[LLVMbugs] [Bug 24130] New: missing comdat at -O1

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=24130

            Bug ID: 24130
           Summary: missing comdat at -O1
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: rafael.espindola at gmail.com
                CC: geek4civic at gmail.com, llvmbugs at cs.uiuc.edu,
                    peter at pcc.me.uk
    Classification: Unclassified

Given

struct A {
  virtual ~A();
};
struct B {
  virtual void foo();
};
struct C : public A, public B {
  void foo() {}
};
struct D : public C {
  ~D();
};
D::~D() {}

We produce

define linkonce_odr void @_ZThn8_N1C3fooEv(%struct.C* %this) unnamed_addr #0
comdat align 2 {

at -O0 and

define linkonce_odr void @_ZThn8_N1C3fooEv(%struct.C* nocapture %this)
unnamed_addr #3 align 2 {

at -O1

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