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6b3351792c
For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie
and COFF, but not for Mach-O. This nuance causes unneeded binary format differences.
This patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `
if there is an explicit linkage.
* Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar.
* Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
49 lines
2.4 KiB
C++
49 lines
2.4 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fapple-kext -fno-rtti -disable-O0-optnone -emit-llvm -o - %s | FileCheck %s
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// CHECK: @_ZTV5TemplIiE = internal unnamed_addr constant { [7 x i8*] } { [7 x i8*] [i8* null, i8* null, i8* bitcast (void (%struct.Templ*)* @_ZN5TemplIiED1Ev to i8*), i8* bitcast (void (%struct.Templ*)* @_ZN5TemplIiED0Ev to i8*), i8* bitcast (void (%struct.Templ*)* @_ZN5TemplIiE1fEv to i8*), i8* bitcast (void (%struct.Templ*)* @_ZN5TemplIiE1gEv to i8*), i8* null] }
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struct B1 {
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virtual ~B1();
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};
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B1::~B1() {}
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void DELETE(B1 *pb1) {
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pb1->B1::~B1();
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}
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// CHECK-LABEL: define{{.*}} void @_ZN2B1D0Ev
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// CHECK: [[T1:%.*]] = load void (%struct.B1*)*, void (%struct.B1*)** getelementptr inbounds (void (%struct.B1*)*, void (%struct.B1*)** bitcast ({ [5 x i8*] }* @_ZTV2B1 to void (%struct.B1*)**), i64 2)
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// CHECK-NEXT: call void [[T1]](%struct.B1* {{[^,]*}} [[T2:%.*]])
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// CHECK-LABEL: define{{.*}} void @_Z6DELETEP2B1
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// CHECK: [[T3:%.*]] = load void (%struct.B1*)*, void (%struct.B1*)** getelementptr inbounds (void (%struct.B1*)*, void (%struct.B1*)** bitcast ({ [5 x i8*] }* @_ZTV2B1 to void (%struct.B1*)**), i64 2)
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// CHECK-NEXT: call void [[T3]](%struct.B1* {{[^,]*}} [[T4:%.*]])
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template<class T>
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struct Templ {
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virtual ~Templ(); // Out-of-line so that the destructor doesn't cause a vtable
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virtual void f() {}
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virtual void g() {}
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};
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template<class T>
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struct SubTempl : public Templ<T> {
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virtual ~SubTempl() {} // override
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virtual void f() {} // override
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virtual void g() {} // override
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};
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void f(SubTempl<int>* t) {
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// Qualified calls go through the (qualified) vtable in apple-kext mode.
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// Since t's this pointer points to SubTempl's vtable, the call needs
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// to load Templ<int>'s vtable. Hence, Templ<int>::g needs to be
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// instantiated in this TU, for it's referenced by the vtable.
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// (This happens only in apple-kext mode; elsewhere virtual calls can always
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// use the vtable pointer off this instead of having to load the vtable
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// symbol.)
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t->Templ::~Templ();
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}
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// CHECK: getelementptr inbounds (void (%struct.Templ*)*, void (%struct.Templ*)** bitcast ({ [7 x i8*] }* @_ZTV5TemplIiE to void (%struct.Templ*)**), i64 2)
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// CHECK: declare void @_ZN5TemplIiED0Ev(%struct.Templ* {{[^,]*}})
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// CHECK: define internal void @_ZN5TemplIiE1fEv(%struct.Templ* {{[^,]*}} %this)
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// CHECK: define internal void @_ZN5TemplIiE1gEv(%struct.Templ* {{[^,]*}} %this)
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