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
243 lines
6.2 KiB
C++
243 lines
6.2 KiB
C++
// RUN: %clang_cc1 -std=c++11 -triple x86_64-apple-darwin10 %s -emit-llvm -o %t
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// RUN: FileCheck %s < %t
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// RUN: FileCheck -check-prefix=CHECK-PR10720 %s < %t
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extern "C" int printf(...);
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struct M {
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M() { printf("M()\n"); }
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M(int i) { iM = i; printf("M(%d)\n", i); }
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int iM;
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void MPR() {printf("iM = %d\n", iM); };
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};
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struct P {
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P() { printf("P()\n"); }
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P(int i) { iP = i; printf("P(%d)\n", i); }
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int iP;
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void PPR() {printf("iP = %d\n", iP); };
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};
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struct Q {
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Q() { printf("Q()\n"); }
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Q(int i) { iQ = i; printf("Q(%d)\n", i); }
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int iQ;
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void QPR() {printf("iQ = %d\n", iQ); };
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};
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struct N : M , P, Q {
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N() : f1(1.314), P(2000), ld(00.1234+f1), M(1000), Q(3000),
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d1(3.4567), i1(1234), m1(100) { printf("N()\n"); }
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M m1;
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M m2;
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float f1;
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int i1;
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float d1;
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void PR() {
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printf("f1 = %f d1 = %f i1 = %d ld = %f \n", f1,d1,i1, ld);
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MPR();
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PPR();
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QPR();
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printf("iQ = %d\n", iQ);
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printf("iP = %d\n", iP);
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printf("iM = %d\n", iM);
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// FIXME. We don't yet support this syntax.
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// printf("iQ = %d\n", (*this).iQ);
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printf("iQ = %d\n", this->iQ);
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printf("iP = %d\n", this->iP);
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printf("iM = %d\n", this->iM);
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}
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float ld;
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float ff;
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M arr_m[3];
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P arr_p[1][3];
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Q arr_q[2][3][4];
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};
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int main() {
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M m1;
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N n1;
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n1.PR();
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}
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// PR5826
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template <class T> struct A {
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A() {}
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A(int) {}
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A(const A&) {}
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~A() {}
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operator int() {return 0;}
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};
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// CHECK-LABEL: define void @_Z1fv()
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void f() {
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// CHECK: call void @_ZN1AIsEC1Ei
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A<short> a4 = 97;
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// CHECK-NEXT: store i32 17
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int i = 17;
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// CHECK-NEXT: call void @_ZN1AIsED1Ev
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// CHECK-NOT: call void @_ZN1AIsED1Ev
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// CHECK: ret void
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}
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// Make sure we initialize the vtable pointer if it's required by a
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// base initializer.
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namespace InitVTable {
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struct A { A(int); };
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struct B : A {
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virtual int foo();
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B();
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B(int);
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};
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// CHECK-LABEL: define void @_ZN10InitVTable1BC2Ev(%"struct.InitVTable::B"* %this) unnamed_addr
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// CHECK: [[T0:%.*]] = bitcast [[B:%.*]]* [[THIS:%.*]] to i8***
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// CHECK-NEXT: store i8** getelementptr inbounds ([3 x i8*]* @_ZTVN10InitVTable1BE, i64 0, i64 2), i8*** [[T0]]
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// CHECK: [[VTBL:%.*]] = load i32 ([[B]]*)*** {{%.*}}
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// CHECK-NEXT: [[FNP:%.*]] = getelementptr inbounds i32 ([[B]]*)** [[VTBL]], i64 0
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// CHECK-NEXT: [[FN:%.*]] = load i32 ([[B]]*)** [[FNP]]
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// CHECK-NEXT: [[ARG:%.*]] = call i32 [[FN]]([[B]]* [[THIS]])
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// CHECK-NEXT: call void @_ZN10InitVTable1AC2Ei({{.*}}* {{%.*}}, i32 [[ARG]])
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// CHECK-NEXT: [[T0:%.*]] = bitcast [[B]]* [[THIS]] to i8***
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// CHECK-NEXT: store i8** getelementptr inbounds ([3 x i8*]* @_ZTVN10InitVTable1BE, i64 0, i64 2), i8*** [[T0]]
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// CHECK-NEXT: ret void
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B::B() : A(foo()) {}
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// CHECK-LABEL: define void @_ZN10InitVTable1BC2Ei(%"struct.InitVTable::B"* %this, i32 %x) unnamed_addr
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// CHECK: [[ARG:%.*]] = add nsw i32 {{%.*}}, 5
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// CHECK-NEXT: call void @_ZN10InitVTable1AC2Ei({{.*}}* {{%.*}}, i32 [[ARG]])
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// CHECK-NEXT: [[T0:%.*]] = bitcast [[B]]* {{%.*}} to i8***
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// CHECK-NEXT: store i8** getelementptr inbounds ([3 x i8*]* @_ZTVN10InitVTable1BE, i64 0, i64 2), i8*** [[T0]]
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// CHECK-NEXT: ret void
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B::B(int x) : A(x + 5) {}
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}
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namespace rdar9694300 {
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struct X {
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int x;
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};
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// CHECK-LABEL: define void @_ZN11rdar96943001fEv
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void f() {
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// CHECK: alloca
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X x;
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// CHECK-NEXT: [[I:%.*]] = alloca i32
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// CHECK-NEXT: store i32 17, i32* [[I]]
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int i = 17;
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// CHECK-NEXT: ret void
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}
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}
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// Check that we emit a zero initialization step for list-value-initialization
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// which calls a trivial default constructor.
