[Bug inline-asm/42984] gcc produces broken code when passing struct pointer to static inline function with asm()

[d dot g dot gorbachev at gmail dot com]

------- Comment #1 from d dot g dot gorbachev at gmail dot com  2010-02-06 
10:18 -------
I believe that GCC is correct, and you should write

  asm volatile ("swi #0" :: "r" (a), "m" (*t));

Quoting from <http://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html>:
> Note that in the following example the memory input is
> necessary, otherwise GCC might optimize the store to x away


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42984