                                                                                         ^
/pool/buildbot/slaves/sobornost/jdkX/build/src/hotspot/cpu/arm/c1_LIRGenerator_arm.cpp: In member function 'LIR_OprDesc* LIRGenerator::atomic_xchg(BasicType, LIR_Opr, LIRItem&)':
/pool/buildbot/slaves/sobornost/jdkX/build/src/hotspot/cpu/arm/c1_LIRGenerator_arm.cpp:1027:11: error: 'addr_ptr' was not declared in this scope
   __ xchg(addr_ptr, data, dst, tmp);
           ^~~~~~~~
/pool/buildbot/slaves/sobornost/jdkX/build/src/hotspot/cpu/arm/c1_LIRGenerator_arm.cpp:1027:21: error: 'data' was not declared in this scope
   __ xchg(addr_ptr, data, dst, tmp);
                     ^~~~
/pool/buildbot/slaves/sobornost/jdkX/build/src/hotspot/cpu/arm/c1_LIRGenerator_arm.cpp:1027:27: error: 'dst' was not declared in this scope
   __ xchg(addr_ptr, data, dst, tmp);
                           ^~~
/bin/cp: cannot create regular file '/pool/buildbot/slaves/sobornost/jdkX/build/build/linux-arm-normal-server-fastdebug/make-support/failure-logs/hotspot_variant-server_libjvm_objs_c1_LIRGenerator_arm.o.log': No such file or directory