Regressions on native/master at commit r12-674 vs commit r12-633 on Linux/x86_64

[H. J. Lu]

New failures:

New passes:
FAIL: gcc.dg/sso-9.c  (test for errors, line 25)
FAIL: g++.dg/debug/dwarf2/thunk1.C  -std=gnu++14  scan-assembler-times LFB3 5
FAIL: g++.dg/debug/dwarf2/thunk1.C  -std=gnu++17  scan-assembler-times LFB3 5
FAIL: g++.dg/debug/dwarf2/thunk1.C  -std=gnu++2a  scan-assembler-times LFB3 5
FAIL: g++.dg/debug/dwarf2/thunk1.C  -std=gnu++98  scan-assembler-times LFB3 5