Regressions on trunk at revision 189081 vs revision 189080

[H.J. Lu ia32 Core 2/i7]

New failures:
FAIL: gcc.c-torture/execute/pr53645.c execution,  -O1 
FAIL: gcc.c-torture/execute/pr53645.c execution,  -O2 
FAIL: gcc.c-torture/execute/pr53645.c execution,  -O2 -flto -fno-use-linker-plugin -flto-partition=none 
FAIL: gcc.c-torture/execute/pr53645.c execution,  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects 
FAIL: gcc.c-torture/execute/pr53645.c execution,  -O3 -fomit-frame-pointer 
FAIL: gcc.c-torture/execute/pr53645.c execution,  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions 
FAIL: gcc.c-torture/execute/pr53645.c execution,  -O3 -fomit-frame-pointer -funroll-loops 
FAIL: gcc.c-torture/execute/pr53645.c execution,  -O3 -g 
FAIL: gcc.c-torture/execute/pr53645.c execution,  -Os 

New passes: