[LLVMbugs] [Bug 2396] New: Miscompilation with stack realignment

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Sat May 31 11:12:58 PDT 2008


           Summary: Miscompilation with stack realignment
           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=1686)
 --> (http://llvm.org/bugs/attachment.cgi?id=1686)
Testcase (IL)

Attached testcase requires the stack to be realigned on Linux-x86 because it
uses align 16 on an alloca.  This causes the code to be miscompiled to hang for
a while, then eventually crash.  If the align 16 is removed, the test finishes
almost instantly.

Crash occurs when compiled with "llvm-as | llc | gcc -x assembler -" on Ubuntu
Linux x86.

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