https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103926
--- Comment #3 from Alexey Kardashevskiy <aik at ozlabs dot ru> --- Documented here: https://dmalcolm.fedorapeople.org/gcc/2015-08-31/rst-experiment/how-to-use-inline-assembly-language-in-c-code.html Your example does not compile either (but does not crash :) ) This one does compile: asm volatile("lq %0, %1" : "=&r" (v) : "wQ" (*(__int128 *)ptr)); Anyway, I posted this bug because of the crash than anything else.
