[Bug target/66822] New: Turn off X86_TUNE_ZERO_EXTEND_WITH_AND for IAMCU

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66822

            Bug ID: 66822
           Summary: Turn off X86_TUNE_ZERO_EXTEND_WITH_AND for IAMCU
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: julia.koval at intel dot com
  Target Milestone: ---

Since X86_TUNE_ZERO_EXTEND_WITH_AND generates bigger code, should
it be turned off for IAMCU?