Bug 5819 – DMD doesn't error/warn about illegal asm for 64bit mode

64bit DMD will happily compile this and emit a bad executable. void main() { // All the following should be illegal for x86-64 asm { aaa; // illegal aad; // illegal aam; // illegal aas; // illegal daa; // illegal das; // illegal into; // illegal pop DS; // illegal pop ES; // illegal pop SS; // illegal popa; // illegal push CS; // illegal push DS; // illegal push ES; // illegal push SS; // illegal pusha; // illegal pushf; // illegal popf; // illegal // Miscellaneous issue: // DMD silently replaces EAX with RAX, etc, etc. // Should really be an error. pop EAX; // can't have 32-bit stack operands in 64bit mode push EAX; // can't have 32-bit stack operands in 64bit mode } } Regards

https://github.com/D-Programming-Language/dmd/commit/b9e5a1565113cf641d72125e311578e3611d3ca1 https://github.com/D-Programming-Language/dmd/commit/26816f717b393582842efe6a3fe94ecf97ef4784