RFR: 8303105: LoopRangeStrideTest fails IR verification on x86

[Jatin Bhateja]

SLP fails to recognize valid address expression during SWPointer creation for memory operands with 32 bit jvm, this prevents gathering adjacent memory operations. 
Debug trace with -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

Problem also exist in JDK17 LTS. As an interim solution to prevent this showing up as a GHA test failure, we can enable the test only for x86_64 and aarch64 targets. Difference in address expression b/w X86 32 and 64 bit jvm will be root caused in follow issue JDK-8303885.

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Commit messages:
 - 8303105: LoopRangeStrideTest fails IR verification on x86

Changes: https://git.openjdk.org/jdk/pull/12938/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12938&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8303105
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/12938.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12938/head:pull/12938

PR: https://git.openjdk.org/jdk/pull/12938