Regressions on trunk at revision 266402 vs revision 266366

[H.J. Lu (x32)]

New failures:

New passes:
FAIL: gcc.target/i386/avx512dq-concatv2si-1.c scan-assembler-times vpinsrd[^\n\r]*\\$1[^\n\r]*%xmm16[^\n\r]*%xmm3 2
FAIL: gcc.target/i386/avx512dq-concatv2si-1.c scan-assembler vpunpckldq[^\n\r]*%xmm17[^\n\r]*%xmm16[^\n\r]*%xmm3
FAIL: gcc.target/i386/avx512vl-concatv2si-1.c scan-assembler vpunpckldq[^\n\r]*%xmm17[^\n\r]*%xmm16[^\n\r]*%xmm3
ERROR: tcl error sourcing /export/gnu/import/git/gcc-test-x32/src-trunk/gcc/testsuite/g++.dg/lto/lto.exp.
ERROR: unmatched open brace in list