a2347baaec
Because references must be initialized using some evaluated expression, they must point to something, and a callee can assume the reference parameter is dereferenceable. Taking advantage of a new attribute just added to LLVM, mark them as such. Because dereferenceability in addrspace(0) implies nonnull in the backend, we don't need both attributes. However, we need to know the size of the object to use the dereferenceable attribute, so for incomplete types we still emit only nonnull. llvm-svn: 213386
238 lines
6.5 KiB
C++
238 lines
6.5 KiB
C++
// RUN: %clang_cc1 -fms-extensions -emit-llvm %s -o - -mconstructor-aliases -triple=i386-pc-win32 | FileCheck %s
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// CHECK: @llvm.global_ctors = appending global [2 x { i32, void ()*, i8* }]
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// CHECK: [{ i32, void ()*, i8* } { i32 65535, void ()* @"\01??__Efoo@?$B@H@@2VA@@A@YAXXZ",
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// CHECK: i8* bitcast (%class.A* @"\01?foo@?$B@H@@2VA@@A" to i8*) },
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// CHECK: { i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__sub_I_microsoft_abi_static_initializers.cpp, i8* null }]
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struct S {
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S();
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~S();
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};
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S s;
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// CHECK: define internal void @"\01??__Es@@YAXXZ"()
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// CHECK: call x86_thiscallcc %struct.S* @"\01??0S@@QAE@XZ"
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// CHECK: call i32 @atexit(void ()* @"\01??__Fs@@YAXXZ")
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// CHECK: ret void
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// CHECK: define internal void @"\01??__Fs@@YAXXZ"()
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// CHECK: call x86_thiscallcc void @"\01??1S@@QAE@XZ"
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// CHECK: ret void
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// These globals should use distinct guard variables, and not different bits of
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// the same global.
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__declspec(selectany) S selectany1;
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__declspec(selectany) S selectany2;
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// CHECK: define linkonce_odr void @"\01??__Eselectany1@@YAXXZ"()
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// CHECK-NOT: @"\01??_Bselectany1
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// CHECK: call x86_thiscallcc %struct.S* @"\01??0S@@QAE@XZ"
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// CHECK: ret void
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// CHECK: define linkonce_odr void @"\01??__Eselectany2@@YAXXZ"()
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// CHECK-NOT: @"\01??_Bselectany2
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// CHECK: call x86_thiscallcc %struct.S* @"\01??0S@@QAE@XZ"
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// CHECK: ret void
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void StaticLocal() {
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static S TheS;
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}
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// CHECK-LABEL: define void @"\01?StaticLocal@@YAXXZ"()
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// CHECK: load i32* @"\01?$S1@?0??StaticLocal@@YAXXZ@4IA"
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// CHECK: store i32 {{.*}}, i32* @"\01?$S1@?0??StaticLocal@@YAXXZ@4IA"
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// CHECK: ret
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void MultipleStatics() {
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static S S1;
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static S S2;
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static S S3;
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static S S4;
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static S S5;
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static S S6;
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static S S7;
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static S S8;
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static S S9;
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static S S10;
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static S S11;
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static S S12;
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static S S13;
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static S S14;
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static S S15;
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static S S16;
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static S S17;
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static S S18;
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static S S19;
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static S S20;
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static S S21;
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static S S22;
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static S S23;
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static S S24;
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static S S25;
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static S S26;
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static S S27;
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static S S28;
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static S S29;
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static S S30;
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static S S31;
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static S S32;
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static S S33;
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static S S34;
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static S S35;
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}
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// CHECK-LABEL: define void @"\01?MultipleStatics@@YAXXZ"()
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// CHECK: load i32* @"\01?$S1@?0??MultipleStatics@@YAXXZ@4IA"
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// CHECK: and i32 {{.*}}, 1
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// CHECK: and i32 {{.*}}, 2
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// CHECK: and i32 {{.*}}, 4
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// CHECK: and i32 {{.*}}, 8
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// CHECK: and i32 {{.*}}, 16
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// ...
