https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86632
--- Comment #3 from Ketan <ketan.surender at gmail dot com> --- Example execution output: Compile and run with -O1 Out14[0] = 0.000000 Out14[1] = 0.000000 Out14[2] = 0.000000 Out14[3] = 0.000000 Out14[4] = 0.000000 Out14[5] = 0.000000 Out15[0] = 75.000000 Out15[1] = 75.000000 Out15[2] = 75.000000 Compile and run with -O3 Out14[0] = 0.000000 Out14[1] = 0.000000 Out14[2] = 75.000000 Out14[3] = 0.000000 Out14[4] = 0.000000 Out14[5] = 0.000000 Out15[0] = 75.000000 Out15[1] = 75.000000 Out15[2] = 75.000000 Compile and run with -O3 -fno-tree-loop-vectorize Out14[0] = 0.000000 Out14[1] = 0.000000 Out14[2] = 0.000000 Out14[3] = 0.000000 Out14[4] = 0.000000 Out14[5] = 0.000000 Out15[0] = 75.000000 Out15[1] = 75.000000 Out15[2] = 75.000000