llvm-project

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// Check that instrprof does not introduce references to discarded sections when
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// using comdats.
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//
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// Occasionally, it is possible that the same function can be compiled in
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// different TUs with slightly different linkages, e.g., due to different
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// compiler options. However, if these are comdat functions, a single
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// implementation will be chosen at link time. we want to ensure that the
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// profiling data does not contain a reference to the discarded section.
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// UNSUPPORTED: target={{.*windows.*}}
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// RUN: mkdir -p %t.d
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// RUN: %clangxx_pgogen -O2 -fPIC -ffunction-sections -fdata-sections -c %s -o %t.d/a1.o -DOBJECT_1 -mllvm -disable-preinline
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// RUN: %clangxx_pgogen -O2 -fPIC -ffunction-sections -fdata-sections -c %s -o %t.d/a2.o
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// RUN: %clangxx_pgogen -fPIC -shared -o %t.d/liba.so %t.d/a1.o %t.d/a2.o 2>&1 | FileCheck %s --allow-empty
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// Ensure that we don't get an error when linking
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// CHECK-NOT: relocation refers to a discarded section: .text._ZN1CIiE1fEi
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template <typename T> struct C {
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  void f(T x);
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  int g(T x) {
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    f(x);
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    return v;
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  }
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  int v;
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};
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template <typename T>
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#ifdef OBJECT_1
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__attribute__((weak))
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#else
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__attribute__((noinline))
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#endif
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void C<T>::f(T x) {
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  v += x;
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}
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#ifdef OBJECT_1
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int foo() {
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  C<int> c;
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  c.f(1);
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  return c.g(2);
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}
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#else
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int bar() {
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  C<int> c;
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  c.f(3);
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  return c.g(4);
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}
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#endif
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