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// CHECK: and i32 {{.*}}, -2147483648
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// CHECK: load i32* @"\01?$S1@?0??MultipleStatics@@YAXXZ@4IA1"
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// CHECK: and i32 {{.*}}, 1
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// CHECK: and i32 {{.*}}, 2
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// CHECK: and i32 {{.*}}, 4
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// CHECK: ret
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// Force WeakODRLinkage by using templates
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class A {
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public:
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A() {}
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~A() {}
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int a;
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};
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template<typename T>
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class B {
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public:
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static A foo;
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};
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template<typename T> A B<T>::foo;
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inline S &UnreachableStatic() {
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if (0) {
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static S s; // bit 1
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return s;
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}
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static S s; // bit 2
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return s;
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}
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// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.S* @"\01?UnreachableStatic@@YAAAUS@@XZ"()
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// CHECK: and i32 {{.*}}, 2
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// CHECK: or i32 {{.*}}, 2
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// CHECK: ret
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inline S &getS() {
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static S TheS;
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return TheS;
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}
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// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.S* @"\01?getS@@YAAAUS@@XZ"
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// CHECK: load i32* @"\01??_B?1??getS@@YAAAUS@@XZ@51"
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// CHECK: and i32 {{.*}}, 1
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// CHECK: icmp ne i32 {{.*}}, 0
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// CHECK: br i1
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// init:
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// CHECK: or i32 {{.*}}, 1
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// CHECK: store i32 {{.*}}, i32* @"\01??_B?1??getS@@YAAAUS@@XZ@51"
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// CHECK: call x86_thiscallcc %struct.S* @"\01??0S@@QAE@XZ"(%struct.S* @"\01?TheS@?1??getS@@YAAAUS@@XZ@4U2@A")
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// CHECK: call i32 @atexit(void ()* @"\01??__FTheS@?1??getS@@YAAAUS@@XZ@YAXXZ")
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// CHECK: br label
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// init.end:
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// CHECK: ret %struct.S* @"\01?TheS@?1??getS@@YAAAUS@@XZ@4U2@A"
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inline int enum_in_function() {
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// CHECK-LABEL: define linkonce_odr i32 @"\01?enum_in_function@@YAHXZ"()
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static enum e { foo, bar, baz } x;
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// CHECK: @"\01?x@?1??enum_in_function@@YAHXZ@4W4e@?1??1@YAHXZ@A"
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static int y;
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// CHECK: @"\01?y@?1??enum_in_function@@YAHXZ@4HA"
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return x + y;
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};
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struct T {
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enum e { foo, bar, baz };
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int enum_in_struct() {
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// CHECK-LABEL: define linkonce_odr x86_thiscallcc i32 @"\01?enum_in_struct@T@@QAEHXZ"
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static int x;
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// CHECK: @"\01?x@?1??enum_in_struct@T@@QAEHXZ@4HA"
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return x++;
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}
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};
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inline int switch_test(int x) {
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// CHECK-LABEL: define linkonce_odr i32 @"\01?switch_test@@YAHH@Z"(i32 %x)
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switch (x) {
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static int a;
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// CHECK: @"\01?a@?3??switch_test@@YAHH@Z@4HA"
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case 0:
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a++;
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return 1;
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case 1:
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static int b;
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// CHECK: @"\01?b@?3??switch_test@@YAHH@Z@4HA"
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return b++;
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case 2: {
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static int c;
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// CHECK: @"\01?c@?4??switch_test@@YAHH@Z@4HA"
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return b + c++;
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}
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};
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}
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int f();
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inline void switch_test2() {
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// CHECK-LABEL: define linkonce_odr void @"\01?switch_test2@@YAXXZ"()
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// CHECK: @"\01?x@?2??switch_test2@@YAXXZ@4HA"
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switch (1) default: static int x = f();
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}
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namespace DynamicDLLImportInitVSMangling {
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// Failing to pop the ExprEvalContexts when instantiating a dllimport var with
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// dynamic initializer would cause subsequent static local numberings to be
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// incorrect.
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struct NonPOD { NonPOD(); };
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template <typename T> struct A { static NonPOD x; };
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template <typename T> NonPOD A<T>::x;
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template struct __declspec(dllimport) A<int>;
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inline int switch_test3() {
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// CHECK-LABEL: define linkonce_odr i32 @"\01?switch_test3@DynamicDLLImportInitVSMangling@@YAHXZ"
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static int local;
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// CHECK: @"\01?local@?1??switch_test3@DynamicDLLImportInitVSMangling@@YAHXZ@4HA"
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return local++;
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}
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}
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void force_usage() {
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UnreachableStatic();
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getS();
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(void)B<int>::foo; // (void) - force usage
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enum_in_function();
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(void)&T::enum_in_struct;
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switch_test(1);
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switch_test2();
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DynamicDLLImportInitVSMangling::switch_test3();
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}
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// CHECK: define linkonce_odr void @"\01??__Efoo@?$B@H@@2VA@@A@YAXXZ"()
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// CHECK-NOT: and
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// CHECK-NOT: ?_Bfoo@
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// CHECK: call x86_thiscallcc %class.A* @"\01??0A@@QAE@XZ"
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// CHECK: call i32 @atexit(void ()* @"\01??__Ffoo@?$B@H@@2VA@@A@YAXXZ")
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// CHECK: ret void
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// CHECK: define linkonce_odr x86_thiscallcc %class.A* @"\01??0A@@QAE@XZ"
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// CHECK: define linkonce_odr x86_thiscallcc void @"\01??1A@@QAE@XZ"
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// CHECK: define internal void @"\01??__Ffoo@?$B@H@@2VA@@A@YAXXZ"
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// CHECK: call x86_thiscallcc void @"\01??1A@@QAE@XZ"{{.*}}foo
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// CHECK: ret void
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// CHECK: define internal void @_GLOBAL__sub_I_microsoft_abi_static_initializers.cpp()
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// CHECK: call void @"\01??__Es@@YAXXZ"()
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// CHECK: ret void
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