Test: LoopRangeStrideTest.countDownLoopWithNegScale fails to vectorized on x86.

Problem is around recognizing valid address expression during SWPointer creation for memory operands with 32 bit jvm, this prevents gathering adjacent memory operations. -XX:+TraceSuperWord -XX:+TraceNewVectors -XX:CompileCommand=VectorizeDebug,<method>,3 shows following errors .

SWPointer::memory_alignment: SWPointer p invalid, return bottom_align
SWPointer::memory_alignment: SWPointer p invalid, return bottom_align
SWPointer::memory_alignment: SWPointer p invalid, return bottom_align
SWPointer::memory_alignment: SWPointer p invalid, return bottom_align
SWPointer::memory_alignment: SWPointer p invalid, return bottom_align

Behavior also exist in JDK17 LTS.