[LLVMbugs] [Bug 12342] New: -enable-iv-rewrite=false creates significant size regressions

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12342

             Bug #: 12342
           Summary: -enable-iv-rewrite=false creates significant size
                    regressions
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Scalar Optimizations
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: joerg at NetBSD.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 8262
  --> http://llvm.org/bugs/attachment.cgi?id=8262
Files that compile to different sizes and list

Attached is the list of all files from NetBSD's libkern, libsa and libi386 that
differ in code size between -enable-iv-rewrite=false and
-enable-iv-rewrite=true. Some of them are not used in this context. The
false.txt / true.txt list the object sizes as I see it during the release
build. compile.sh */*.i will compile the files with both options. Big
regressions are e.g. qsort.i, improvements are seen for subr_prf.i

-- 
Configure bugmail: http://llvm.org/bugs/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.