Regressions on trunk at revision 193139 vs revision 193137

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

New failures:
FAIL: gcc.dg/guality/pr54693.c  -O1  line 22 i == c - 48

New passes:
FAIL: gcc.dg/guality/pr43051-1.c  -O2  line 34 c == &a[0]
FAIL: gcc.dg/guality/pr43051-1.c  -O2  line 39 c == &a[0]
FAIL: gcc.dg/guality/pr43051-1.c  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  line 34 c == &a[0]
FAIL: gcc.dg/guality/pr43051-1.c  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  line 39 c == &a[0]
FAIL: gcc.dg/guality/pr43051-1.c  -O3 -fomit-frame-pointer  line 34 c == &a[0]
FAIL: gcc.dg/guality/pr43051-1.c  -O3 -fomit-frame-pointer  line 39 c == &a[0]
FAIL: gcc.dg/guality/pr43051-1.c  -O3 -g  line 34 c == &a[0]
FAIL: gcc.dg/guality/pr43051-1.c  -O3 -g  line 39 c == &a[0]