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re PR c++/65143 ([C++11] missing devirtualization for virtual base in "final" classes)

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2019-07-08  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/65143
	* g++.dg/tree-ssa/final2.C: New.
	* g++.dg/tree-ssa/final3.C: Likewise.

From-SVN: r273228
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Paolo Carlini 2019-07-08 09:51:07 +00:00 • committed by Paolo Carlini
parent 9118c5e1a3
commit 75b41faa23
3 changed files with 64 additions and 0 deletions
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6
gcc/testsuite/ChangeLog
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2019-07-08 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/65143
* g++.dg/tree-ssa/final2.C: New.
* g++.dg/tree-ssa/final3.C: Likewise.
2019-07-08 Javier Miranda <miranda@adacore.com>
* gnat.dg/interface10.adb: New testcase.

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gcc/testsuite/g++.dg/tree-ssa/final2.C Normal file
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// PR c++/65143
// { dg-do compile { target c++11 } }
// { dg-additional-options -fdump-tree-gimple }
// { dg-final { scan-tree-dump-times "vptr" 1 gimple } }
struct A
{
int i();
};
struct B : public virtual A
{
int get()
{
return A::i() + 1;
}
};
struct C final : public B
{
int get()
{
return A::i() + 2;
}
};
int foo(C& c)
{
return c.get(); // Need not go via vtable pointer as class C is final
}
int foo(B& b2)
{
return b2.get(); // This has to go via vtable as most derived class can change the location of A
}

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gcc/testsuite/g++.dg/tree-ssa/final3.C Normal file
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// PR c++/65143
// { dg-do compile { target c++11 } }
// { dg-additional-options -fdump-tree-gimple }
// { dg-final { scan-tree-dump-not "vptr" gimple } }
struct A
{
int j;
};
struct B : public virtual A
{
};
struct C final : public B
{
int get();
};
int C::get()
{
return A::j;
}