Regressions on trunk at revision 198603 vs revision 198598

[Kirill Yukhin [Intel64 Core AVX-i]]

New failures:

New passes:
FAIL: gcc.dg/guality/pr54519-5.c  -O2  line 17 y == 25
FAIL: gcc.dg/guality/pr54519-5.c  -O3 -fomit-frame-pointer  line 17 y == 25
FAIL: gcc.dg/guality/pr54519-5.c  -O3 -g  line 17 y == 25
FAIL: gcc.dg/guality/pr54519-5.c  -Os  line 17 y == 25