a61b202d4e
Previous warning went on whenever a struct with a struct member with alignment => 16 was declared. This led to too many false positives and led to diagnostic lit failures due to it being emitted too frequently. Only emit the warning when such a struct and that struct contains a member that has an alignment of 16 bytes is passed to a caller function since this is where the potential binary compatibility issue with XL 16.1.0 and older exists. Reviewed By: sfertile, aaron.ballman Differential Revision: https://reviews.llvm.org/D118350
37 lines
820 B
C++
37 lines
820 B
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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// expected-no-diagnostics
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template <typename T>
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struct A {
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char a __attribute__((aligned(16)));
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struct B {
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typedef T __attribute__((aligned(16))) i16;
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i16 x;
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};
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};
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int a[sizeof(A<int>) == 16 ? 1 : -1];
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int a2[sizeof(A<int>::B) == 16 ? 1 : -1];
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// rdar://problem/8243419
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namespace test1 {
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template <typename T> struct A {
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int a;
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T b[0];
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} __attribute__((packed));
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typedef A<unsigned long> type;
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int test0[sizeof(type) == 4 ? 1 : -1];
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int test1[__builtin_offsetof(type, a) == 0 ? 1 : -1];
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int test2[__builtin_offsetof(type, b) == 4 ? 1 : -1];
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}
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namespace test2 {
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template <class type>
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struct fastscriptmember {
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type Member __attribute__ ((packed));
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char x;
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};
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int test0[sizeof(fastscriptmember<int>) == 5 ? 1 : -1];
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}
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