Regressions on master at commit r14-4163 vs commit r14-4120 on Linux/i686

[H.J. Lu]

New failures:

New passes:
FAIL: c-c++-common/analyzer/compound-assignment-1.c  -std=c++14 (test for excess errors)
FAIL: c-c++-common/analyzer/compound-assignment-1.c  -std=c++14  (test for warnings, line 72)
FAIL: c-c++-common/analyzer/compound-assignment-1.c  -std=c++17 (test for excess errors)
FAIL: c-c++-common/analyzer/compound-assignment-1.c  -std=c++17  (test for warnings, line 72)
FAIL: c-c++-common/analyzer/compound-assignment-1.c  -std=c++20 (test for excess errors)
FAIL: c-c++-common/analyzer/compound-assignment-1.c  -std=c++20  (test for warnings, line 72)
FAIL: c-c++-common/analyzer/compound-assignment-1.c  -std=c++98 (test for excess errors)
FAIL: c-c++-common/analyzer/compound-assignment-1.c  -std=c++98  (test for warnings, line 72)