[LLVMbugs] [Bug 8359] New: ARM allocates invalid registers for VFPv3-D16 (possibly allocating D16, D17 etc.)

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8359

           Summary: ARM allocates invalid registers for VFPv3-D16
                    (possibly allocating D16, D17 etc.)
           Product: tools
           Version: trunk
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: llc
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: jvoung at google.com
                CC: llvmbugs at cs.uiuc.edu


The ARM backend may end up allocating registers D16 to D31 when "-mattr=+vfp3"
is specified. However, this will not work for hardware that only supports 16
registers.

Attached is a possible fix, adding a new flag to support -"mattr=+vfp3,+d16".

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