Regressions on master at commit r15-3082 vs commit r15-3081 on Linux/x86_64

[Haochen Jiang]

Regressions on master at commit r15-3082 vs commit r15-3081 on Linux/x86_64
New failures:
FAIL: gcc.dg/vect/vect-mod-var.c execution test
FAIL: gcc.dg/vect/vect-mod-var.c execution test
FAIL: gcc.dg/vect/vect-mod-var.c -flto -ffat-lto-objects execution test
FAIL: gcc.dg/vect/vect-mod-var.c -flto -ffat-lto-objects execution test

New passes:
FAIL: gcc.dg/torture/convert-dfp-2.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (test for excess errors)
FAIL: gcc.dg/torture/convert-dfp.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (test for excess errors)