http://bugzilla.opensuse.org/show_bug.cgi?id=1043966 Bug ID: 1043966 Summary: g++ 7.1.1 segfaults on gtest of boost::uuid Classification: openSUSE Product: openSUSE Tumbleweed Version: Current Hardware: x86-64 OS: Other Status: NEW Severity: Normal Priority: P5 - None Component: Development Assignee: bnc-team-screening@forge.provo.novell.com Reporter: andreas_nordal_4@hotmail.com QA Contact: qa-bugs@suse.de Found By: --- Blocker: --- g++ 7.1.1 crashes on this code when compiled with -O2 on x86_64:

#include #include

void crash_gcc7() { static const boost::uuids::uuid u = boost::uuids::uuid(); EXPECT_EQ(u, u); }

This was reduced from a large unittest at work. Further reduced by inlining gtest & boost headers:

class AssertionResult { bool success_; };

AssertionResult AssertionSuccess();

template <typename T1> AssertionResult EXPECT_EQ(const T1& expected, const T1& actual) { if (expected == actual) { return AssertionSuccess(); } return AssertionSuccess(); }

struct uuid { // or should it be array unsigned char data[16]; };

bool operator== (uuid const& lhs, uuid const& rhs);

#include

__m128i load_unaligned_si128(const unsigned char* p) { return _mm_loadu_si128(reinterpret_cast< const __m128i* >(p)); }

inline bool operator== (uuid const& lhs, uuid const& rhs) { __m128i mm_left = load_unaligned_si128(lhs.data); __m128i mm_right = load_unaligned_si128(rhs.data);

__m128i mm_cmp = _mm_cmpeq_epi32(mm_left, mm_right);

return _mm_movemask_epi8(mm_cmp) == 0xFFFF; }

void crash_gcc7() { static const uuid u = uuid(); EXPECT_EQ(u, u); }

Note1: The boost implementation had an SSE2 optimized version and a generic version. The generic version does NOT crash g++. Note2: emmintrin.h seems to be a GCC header: /usr/lib64/gcc/x86_64-suse-linux/7/include/emmintrin.h -- You are receiving this mail because: You are on the CC list for the bug.