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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.
60 lines
1.6 KiB
C++
60 lines
1.6 KiB
C++
// RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-apple-darwin10 -mconstructor-aliases -O1 -disable-llvm-passes | FileCheck %s
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struct Member {
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~Member();
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};
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struct A {
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virtual ~A();
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};
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struct B : A {
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Member m;
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virtual ~B();
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};
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// Complete dtor: just an alias because there are no virtual bases.
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// CHECK: @_ZN1BD1Ev ={{.*}} unnamed_addr alias {{.*}} @_ZN1BD2Ev
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// (aliases from C)
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// CHECK: @_ZN1CD2Ev ={{.*}} unnamed_addr alias {{.*}}, bitcast {{.*}} @_ZN1BD2Ev
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// CHECK: @_ZN1CD1Ev ={{.*}} unnamed_addr alias {{.*}} @_ZN1CD2Ev
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// Base dtor: actually calls A's base dtor.
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// CHECK-LABEL: define{{.*}} void @_ZN1BD2Ev(%struct.B* {{[^,]*}} %this) unnamed_addr
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// CHECK: call void @_ZN6MemberD1Ev
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// CHECK: call void @_ZN1AD2Ev
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// Deleting dtor: defers to the complete dtor.
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// CHECK-LABEL: define{{.*}} void @_ZN1BD0Ev(%struct.B* {{[^,]*}} %this) unnamed_addr
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// CHECK: call void @_ZN1BD1Ev
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// CHECK: call void @_ZdlPv
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B::~B() { }
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struct C : B {
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~C();
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};
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C::~C() { }
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// Complete dtor: just an alias (checked above).
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// Deleting dtor: defers to the complete dtor.
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// CHECK-LABEL: define{{.*}} void @_ZN1CD0Ev(%struct.C* {{[^,]*}} %this) unnamed_addr
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// CHECK: call void @_ZN1CD1Ev
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// CHECK: call void @_ZdlPv
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// Base dtor: just an alias to B's base dtor.
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namespace PR12798 {
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// A qualified call to a base class destructor should not undergo virtual
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// dispatch. Template instantiation used to lose the qualifier.
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struct A { virtual ~A(); };
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template<typename T> void f(T *p) { p->A::~A(); }
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// CHECK: define {{.*}} @_ZN7PR127981fINS_1AEEEvPT_(
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// CHECK: call void @_ZN7PR127981AD1Ev(
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template void f(A*);
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}
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