[Bug rtl-optimization/59535] New: [4.9 regression] -Os code size regressions for Thumb1/Thumb2 (with LRA)?

[rearnsha at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59535

            Bug ID: 59535
           Summary: [4.9 regression] -Os code size regressions for
                    Thumb1/Thumb2 (with LRA)?
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rearnsha at gcc dot gnu.org
                CC: ramana.radhakrishnan at arm dot com, vmakarov at redhat dot 
com,
                    yvan.roux at linaro dot org
            Target: arm

Running the CSiBE benchmark for -Os with Thumb1 and Thumb2 code generation
shows significant regressions since 11/12/13 (the day LRA was turned on by
default for ARM).  These cause code size to grow back to the size it was in
2011.

I'll try to find some simple examples to use as test cases.