https://gcc.gnu.org/bugzilla/show_bug.cgi?id=15319
Bernd Edlinger <edlinger at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|REOPENED |RESOLVED Resolution|--- |DUPLICATE Known to fail| | --- Comment #6 from Bernd Edlinger <edlinger at gcc dot gnu.org> --- fixed in gcc-7 which emits an error message for this: test.c: In function 'main': test.c:5:9: error: explicitly used regs must be grouped at top of stack asm ( " fmul %1,%0" ^~~ *** This bug has been marked as a duplicate of bug 68843 ***