[LLVMbugs] [Bug 2436] New: doesn't track load and store with one unknown

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Thu Jun 12 15:04:44 PDT 2008


           Summary: doesn't track load and store with one unknown
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Scalar Optimizations
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: nlewycky at google.com
                CC: llvmbugs at cs.uiuc.edu

In this code, the call to abort() doesn't get optimized away.

  extern char *getPtr(void);

  void foo(int i) {
    char *arr[10];

    arr[i] = getPtr();
    arr[i][10] = 42;

    if (arr[i][10] != 42)

By constrast, if you remove "int i" everywhere, you'll find that we optimize it
down just fine.

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