Regressions on trunk at revision 229911 vs revision 229845

[H.J. Lu Intel64 Core i7]

New failures:
FAIL: boehm-gc.c/gctest.c -O2 execution test
FAIL: gcc.dg/graphite/fuse-1.c scan-tree-dump-times forwprop4 "gimple_simplified to[^\\n]*\\^ 12" 1
FAIL: gcc.dg/graphite/fuse-1.c scan-tree-dump-times forwprop4 "gimple_simplified to[^\\n]*\\^ 12" 1
FAIL: g++.dg/lto/pr68057 cp_lto_pr68057_0.o-cp_lto_pr68057_1.o execute -O0 -flto -flto-partition=1to1 -fno-use-linker-plugin 
FAIL: g++.dg/lto/pr68057 cp_lto_pr68057_0.o-cp_lto_pr68057_1.o execute -O0 -flto -flto-partition=1to1 -fno-use-linker-plugin 
FAIL: g++.dg/lto/pr68057 cp_lto_pr68057_0.o-cp_lto_pr68057_1.o execute -O0 -flto -flto-partition=none -fuse-linker-plugin
FAIL: g++.dg/lto/pr68057 cp_lto_pr68057_0.o-cp_lto_pr68057_1.o execute -O0 -flto -flto-partition=none -fuse-linker-plugin
FAIL: g++.dg/lto/pr68057 cp_lto_pr68057_0.o-cp_lto_pr68057_1.o execute -O0 -flto -fuse-linker-plugin -fno-fat-lto-objects 
FAIL: g++.dg/lto/pr68057 cp_lto_pr68057_0.o-cp_lto_pr68057_1.o execute -O0 -flto -fuse-linker-plugin -fno-fat-lto-objects 
FAIL: g++.dg/lto/pr68057 cp_lto_pr68057_0.o-cp_lto_pr68057_1.o execute -O2 -flto -flto-partition=1to1 -fno-use-linker-plugin 
FAIL: g++.dg/lto/pr68057 cp_lto_pr68057_0.o-cp_lto_pr68057_1.o execute -O2 -flto -flto-partition=1to1 -fno-use-linker-plugin 
FAIL: g++.dg/lto/pr68057 cp_lto_pr68057_0.o-cp_lto_pr68057_1.o execute -O2 -flto -flto-partition=none -fuse-linker-plugin -fno-fat-lto-objects 
FAIL: g++.dg/lto/pr68057 cp_lto_pr68057_0.o-cp_lto_pr68057_1.o execute -O2 -flto -flto-partition=none -fuse-linker-plugin -fno-fat-lto-objects 
FAIL: g++.dg/lto/pr68057 cp_lto_pr68057_0.o-cp_lto_pr68057_1.o execute -O2 -flto -fuse-linker-plugin
FAIL: g++.dg/lto/pr68057 cp_lto_pr68057_0.o-cp_lto_pr68057_1.o execute -O2 -flto -fuse-linker-plugin

New passes:
FAIL: gfortran.dg/goacc/combined_loop.f90   -O  (test for excess errors)
FAIL: gfortran.dg/goacc/combined_loop.f90   -O  (test for excess errors)