[LLVMbugs] [Bug 2078] New: LLVM allocates eax as an input register for inline asm when it is in the clobber list

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=2078

           Summary: LLVM allocates eax as an input register for inline asm
                    when it is in the clobber list
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: sharparrow1 at yahoo.com
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=1440)
 --> (http://llvm.org/bugs/attachment.cgi?id=1440)
Source for testcase

Steps to reproduce: run source through llvm-gcc -S, and note this code will
always instantly crash.

The asm expects to be able to use eax because it is in the clobber list, but
one of the inputs ends up getting allocated into eax.  I don't know the exact
rules here, but we should probably be compatible with gcc.

Testcase reduced from ffmpeg.


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