[jdk11u-dev] RFR: 8288467: remove memory_operand assert for spilled instructions

[Goetz Lindenmaier]

I backport this for parity with 11.0.17-oracle

I had to do a trivial resolve.

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Depends on: https://git.openjdk.org/jdk11u-dev/pull/1185

Commit messages:
 - Backport af05139133530871c88991aa0340205cfc44972a

Changes: https://git.openjdk.org/jdk11u-dev/pull/1188/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1188&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8288467
  Stats: 7 lines in 1 file changed: 5 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1188.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1188/head:pull/1188

PR: https://git.openjdk.org/jdk11u-dev/pull/1188