Valgrind gives ==5554== vex amd64->IR: unhandled instruction bytes: 0xC4 0xE1 0xFA 0x2A 0x7 0x48 0x83 0xC4 objdump -d gives 41fec0: c4 e1 fa 2a 07 vcvtsi2ssq (%rdi),%xmm0,%xmm0 Reproducible: Always Steps to Reproduce: To reproduce, I compile my program with g++ -O3
Please try with svn - that is an AVX instruction so will not be supported in 3.7.0 but probably is in the svn code.
Thank you. The error does not appear under valgrind-3.8.0.SVN.
*** This bug has been marked as a duplicate of bug 273475 ***