Regressions on master at commit r12-5198 vs commit r12-5186 on Linux/x86_64

[H.J. Lu]

New failures:
FAIL: c-c++-common/goacc/firstprivate-mappings-1.c scan-tree-dump omplower "(?n)#pragma omp target oacc_parallel firstprivate\\(array_li.[0-9]+\\) map\\(from:array_so \\[len: 4\\]\\) \\["
FAIL: c-c++-common/goacc/firstprivate-mappings-1.c scan-tree-dump omplower "(?n)#pragma omp target oacc_parallel firstprivate\\(array_li.[0-9]+\\) map\\(from:array_so \\[len: 4\\]\\) \\["
FAIL: gcc.dg/guality/pr36728-4.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  -DPREVENT_OPTIMIZATION line 14 y == 2
FAIL: gcc.dg/guality/pr36728-4.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  -DPREVENT_OPTIMIZATION line 16 y == 2
FAIL: gcc.dg/guality/pr36728-4.c   -O3 -g  -DPREVENT_OPTIMIZATION  line 16 y == 2

New passes:
FAIL: gcc.target/i386/pr91333.c scan-assembler-times vmovapd|vmovsd 3
FAIL: gcc.target/i386/pr91333.c scan-assembler-times vmovapd|vmovsd 3