[LLVMbugs] [Bug 2019] New: Crash in codegen with inline asm using "+S" and "+D" operands

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Mon Feb 11 21:09:23 PST 2008


           Summary: Crash in codegen with inline asm using "+S" and "+D"
           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

C code at http://llvm.org/bugs/attachment.cgi?id=1397. llvm-gcc and clang
compile this code to different asm statements, leading to different asserts.

With llvm-gcc, this triggers a "matching constraints for memory operands unimp"
assertion in SelectionDAGISel.  Despite this, I'm pretty sure this is unrelated
to Bug 1133.

clang, on the other hand, triggers a "Unknown constraint type" in

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