[LLVMbugs] [Bug 13559] New: clang fails to apply constructor alias optimization

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=13559

             Bug #: 13559
           Summary: clang fails to apply constructor alias optimization
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: LLVM Codegen
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: nlewycky at google.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


On this testcase:

  struct X {
    X(int j) : i(j) {}
    int i;
  };

  int main() {
    X x(10);
  }

$ clang b6940259.cc -flto -S -o - -O3 -mllvm -disable-llvm-optzns

emits a @_ZN1XC1Ei that calls @_ZN1XC2Ei. It should just be an alias.

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