[Bug c/29970] mixing ({...}) with VLA leads to massive breakage

[muecker at gwdg dot de via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29970

--- Comment #13 from Martin Uecker <muecker at gwdg dot de> ---
The remaining problem with constant index 0 for the patch mentioned above,
appears to be related to fold_binary_loc which transforms (a + (x, 0)) to (x,
a) which breaks if 'x' depends on something in 'a'.