[LLVMbugs] [Bug 7314] New: Memory accesses not optimised inside a loop

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Tue Jun 8 05:05:44 CDT 2010


http://llvm.org/bugs/show_bug.cgi?id=7314

           Summary: Memory accesses not optimised inside a loop
           Product: new-bugs
           Version: 2.7
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: xordan at gmail.com
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=4988)
 --> (http://llvm.org/bugs/attachment.cgi?id=4988)
Example code

There seems to be a bug of some kind where loads and stores in a loop body
which could be optimised into registers aren't being done so.

I've attached some example code showing the small input function and the .ll
output.

The file was compiled using; clang.exe -cc1 -O3 -emit-llvm loop.cl

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