Regressions on trunk at revision 154174 vs revision 154172

[H.J. Lu ia32]

New failures:

New passes:
FAIL: objc.dg/const-str-12.m (internal compiler error)
FAIL: objc.dg/const-str-12.m (test for excess errors)
FAIL: objc.dg/const-str-5.m (internal compiler error)
FAIL: objc.dg/const-str-5.m (test for excess errors)
FAIL: objc.dg/gnu-runtime-2.m (internal compiler error)
FAIL: objc.dg/gnu-runtime-2.m (test for excess errors)
FAIL: objc/execute/string1.m compilation,  -O0 -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string1.m compilation,  -O1 -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string1.m compilation,  -O2 -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string1.m compilation,  -O3 -fomit-frame-pointer -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string1.m compilation,  -O3 -g -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string1.m compilation,  -Os -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string2.m compilation,  -O0 -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string2.m compilation,  -O1 -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string2.m compilation,  -O2 -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string2.m compilation,  -O3 -fomit-frame-pointer -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string2.m compilation,  -O3 -g -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string2.m compilation,  -Os -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string3.m compilation,  -O0 -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string3.m compilation,  -O1 -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string3.m compilation,  -O2 -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string3.m compilation,  -O3 -fomit-frame-pointer -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string3.m compilation,  -O3 -g -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string3.m compilation,  -Os -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string4.m compilation,  -O0 -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string4.m compilation,  -O1 -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string4.m compilation,  -O2 -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string4.m compilation,  -O3 -fomit-frame-pointer -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string4.m compilation,  -O3 -g -fgnu-runtime (internal compiler error)
FAIL: objc/execute/string4.m compilation,  -Os -fgnu-runtime (internal compiler error)