https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83565
--- Comment #22 from Sergei Trofimovich <slyfox at inbox dot ru> --- glibc test built with WORD_REGISTER_OPERATIONS unset are also almost not affected: # diff -U0 ../glibc-orig.log ../glibc-no-word.log --- ../glibc-orig.log 2017-12-28 10:49:36.535635523 +0000 +++ ../glibc-no-word.log 2017-12-28 13:03:20.911591933 +0000 @@ -9,0 +10 @@ +FAIL: nptl/tst-cancel21-static @@ -13 +13,0 @@ -FAIL: rt/tst-cpuclock2 @@ -24,2 +24,2 @@ - 292 FAIL - 5286 PASS + 293 FAIL + 5285 PASS (large existing batch of ~280 failures is related to FPU failures on NaN)