RFR: 8322781: C1: Debug build crash in GraphBuilder::vmap() when print stats

[Denghui Dong]

Hi,

Could I have a review of this fix patch that fixes a crash problem in the debug build when -XX:+PrintValueNumbering -XX:+Verbose -XX:-UseLocalValueNumbering

Thanks

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Commit messages:
 - 8322781: C1: Debug build crash in GraphBuilder::vmap() when print stats

Changes: https://git.openjdk.org/jdk/pull/17205/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17205&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8322781
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/17205.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17205/head:pull/17205

PR: https://git.openjdk.org/jdk/pull/17205