Regressions on trunk at revision 240602 vs revision 240579

[H.J. Lu ia32 -fpic]

New failures:
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-1.c  (test for warnings, line 1229)
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-1.c  (test for warnings, line 1279)
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-1.c  (test for warnings, line 1390)

New passes:
FAIL: g++.dg/ext/builtin10.C  -std=gnu++11  scan-tree-dump-not optimized "strchr"
FAIL: g++.dg/ext/builtin10.C  -std=gnu++14  scan-tree-dump-not optimized "strchr"
FAIL: g++.dg/ext/builtin10.C  -std=gnu++98  scan-tree-dump-not optimized "strchr"
FAIL: gcc.c-torture/execute/builtins/strchr.c execution,  -O1 
FAIL: gcc.c-torture/execute/builtins/strchr.c execution,  -O2 
FAIL: gcc.c-torture/execute/builtins/strchr.c execution,  -O2 -flto -fno-use-linker-plugin -flto-partition=none 
FAIL: gcc.c-torture/execute/builtins/strchr.c execution,  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects 
FAIL: gcc.c-torture/execute/builtins/strchr.c execution,  -O3 -g 
FAIL: gcc.c-torture/execute/builtins/strchr.c execution,  -Og -g 
FAIL: gcc.c-torture/execute/builtins/strchr.c execution,  -Os 
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-1.c  (test for warnings, line 1223)
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-1.c  (test for warnings, line 1273)
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-1.c  (test for warnings, line 1384)
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-1.c (nil) (test for warnings, line 96)
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-1.c Glibc %p (test for warnings, line 108)