mirror of
https://github.com/Gericom/teak-llvm.git
synced 2025-06-23 21:45:46 -04:00
f55ce36c02
Summary: Per https://wg21.link/CWG1677, the C++11 standard did not clarify that constant initialization of an object allowed constexpr brace-or-equal initialization of subobjects: struct foo_t { union { int i; volatile int j; } u; }; __attribute__((__require_constant_initialization__)) static const foo_t x = {{0}}; Because foo_t::u has a volatile member, the initializer for x fails. However, there is really no good reason, because this: union foo_u { int i; volatile int j; }; __attribute__((__require_constant_initialization__)) static const foo_u x = {0}; does have a constant initializer. (This was triggered by musl's pthread_mutex_t type when building under C++11.) Reviewers: rsmith Subscribers: EricWF, cfe-commits Differential Revision: https://reviews.llvm.org/D28427 llvm-svn: 291480
63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm %s -o - | FileCheck %s
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extern "C" int printf(...);
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int count;
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struct S {
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S() : iS(++count) { printf("S::S(%d)\n", iS); }
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~S() { printf("S::~S(%d)\n", iS); }
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int iS;
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};
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S arr[2][1];
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S s1;
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S arr1[3];
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static S sarr[4];
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int main () {}
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S arr2[2];
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static S sarr1[4];
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S s2;
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S arr3[3];
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// CHECK: call {{.*}} @__cxa_atexit
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// CHECK: call {{.*}} @__cxa_atexit
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// CHECK: call {{.*}} @__cxa_atexit
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// CHECK: call {{.*}} @__cxa_atexit
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// CHECK: call {{.*}} @__cxa_atexit
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// CHECK: call {{.*}} @__cxa_atexit
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// CHECK: call {{.*}} @__cxa_atexit
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// CHECK: call {{.*}} @__cxa_atexit
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struct T {
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double d;
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int n;
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~T();
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};
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T t[2][3] = { 1.0, 2, 3.0, 4, 5.0, 6, 7.0, 8, 9.0, 10, 11.0, 12 };
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// CHECK: call {{.*}} @__cxa_atexit
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// CHECK: getelementptr inbounds ({{.*}} getelementptr inbounds ([2 x [3 x {{.*}}]], [2 x [3 x {{.*}}]]* @t, i32 0, i32 0, i32 0), i64 6)
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// CHECK: call void @_ZN1TD1Ev
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// CHECK: icmp eq {{.*}} @t
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// CHECK: br i1 {{.*}}
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static T t2[2][3] = { 1.0, 2, 3.0, 4, 5.0, 6, 7.0, 8, 9.0, 10, 11.0, 12 };
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// CHECK: call {{.*}} @__cxa_atexit
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// CHECK: getelementptr inbounds ({{.*}} getelementptr inbounds ([2 x [3 x {{.*}}]], [2 x [3 x {{.*}}]]* @_ZL2t2, i32 0, i32 0, i32 0), i64 6)
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// CHECK: call void @_ZN1TD1Ev
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// CHECK: icmp eq {{.*}} @_ZL2t2
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// CHECK: br i1 {{.*}}
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using U = T[2][3];
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U &&u = U{ {{1.0, 2}, {3.0, 4}, {5.0, 6}}, {{7.0, 8}, {9.0, 10}, {11.0, 12}} };
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// CHECK: call {{.*}} @__cxa_atexit
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// CHECK: getelementptr inbounds ({{.*}}* getelementptr inbounds ([2 x [3 x {{.*}}]], [2 x [3 x {{.*}}]]* @_ZGR1u_, i32 0, i32 0, i32 0), i64 6)
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// CHECK: call void @_ZN1TD1Ev
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// CHECK: icmp eq {{.*}} @_ZGR1u_
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// CHECK: br i1 {{.*}}
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