[LLVMbugs] [Bug 22801] New: CFL-AA doesn't understand internal global values properly

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=22801

            Bug ID: 22801
           Summary: CFL-AA doesn't understand internal global values
                    properly
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Global Analyses
          Assignee: unassignedbugs at nondot.org
          Reporter: james.molloy at arm.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

In the following code:

static int g_1 = 0;
int f3(int n, int * a) {
    int i;
    for (i = 0; i < n; ++i) {
    g_1 += a[i];
    }
    return g_1;
}

We know g_1 is internal and does not escape, therefore it cannot alias with
a[i]. CFL cannot currently work this out.

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