a6339d0e58
When declaring multiple arrays of 1 ExaByte in a struct, the offset can exceed 2EB, causing incorrect struct size reporting (only 1EB). This fix ensures an error is thrown, preventing the generation of incorrect assembly. #60272
23 lines
757 B
C
23 lines
757 B
C
// RUN: %clang_cc1 -fsyntax-only -verify %s -triple x86_64-linux-gnu
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// PR15216
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// Don't crash when taking computing the offset of structs with large arrays.
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const unsigned long Size = (1l << 58);
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struct Chunk1 {
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char padding[Size]; // expected-warning {{folded to constant}}
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char more_padding[1][Size]; // expected-warning {{folded to constant}}
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char data;
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};
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unsigned long test1 = __builtin_offsetof(struct Chunk1, data);
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struct Chunk2 {
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char padding[Size][Size][Size]; // expected-error {{array is too large}}
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char data;
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};
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// FIXME: Remove this error when the constant evaluator learns to
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// ignore bad types.
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int test2 = __builtin_offsetof(struct Chunk2, data); // expected-error{{initializer element is not a compile-time constant}}
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