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5b57167285
we were failing to find that bit-field when performing integer promotions. This brings us closer to following the standard, and closer to GCC. In C, this change is technically a regression: we get bit-field promotions completely wrong in C, promoting cases that are categorically not bit-field designators. This change makes us do so slightly more consistently, though. llvm-svn: 218428
33 lines
1.2 KiB
C++
33 lines
1.2 KiB
C++
// RUN: %clang_cc1 %s -verify
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// expected-no-diagnostics
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namespace PromotionVersusMutation {
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typedef unsigned Unsigned;
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typedef signed Signed;
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struct T { unsigned n : 2; } t;
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typedef __typeof__(t.n) Unsigned; // Bitfield is unsigned
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typedef __typeof__(+t.n) Signed; // ... but promotes to signed.
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typedef __typeof__(t.n + 0) Signed; // Arithmetic promotes.
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typedef __typeof__(t.n = 0) Unsigned; // Assignment produces an lvalue...
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typedef __typeof__(t.n += 0) Unsigned;
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typedef __typeof__(t.n *= 0) Unsigned;
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typedef __typeof__(+(t.n = 0)) Signed; // ... which is a bit-field.
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typedef __typeof__(+(t.n += 0)) Signed;
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typedef __typeof__(+(t.n *= 0)) Signed;
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typedef __typeof__(++t.n) Unsigned; // Increment is equivalent to compound-assignment.
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typedef __typeof__(--t.n) Unsigned;
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typedef __typeof__(+(++t.n)) Signed;
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typedef __typeof__(+(--t.n)) Signed;
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typedef __typeof__(t.n++) Unsigned; // Post-increment's result has the type
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typedef __typeof__(t.n--) Unsigned; // of the operand...
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typedef __typeof__(+(t.n++)) Unsigned; // ... and is not a bit-field (because
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typedef __typeof__(+(t.n--)) Unsigned; // it's not a glvalue).
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}
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