[LLVMbugs] [Bug 1482] NEW: Compiling generated .c file (by llc) on Linux X86 fails

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=1482

           Summary: Compiling generated .c file (by llc) on Linux X86 fails
           Product: new-bugs
           Version: unspecified
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: bram.adams at ugent.be


On Linux X86, I get this while compiling a generated .c file (by llc):

error: unknown register name 'S' in 'asm'

This is the offending line in the attached .c file (notice the "S" on the last line):

  __asm__ volatile ("\tpushal\t\t\t\t\n\tmovl %0,%%esi\t\t\n\tmovl %1,%%edi\t\t\n\tcall *%2\t\t\t\n
\tmovl %%esi,%0\t\t\n\tmo\
vl %%edi,%1\t\t\n\tpopal\t\t\t\t\n"
        :"=m"(memProgramStack_2E_5872),"=m"(memOpStack_2E_5873)
        :"m"(memEntryPoint_2E_5874),"m"(memProgramStack_2E_5872),"m"(memOpStack_2E_5873)
        :"D","S");

Apparently, leaving out "S" helps (compiling the .c file works), but what does it do and why is it here?



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