[LLVMbugs] [Bug 5668] New: thumb2 folding of constant addresses unhelpful

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Wed Dec 2 10:27:46 PST 2009


           Summary: thumb2 folding of constant addresses unhelpful
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Backend: ARM
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: bagel99 at gmail.com
                CC: llvmbugs at cs.uiuc.edu

Created an attachment (id=3907)
 --> (http://llvm.org/bugs/attachment.cgi?id=3907)
test case

When addresses are a displacement from a constant (this can happen in device 
drivers), the resulting address gets folded rather than using base+displacement 
addressing.  This results in code bloat.

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