compiling with warnings as errors on ARM 32 yields:

In file included from /home/bellsoft/jdk/src/hotspot/cpu/arm/assembler_arm.hpp:400:0,
                 from /home/bellsoft/jdk/src/hotspot/share/asm/assembler.hpp:454,
                 from /home/bellsoft/jdk/src/hotspot/share/precompiled/precompiled.hpp:31:
/home/bellsoft/jdk/src/hotspot/cpu/arm/assembler_arm_32.hpp: In function ‘void Assembler::vdupI(FloatRegister, Register, Assembler::VElem_Size, int, AsmCondition)’:
/home/bellsoft/jdk/src/hotspot/cpu/arm/assembler_arm_32.hpp:1099:9: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized]
     int b;
         ^
/home/bellsoft/jdk/src/hotspot/cpu/arm/assembler_arm_32.hpp:1100:9: warning: ‘e’ may be used uninitialized in this function [-Wmaybe-uninitialized]
     int e;
         ^
/home/bellsoft/jdk/src/hotspot/cpu/arm/assembler_arm_32.hpp: In member function ‘void Assembler::vmovI(FloatRegister, int, Assembler::VElem_Size, int)’:
/home/bellsoft/jdk/src/hotspot/cpu/arm/assembler_arm_32.hpp:1070:9: warning: ‘cmode’ may be used uninitialized in this function [-Wmaybe-uninitialized]
     int cmode;
         ^~~~~
/home/bellsoft/jdk/src/hotspot/cpu/arm/assembler_arm_32.hpp: In member function ‘void Assembler::vdupI(FloatRegister, Register, Assembler::VElem_Size, int, AsmCondition)’:
/home/bellsoft/jdk/src/hotspot/cpu/arm/assembler_arm_32.hpp:1099:9: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized]
     int b;
         ^
/home/bellsoft/jdk/src/hotspot/cpu/arm/assembler_arm_32.hpp:1100:9: warning: ‘e’ may be used uninitialized in this function [-Wmaybe-uninitialized]
     int e;
         ^
In file included from /home/bellsoft/jdk/src/hotspot/cpu/arm/c1_CodeStubs_arm.cpp:27:0:
/home/bellsoft/jdk/src/hotspot/share/c1/c1_CodeStubs.hpp: In constructor ‘RangeCheckStub::RangeCheckStub(CodeEmitInfo*, LIR_Opr, LIR_Opr)’:
/home/bellsoft/jdk/src/hotspot/share/c1/c1_CodeStubs.hpp:151:17: warning: ‘RangeCheckStub::_throw_index_out_of_bounds_exception’ will be initialized after [-Wreorder]
   bool _throw_index_out_of_bounds_exception;
                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/bellsoft/jdk/src/hotspot/share/c1/c1_CodeStubs.hpp:149:17: warning: ‘LIR_OprDesc* RangeCheckStub::_index’ [-Wreorder]
   LIR_Opr _index;
                 ^~~~~~
/home/bellsoft/jdk/src/hotspot/cpu/arm/c1_CodeStubs_arm.cpp:54:1: warning: when initialized here [-Wreorder]
 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, LIR_Opr array)
 ^~~~~~~~~~~~~~
In file included from /home/bellsoft/jdk/src/hotspot/cpu/arm/c1_CodeStubs_arm.cpp:27:0:
/home/bellsoft/jdk/src/hotspot/share/c1/c1_CodeStubs.hpp: In constructor ‘RangeCheckStub::RangeCheckStub(CodeEmitInfo*, LIR_Opr)’:
/home/bellsoft/jdk/src/hotspot/share/c1/c1_CodeStubs.hpp:151:17: warning: ‘RangeCheckStub::_throw_index_out_of_bounds_exception’ will be initialized after [-Wreorder]
   bool _throw_index_out_of_bounds_exception;
                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/bellsoft/jdk/src/hotspot/share/c1/c1_CodeStubs.hpp:149:17: warning: ‘LIR_OprDesc* RangeCheckStub::_index’ [-Wreorder]
   LIR_Opr _index;
                 ^~~~~~
/home/bellsoft/jdk/src/hotspot/cpu/arm/c1_CodeStubs_arm.cpp:60:1: warning: when initialized here [-Wreorder]
 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index)
 ^~~~~~~~~~~~~~