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fd739804e0
For a default visibility external linkage definition, dso_local is set for ELF
-fno-pic/-fpie and COFF and Mach-O. Since default clang -cc1 for ELF is similar
to -fpic ("PIC Level" is not set), this nuance causes unneeded binary format differences.
To make emitted IR similar, ELF -cc1 -fpic will default to -fno-semantic-interposition,
which sets dso_local for default visibility external linkage definitions.
To make this flip smooth and enable future (dso_local as definition default),
this patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `.
86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
// RUN: %clang_cc1 -std=c++11 -S -triple x86_64-none-linux-gnu -emit-llvm -o - %s | FileCheck %s
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namespace std {
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typedef decltype(sizeof(int)) size_t;
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// libc++'s implementation with __size_ replaced by __end_
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template <class _E>
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class initializer_list
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{
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const _E* __begin_;
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const _E* __end_;
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initializer_list(const _E* __b, const _E* __e)
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: __begin_(__b),
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__end_(__e)
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{}
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public:
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typedef _E value_type;
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typedef const _E& reference;
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typedef const _E& const_reference;
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typedef size_t size_type;
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typedef const _E* iterator;
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typedef const _E* const_iterator;
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initializer_list() : __begin_(nullptr), __end_(nullptr) {}
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size_t size() const {return __end_ - __begin_;}
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const _E* begin() const {return __begin_;}
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const _E* end() const {return __end_;}
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};
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}
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// CHECK: @_ZGR15globalInitList1_ = internal constant [3 x i32] [i32 1, i32 2, i32 3]
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// CHECK: @globalInitList1 ={{.*}} global {{[^ ]+}} { i32* getelementptr inbounds ([3 x i32], [3 x i32]* @_ZGR15globalInitList1_, {{[^)]*}}), i32*
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std::initializer_list<int> globalInitList1 = {1, 2, 3};
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void fn1(int i) {
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// CHECK-LABEL: define{{.*}} void @_Z3fn1i
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// temporary array
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// CHECK: [[array:%[^ ]+]] = alloca [3 x i32]
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// CHECK: getelementptr inbounds [3 x i32], [3 x i32]* [[array]], i{{32|64}} 0
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// CHECK-NEXT: store i32 1, i32*
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// CHECK-NEXT: getelementptr
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// CHECK-NEXT: store
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// CHECK-NEXT: getelementptr
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// CHECK-NEXT: load
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// CHECK-NEXT: store
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// init the list
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// CHECK-NEXT: getelementptr
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// CHECK-NEXT: getelementptr inbounds [3 x i32], [3 x i32]*
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// CHECK-NEXT: store i32*
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// CHECK-NEXT: getelementptr
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// CHECK-NEXT: getelementptr inbounds [3 x i32], [3 x i32]* [[array]], i{{32|64}} 0, i{{32|64}} 3
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// CHECK-NEXT: store i32*
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std::initializer_list<int> intlist{1, 2, i};
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}
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struct destroyme1 {
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~destroyme1();
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};
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struct destroyme2 {
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~destroyme2();
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};
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void fn2() {
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// CHECK-LABEL: define{{.*}} void @_Z3fn2v
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void target(std::initializer_list<destroyme1>);
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// objects should be destroyed before dm2, after call returns
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target({ destroyme1(), destroyme1() });
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// CHECK: call void @_ZN10destroyme1D1Ev
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destroyme2 dm2;
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// CHECK: call void @_ZN10destroyme2D1Ev
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}
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void fn3() {
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// CHECK-LABEL: define{{.*}} void @_Z3fn3v
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// objects should be destroyed after dm2
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auto list = { destroyme1(), destroyme1() };
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destroyme2 dm2;
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// CHECK: call void @_ZN10destroyme2D1Ev
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// CHECK: call void @_ZN10destroyme1D1Ev
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}
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