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namespace PR13273 {
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struct U {
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int t;
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U() = default;
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};
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struct S : U {
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S() = default;
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};
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// CHECK: define {{.*}}@_ZN7PR132731fEv(
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int f() {
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// CHECK-NOT: }
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// CHECK: llvm.memset{{.*}}i8 0
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return (new S{})->t;
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}
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}
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template<typename T>
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struct X {
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X(const X &);
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T *start;
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T *end;
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};
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template<typename T> struct X;
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// Make sure that the instantiated constructor initializes start and
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// end properly.
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// CHECK-LABEL: define linkonce_odr void @_ZN1XIiEC2ERKS0_(%struct.X* %this, %struct.X* dereferenceable({{[0-9]+}}) %other) unnamed_addr
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// CHECK: {{store.*null}}
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// CHECK: {{store.*null}}
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// CHECK: ret
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template<typename T>
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X<T>::X(const X &other) : start(0), end(0) { }
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X<int> get_X(X<int> x) { return x; }
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namespace PR10720 {
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struct X {
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X(const X&);
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X(X&&);
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X& operator=(const X&);
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X& operator=(X&&);
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~X();
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};
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struct pair2 {
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X second[4];
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// CHECK-PR10720: define linkonce_odr {{.*}} @_ZN7PR107205pair2aSERKS0_
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// CHECK-PR10720: load
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// CHECK-PR10720: icmp ne
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// CHECK-PR10720-NEXT: br i1
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// CHECK-PR10720: call {{.*}} @_ZN7PR107201XaSERKS0_
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// CHECK-PR10720: ret
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pair2 &operator=(const pair2&) = default;
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// CHECK-PR10720: define linkonce_odr {{.*}} @_ZN7PR107205pair2aSEOS0_
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// CHECK-PR10720: load
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// CHECK-PR10720: icmp ne
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// CHECK-PR10720-NEXT: br i1
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// CHECK-PR10720: call {{.*}} @_ZN7PR107201XaSEOS0_
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// CHECK-PR10720: ret
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pair2 &operator=(pair2&&) = default;
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// CHECK-PR10720-LABEL: define linkonce_odr void @_ZN7PR107205pair2C2EOS0_
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// CHECK-PR10720-NOT: ret
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// CHECK-PR10720: load
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// CHECK-PR10720: icmp ult
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// CHECK-PR10720-NEXT: br i1
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// CHECK-PR10720: call void @_ZN7PR107201XC1EOS0_
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// CHECK-PR10720-NEXT: br label
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// CHECK-PR10720: ret void
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pair2(pair2&&) = default;
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// CHECK-PR10720-LABEL: define linkonce_odr void @_ZN7PR107205pair2C2ERKS0_
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// CHECK-PR10720-NOT: ret
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// CHECK-PR10720: load
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// CHECK-PR10720: icmp ult
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// CHECK-PR10720-NEXT: br i1
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// CHECK-PR10720: call void @_ZN7PR107201XC1ERKS0_
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// CHECK-PR10720-NEXT: br label
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// CHECK-PR10720: ret void
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pair2(const pair2&) = default;
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};
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struct pair : X { // Make the copy constructor non-trivial, so we actually generate it.
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int second[4];
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// CHECK-PR10720-LABEL: define linkonce_odr void @_ZN7PR107204pairC2ERKS0_
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// CHECK-PR10720-NOT: ret
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// CHECK-PR10720: call void @llvm.memcpy
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// CHECK-PR10720-NEXT: ret void
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pair(const pair&) = default;
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};
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void foo(const pair &x, const pair2 &x2) {
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pair y(x);
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pair2 y2(x2);
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pair2 y2m(static_cast<pair2&&>(y2));
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y2 = x2;
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y2m = static_cast<pair2&&>(y2);
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}
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}
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