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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
44 lines
1.6 KiB
C++
44 lines
1.6 KiB
C++
// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -fcxx-exceptions -fexceptions -emit-llvm -o - | FileCheck %s
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// Reduced from a crash on boost::interprocess's node_allocator_test.cpp.
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namespace test0 {
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struct A { A(); ~A(); };
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struct V { V(const A &a = A()); ~V(); };
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// CHECK-LABEL: define linkonce_odr i32 @_ZN5test04testILi0EEEii
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template<int X> int test(int x) {
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// CHECK: [[RET:%.*]] = alloca i32
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// CHECK-NEXT: [[X:%.*]] = alloca i32
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// CHECK-NEXT: [[Y:%.*]] = alloca [[A:%.*]],
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// CHECK-NEXT: [[Z:%.*]] = alloca [[A]]
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// CHECK-NEXT: [[EXN:%.*]] = alloca i8*
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// CHECK-NEXT: [[SEL:%.*]] = alloca i32
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// CHECK-NEXT: [[V:%.*]] = alloca [[V:%.*]]*,
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// CHECK-NEXT: [[TMP:%.*]] = alloca [[A]]
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// CHECK-NEXT: [[CLEANUPACTIVE:%.*]] = alloca i1
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// CHECK: call void @_ZN5test01AC1Ev([[A]]* [[Y]])
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// CHECK-NEXT: invoke void @_ZN5test01AC1Ev([[A]]* [[Z]])
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// CHECK: [[NEW:%.*]] = invoke noalias i8* @_Znwm(i64 1)
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// CHECK: store i1 true, i1* [[CLEANUPACTIVE]]
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// CHECK: [[NEWCAST:%.*]] = bitcast i8* [[NEW]] to [[V]]*
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// CHECK-NEXT: invoke void @_ZN5test01AC1Ev([[A]]* [[TMP]])
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// CHECK: invoke void @_ZN5test01VC1ERKNS_1AE([[V]]* [[NEWCAST]], [[A]]* dereferenceable({{[0-9]+}}) [[TMP]])
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// CHECK: store i1 false, i1* [[CLEANUPACTIVE]]
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// CHECK-NEXT: invoke void @_ZN5test01AD1Ev([[A]]* [[TMP]])
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A y;
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try {
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A z;
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V *v = new V();
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if (x) return 1;
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} catch (int ex) {
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return 1;
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}
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return 0;
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}
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int test() {
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return test<0>(5);
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}
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}
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