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188048610f
Summary: Reverse iteration can be turned on, by default, by setting -DLLVM_REVERSE_ITERATION:BOOL=ON during cmake. With this enabled, we can uncover lots of cases of non-determinism in codegen by simply running our tests (without any other change). We can then setup a buildbot which will have this turned on by default. Initially, a lot of unit tests will fail in this configuration. Once we start fixing non-determinism issues, we can gradually make this a blocker for patches. Reviewers: davide, dblaikie, mehdi_amini, dberlin Reviewed By: dblaikie Subscribers: probinson, mgorny, llvm-commits Differential Revision: https://reviews.llvm.org/D33908 llvm-svn: 304757
51 lines
2.1 KiB
CMake
51 lines
2.1 KiB
CMake
/*===------- llvm/Config/abi-breaking.h - llvm configuration -------*- C -*-===*/
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/* */
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/* The LLVM Compiler Infrastructure */
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/* */
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/* This file is distributed under the University of Illinois Open Source */
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/* License. See LICENSE.TXT for details. */
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/* */
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/*===----------------------------------------------------------------------===*/
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/* This file controls the C++ ABI break introduced in LLVM public header. */
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#ifndef LLVM_ABI_BREAKING_CHECKS_H
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#define LLVM_ABI_BREAKING_CHECKS_H
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/* Define to enable checks that alter the LLVM C++ ABI */
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#cmakedefine01 LLVM_ENABLE_ABI_BREAKING_CHECKS
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/* Define to enable reverse iteration of unordered llvm containers */
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#cmakedefine01 LLVM_ENABLE_REVERSE_ITERATION
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/* Allow selectively disabling link-time mismatch checking so that header-only
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ADT content from LLVM can be used without linking libSupport. */
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#if !LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING
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// ABI_BREAKING_CHECKS protection: provides link-time failure when clients build
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// mismatch with LLVM
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#if defined(_MSC_VER)
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// Use pragma with MSVC
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#define LLVM_XSTR(s) LLVM_STR(s)
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#define LLVM_STR(s) #s
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#pragma detect_mismatch("LLVM_ENABLE_ABI_BREAKING_CHECKS", LLVM_XSTR(LLVM_ENABLE_ABI_BREAKING_CHECKS))
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#undef LLVM_XSTR
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#undef LLVM_STR
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#elif defined(_WIN32) || defined(__CYGWIN__) // Win32 w/o #pragma detect_mismatch
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// FIXME: Implement checks without weak.
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#elif defined(__cplusplus)
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namespace llvm {
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#if LLVM_ENABLE_ABI_BREAKING_CHECKS
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extern int EnableABIBreakingChecks;
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__attribute__((weak, visibility ("hidden"))) int *VerifyEnableABIBreakingChecks = &EnableABIBreakingChecks;
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#else
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extern int DisableABIBreakingChecks;
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__attribute__((weak, visibility ("hidden"))) int *VerifyDisableABIBreakingChecks = &DisableABIBreakingChecks;
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#endif
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}
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#endif // _MSC_VER
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#endif // LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING
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#endif
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