7a85aa918c
This follows 2b4fa53 which made Clang not emit destructor calls for such
objects. However, they would still not get emitted as constants since
CodeGenModule::isTypeConstant() returns false if the destructor is
constexpr. This change adds a param to make isTypeConstant() ignore the
dtor, allowing the caller to check it instead.
Fixes Issue #61212
Differential revision: https://reviews.llvm.org/D145369
74 lines
1.9 KiB
C++
74 lines
1.9 KiB
C++
// RUN: %clang_cc1 -triple i686-linux-gnu -std=c++20 -emit-llvm %s -disable-llvm-passes -o - | FileCheck %s --check-prefix=CHECK-O0
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// RUN: %clang_cc1 -triple i686-linux-gnu -std=c++20 -emit-llvm %s -O1 -disable-llvm-passes -o - | FileCheck %s
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// Check that we add an llvm.invariant.start.p0i8 to mark when a global becomes
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// read-only. If globalopt can fold the initializer, it will then mark the
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// variable as constant.
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// Do not produce markers at -O0.
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// CHECK-O0-NOT: llvm.invariant.start.p0i8
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struct A {
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A();
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int n;
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};
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// CHECK: @a ={{.*}} global {{.*}} zeroinitializer
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extern const A a = A();
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struct A2 {
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A2();
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constexpr ~A2() {}
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int n;
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};
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// CHECK: @a2 ={{.*}} global {{.*}} zeroinitializer
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extern const A2 a2 = A2();
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struct B {
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B();
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mutable int n;
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};
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// CHECK: @b ={{.*}} global {{.*}} zeroinitializer
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extern const B b = B();
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struct C {
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C();
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~C();
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int n;
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};
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// CHECK: @c ={{.*}} global {{.*}} zeroinitializer
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extern const C c = C();
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int f();
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// CHECK: @d ={{.*}} global i32 0
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extern const int d = f();
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void e() {
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static const A a = A();
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}
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// CHECK: call void @_ZN1AC1Ev(ptr noundef {{[^,]*}} @a)
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// CHECK: call {{.*}}@llvm.invariant.start.p0(i64 4, ptr @a)
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// CHECK: call void @_ZN2A2C1Ev(ptr noundef {{[^,]*}} @a2)
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// CHECK: call {{.*}}@llvm.invariant.start.p0(i64 4, ptr @a2)
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// CHECK: call void @_ZN1BC1Ev(ptr noundef {{[^,]*}} @b)
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// CHECK-NOT: call {{.*}}@llvm.invariant.start.p0(i64 noundef 4, ptr @b)
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// CHECK: call void @_ZN1CC1Ev(ptr noundef {{[^,]*}} @c)
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// CHECK-NOT: call {{.*}}@llvm.invariant.start.p0(i64 noundef 4, ptr @c)
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// CHECK: call noundef i32 @_Z1fv(
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// CHECK: store {{.*}}, ptr @d
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// CHECK: call {{.*}}@llvm.invariant.start.p0(i64 4, ptr @d)
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// CHECK-LABEL: define{{.*}} void @_Z1ev(
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// CHECK: call void @_ZN1AC1Ev(ptr noundef {{[^,]*}} @_ZZ1evE1a)
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// CHECK: call {{.*}}@llvm.invariant.start.p0(i64 4, ptr {{.*}}@_ZZ1evE1a)
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// CHECK-NOT: llvm.invariant.end
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