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https://github.com/Gericom/teak-llvm.git
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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
96 lines
1.8 KiB
C++
96 lines
1.8 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm %s -o - | \
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// RUN: FileCheck %s
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// RUN: %clang_cc1 -triple i386-apple-darwin -std=c++11 -emit-llvm %s -o - | \
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// RUN: FileCheck %s
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extern "C" int printf(...);
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struct B {
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B() : B1(3.14), B2(3.15), auB2(3.16) {}
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float B1;
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float B2;
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void pr() {
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printf("B1 = %f B2 = %f auB1 = %f\n", B1, B2, auB1);
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}
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B& operator=(const B& arg) { B1 = arg.B1; B2 = arg.B2;
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auB1 = arg.auB1; return *this; }
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union {
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float auB1;
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float auB2;
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};
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};
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struct M {
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M() : M1(10), M2(11) , auM1(12) {}
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int M1;
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int M2;
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void pr() {
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printf("M1 = %d M2 = %d auM1 = %d auM2 = %d\n", M1, M2, auM1, auM2);
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}
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union {
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int auM1;
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int auM2;
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};
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};
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struct N : B {
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N() : N1(20), N2(21) {}
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int N1;
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int N2;
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void pr() {
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printf("N1 = %d N2 = %d\n", N1, N2);
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for (unsigned i = 0; i < 3; i++)
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for (unsigned j = 0; j < 2; j++)
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printf("arr_b[%d][%d] = %f\n", i,j,arr_b[i][j].B1);
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B::pr();
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}
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N& operator=(const N& arg) {
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N1 = arg.N1; N2 = arg.N2;
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for (unsigned i = 0; i < 3; i++)
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for (unsigned j = 0; j < 2; j++)
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arr_b[i][j] = arg.arr_b[i][j];
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return *this;
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}
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B arr_b[3][2];
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};
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struct Q : B {
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Q() : Q1(30), Q2(31) {}
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int Q1;
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int Q2;
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void pr() {
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printf("Q1 = %d Q2 = %d\n", Q1, Q2);
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}
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};
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struct X : M , N {
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X() : d(0.0), d1(1.1), d2(1.2), d3(1.3) {}
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double d;
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double d1;
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double d2;
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double d3;
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void pr() {
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printf("d = %f d1 = %f d2 = %f d3 = %f\n", d, d1,d2,d3);
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M::pr(); N::pr();
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q1.pr(); q2.pr();
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}
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Q q1, q2;
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};
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X srcX;
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X dstX;
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X dstY;
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int main() {
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dstY = dstX = srcX;
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srcX.pr();
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dstX.pr();
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dstY.pr();
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}
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// CHECK: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.X* @_ZN1XaSERKS_
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