Regressions on trunk at revision 251025 vs revision 251019

[Intel Automatic Testing System [ia32 Core AVX2 PIC]]

New failures:

New passes:
FAIL: gcc.dg/compare2.c case 20 (test for warnings, line 49)
FAIL: gcc.dg/compare2.c case 24 (test for warnings, line 57)
FAIL: gcc.dg/compare2.c (test for excess errors)
FAIL: objc.dg/proto-lossage-4.m -fgnu-runtime (test for excess errors)
FAIL: objc.dg/proto-lossage-4.m -fgnu-runtime  (test for warnings, line 30)
FAIL: objc.dg/proto-lossage-4.m -fgnu-runtime  (test for warnings, line 36)
FAIL: objc.dg/proto-lossage-4.m -fgnu-runtime  (test for warnings, line 44)