81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -std=c++1y -O1 -disable-llvm-passes %s -o - | FileCheck %s -check-prefix=CHECKA -check-prefix=CHECK
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -std=c++1y -O1 -disable-llvm-passes -fcxx-exceptions %s -o - | FileCheck %s -check-prefix=CHECKB -check-prefix=CHECK
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// expected-no-diagnostics
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// The variable template specialization x<Foo> generated in each file
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// should be 'internal global' and not 'linkonce_odr global'.
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template <typename T> int x = 42;
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// CHECK-DAG: @_Z1xIiE = linkonce_odr global
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// CHECK-DAG: @_Z1xIZL3foovE3FooE = internal global
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// 'static' affects the linkage of the global
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template <typename T> static int y = 42;
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// CHECK-DAG: @_ZL1yIiE = internal global
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// CHECK-DAG: @_ZL1yIZL3foovE3FooE = internal global
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// 'const' does not
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template <typename T> const int z = 42;
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// CHECK-DAG: @_Z1zIiE = linkonce_odr constant
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// CHECK-DAG: @_Z1zIZL3foovE3FooE = internal constant
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template <typename T> T t = 42;
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// CHECK-DAG: @_Z1tIiE = linkonce_odr global
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// CHECK-DAG: @_Z1tIKiE = linkonce_odr constant
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int mode;
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// CHECK-DAG: define internal dereferenceable(4) i32* @_ZL3foov(
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static const int &foo() {
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struct Foo { };
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switch (mode) {
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case 0:
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// CHECK-DAG: @_Z1xIiE
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return x<int>;
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case 1:
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// CHECK-DAG: @_Z1xIZL3foovE3FooE
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return x<Foo>;
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case 2:
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// CHECK-DAG: @_ZL1yIiE
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return y<int>;
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case 3:
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// CHECK-DAG: @_ZL1yIZL3foovE3FooE
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return y<Foo>;
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case 4:
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// CHECK-DAG: @_Z1zIiE
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return z<int>;
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case 5:
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// CHECK-DAG: @_Z1zIZL3foovE3FooE
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return z<Foo>;
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case 6:
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// CHECK-DAG: @_Z1tIiE
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return t<int>;
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case 7:
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// CHECK-DAG: @_Z1tIKiE
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return t<const int>;
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}
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}
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#if !__has_feature(cxx_exceptions) // File A
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// CHECKA-DAG: define dereferenceable(4) i32* @_Z3barv(
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const int &bar() {
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// CHECKA-DAG: call dereferenceable(4) i32* @_ZL3foov()
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return foo();
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}
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#else // File B
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// CHECKB-DAG: declare dereferenceable(4) i32* @_Z3barv(
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const int &bar();
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int main() {
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// CHECKB-DAG: call dereferenceable(4) i32* @_Z3barv()
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// CHECKB-DAG: call dereferenceable(4) i32* @_ZL3foov()
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&bar() == &foo() ? throw 0 : (void)0; // Should not throw exception at runtime.
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}
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#endif // end of Files A and B
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