[LLVMbugs] [Bug 3339] New: Bug when compiling OS kernel code

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=3339

           Summary: Bug when compiling OS kernel code
           Product: libraries
           Version: 2.4
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: compile-fail
          Severity: major
          Priority: P2
         Component: Backend: C
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: yim6 at illinois.edu
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=2392)
 --> (http://llvm.org/bugs/attachment.cgi?id=2392)
Testcase that causes a compile error

The attached is a testcase which causes a back-end error in LLVM 2.4.
 These types of assembly routines are mainly used in OS kernels. 
 I checked that GCC 4.3 works for this routine.

 The error messsage is ...
         Couldn't allocate output reg for constraint 'A'!


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