mirror of
https://github.com/capstone-engine/llvm-capstone.git
synced 2025-01-15 12:39:19 +00:00
ead98ea3eb
Respect C++17 copy elision; previously it would generate destructor calls for elided temporaries, including in initialization and return statements. Don't generate duplicate destructor calls for statement expressions. Fix destructors in initialization lists and comma operators. Improve printing of implicit destructors. Patch by Nicholas Allegra! Differential Revision: https://reviews.llvm.org/D66404 llvm-svn: 370247
131 lines
3.8 KiB
C++
131 lines
3.8 KiB
C++
// RUN: %clang_analyze_cc1 -triple x86_64-unknown-linux -analyzer-checker=debug.DumpCFG -std=c++14 -analyzer-config eagerly-assume=false %s > %t 2>&1
|
|
// RUN: FileCheck --input-file=%t %s
|
|
// RUN: %clang_analyze_cc1 -triple x86_64-unknown-linux -analyzer-checker=core,debug.ExprInspection -std=c++14 -verify -analyzer-config eagerly-assume=false %s
|
|
|
|
void clang_analyzer_eval(bool);
|
|
|
|
int global;
|
|
|
|
namespace variant_0 {
|
|
// This variant of the code works correctly. Function foo() is not a template
|
|
// function. Note that there are two destructors within foo().
|
|
|
|
class A {
|
|
public:
|
|
~A() { ++global; }
|
|
};
|
|
|
|
class B {
|
|
A a;
|
|
};
|
|
|
|
// CHECK: void foo(int)
|
|
// CHECK: [B1]
|
|
// CHECK-NEXT: 1: (CXXConstructExpr, [B1.2], class variant_0::B)
|
|
// CHECK-NEXT: 2: variant_0::B i;
|
|
// CHECK-NEXT: 3: operator=
|
|
// CHECK-NEXT: 4: [B1.3] (ImplicitCastExpr, FunctionToPointerDecay, class variant_0::B &(*)(class variant_0::B &&) noexcept)
|
|
// CHECK-NEXT: 5: i
|
|
// CHECK-NEXT: 6: {} (CXXConstructExpr, [B1.7], [B1.8], class variant_0::B)
|
|
// CHECK-NEXT: 7: [B1.6] (BindTemporary)
|
|
// CHECK-NEXT: 8: [B1.7]
|
|
// CHECK-NEXT: 9: [B1.5] = [B1.8] (OperatorCall)
|
|
// CHECK-NEXT: 10: ~variant_0::B() (Temporary object destructor)
|
|
// CHECK-NEXT: 11: [B1.2].~variant_0::B() (Implicit destructor)
|
|
void foo(int) {
|
|
B i;
|
|
i = {};
|
|
}
|
|
|
|
void bar() {
|
|
global = 0;
|
|
foo(1);
|
|
clang_analyzer_eval(global == 2); // expected-warning{{TRUE}}
|
|
}
|
|
|
|
} // end namespace variant_0
|
|
|
|
namespace variant_1 {
|
|
// Suddenly, if we turn foo() into a template, we are missing a
|
|
// CXXBindTemporaryExpr in the AST, and therefore we're missing a
|
|
// temporary destructor in the CFG.
|
|
|
|
class A {
|
|
public:
|
|
~A() { ++global; }
|
|
};
|
|
|
|
class B {
|
|
A a;
|
|
};
|
|
|
|
// FIXME: Find the construction context for {} and enforce the temporary
|
|
// destructor.
|
|
// CHECK: template<> void foo<int>(int)
|
|
// CHECK: [B1]
|
|
// CHECK-NEXT: 1: (CXXConstructExpr, [B1.2], class variant_1::B)
|
|
// CHECK-NEXT: 2: variant_1::B i;
|
|
// CHECK-NEXT: 3: operator=
|
|
// CHECK-NEXT: 4: [B1.3] (ImplicitCastExpr, FunctionToPointerDecay, class variant_1::B &(*)(class variant_1::B &&) noexcept)
|
|
// CHECK-NEXT: 5: i
|
|
// CHECK-NEXT: 6: {} (CXXConstructExpr, class variant_1::B)
|
|
// CHECK-NEXT: 7: [B1.6]
|
|
// CHECK-NEXT: 8: [B1.5] = [B1.7] (OperatorCall)
|
|
// CHECK-NEXT: 9: [B1.2].~variant_1::B() (Implicit destructor)
|
|
template <typename T> void foo(T) {
|
|
B i;
|
|
i = {};
|
|
}
|
|
|
|
void bar() {
|
|
global = 0;
|
|
foo(1);
|
|
// FIXME: Should be TRUE, i.e. we should call (and inline) two destructors.
|
|
clang_analyzer_eval(global == 2); // expected-warning{{UNKNOWN}}
|
|
}
|
|
|
|
} // end namespace variant_1
|
|
|
|
namespace variant_2 {
|
|
// Making field 'a' in class 'B' public turns the class into an aggregate.
|
|
// In this case there is no constructor at {} - only an aggregate
|
|
// initialization. Aggregate initialization is unsupported for now.
|
|
|
|
class A {
|
|
public:
|
|
~A() { ++global; }
|
|
};
|
|
|
|
class B {
|
|
public:
|
|
A a;
|
|
};
|
|
|
|
// CHECK: template<> void foo<int>(int)
|
|
// CHECK: [B1]
|
|
// CHECK-NEXT: 1: (CXXConstructExpr, [B1.2], class variant_2::B)
|
|
// CHECK-NEXT: 2: variant_2::B i;
|
|
// CHECK-NEXT: 3: operator=
|
|
// CHECK-NEXT: 4: [B1.3] (ImplicitCastExpr, FunctionToPointerDecay, class variant_2::B &(*)(class variant_2::B &&) noexcept)
|
|
// CHECK-NEXT: 5: i
|
|
// CHECK-NEXT: 6: {}
|
|
// CHECK-NEXT: 7: {}
|
|
// CHECK-NEXT: 8: [B1.7] (BindTemporary)
|
|
// CHECK-NEXT: 9: [B1.8]
|
|
// CHECK-NEXT: 10: [B1.5] = [B1.9] (OperatorCall)
|
|
// CHECK-NEXT: 11: ~variant_2::B() (Temporary object destructor)
|
|
// CHECK-NEXT: 12: [B1.2].~variant_2::B() (Implicit destructor)
|
|
template <typename T> void foo(T) {
|
|
B i;
|
|
i = {};
|
|
}
|
|
|
|
void bar() {
|
|
global = 0;
|
|
foo(1);
|
|
// FIXME: Should be TRUE, i.e. we should call (and inline) two destructors.
|
|
clang_analyzer_eval(global == 2); // expected-warning{{UNKNOWN}}
|
|
}
|
|
|
|
} // end namespace variant_2
|