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e5015abf18
Libc++ needs to know when aligned allocation is supported by clang, but is otherwise unavailable at link time. Otherwise, libc++ will incorrectly end up generating calls to `__builtin_operator_new`/`__builtin_operator_delete` with alignment arguments. This patch implements the following changes: * The `__cpp_aligned_new` feature test macro to no longer be defined when aligned allocation is otherwise enabled but unavailable. * The Darwin driver no longer passes `-faligned-alloc-unavailable` when the user manually specifies `-faligned-allocation` or `-fno-aligned-allocation`. * Instead of a warning Clang now generates a hard error when an aligned allocation or deallocation function is referenced but unavailable. Patch by Eric Fiselier. Reviewers: rsmith, vsapsai, erik.pilkington, ahatanak, dexonsmith Reviewed By: rsmith Subscribers: Quuxplusone, cfe-commits Differential Revision: https://reviews.llvm.org/D45015 llvm-svn: 338934
24 lines
807 B
C++
24 lines
807 B
C++
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.12.0 -fexceptions -std=c++17 -verify %s \
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// RUN: -DEXPECT_DEFINED
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//
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// RUN: %clang_cc1 -triple x86_64-apple-macosx10.12.0 -fexceptions -std=c++17 -verify %s \
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// RUN: -faligned-alloc-unavailable
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//
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// RUN: %clang_cc1 -triple x86_64-apple-macosx10.12.0 -fexceptions -std=c++17 -verify %s \
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// RUN: -faligned-allocation -faligned-alloc-unavailable
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// Test that __cpp_aligned_new is not defined when CC1 is passed
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// -faligned-alloc-unavailable by the Darwin driver, even when aligned
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// allocation is actually enabled.
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// expected-no-diagnostics
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#ifdef EXPECT_DEFINED
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# ifndef __cpp_aligned_new
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# error "__cpp_aligned_new" should be defined
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# endif
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#else
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# ifdef __cpp_aligned_new
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# error "__cpp_aligned_new" should not be defined
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# endif
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#endif
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