Regressions on trunk at revision 266769 vs revision 266734

[H.J. Lu (ia32)]

New failures:
FAIL: gcc.dg/dfp/fe-binop.c execution test
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-18.c second (test for warnings, line 120)
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-18.c second (test for warnings, line 122)

New passes:
FAIL: gcc.c-torture/execute/pr64242.c   -O0  execution test
FAIL: gcc.c-torture/execute/pr64242.c   -O1  execution test
FAIL: gcc.c-torture/execute/pr64242.c   -O2  execution test
FAIL: gcc.c-torture/execute/pr64242.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: gcc.c-torture/execute/pr64242.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.c-torture/execute/pr64242.c   -O3 -g  execution test
FAIL: gcc.c-torture/execute/pr64242.c   -Os  execution test
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-18.c  (test for warnings, line 120)
FAIL: gcc.dg/tree-ssa/builtin-sprintf-warn-18.c  (test for warnings, line 122)
FAIL: g++.dg/cpp1y/lambda-generic-83856.C  -std=c++14 (test for excess errors)
FAIL: g++.dg/cpp1y/lambda-generic-83856.C  -std=c++17 (test for excess errors)