Regressions on master at commit r16-7432 vs commit r16-7428 on Linux/x86_64

[Haochen Jiang]

Regressions on master at commit r16-7432 vs commit r16-7428 on Linux/x86_64
New failures:
FAIL: gcc.dg/guality/pr54693-2.c   -O2  -DPREVENT_OPTIMIZATION  line 21 x == 10 - i
FAIL: gcc.dg/guality/pr54693-2.c   -O2  -DPREVENT_OPTIMIZATION  line 21 x == 10 - i
FAIL: gcc.dg/guality/pr54693-2.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  -DPREVENT_OPTIMIZATION line 21 x == 10 - i
FAIL: gcc.dg/guality/pr54693-2.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  -DPREVENT_OPTIMIZATION line 21 x == 10 - i
FAIL: gcc.dg/guality/pr54693-2.c   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  -DPREVENT_OPTIMIZATION  line 21 x == 10 - i
FAIL: gcc.dg/guality/pr54693-2.c   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  -DPREVENT_OPTIMIZATION  line 21 x == 10 - i
FAIL: gcc.dg/guality/pr54693-2.c   -O3 -g  -DPREVENT_OPTIMIZATION  line 21 x == 10 - i
FAIL: gcc.dg/guality/pr54693-2.c   -O3 -g  -DPREVENT_OPTIMIZATION  line 21 x == 10 - i

New passes: