[LLVMbugs] [Bug 8892] New: CGSCCPassManager does not visit all functions.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8892

           Summary: CGSCCPassManager does not visit all functions.
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Interprocedural Optimizations
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: nlewycky at google.com
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=5945)
 --> (http://llvm.org/bugs/attachment.cgi?id=5945)
testcase

The call graph SCC pass manager does not visit any of the functions in this
example .ll file.

For fun, try running:
  opt -instcombine -debug x.ll
to see that it visits every function, then
  opt -functionattrs -instcombine -debug x.ll
to see that it visits none.

The pass' runOnSCC is being called only once with a single CallGraphNode, being
the external one (CGN->getFunction() == NULL).

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