https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67145
--- Comment #7 from Alan Modra <amodra at gmail dot com> --- See https://gcc.gnu.org/ml/gcc-patches/2015-05/msg02055.html The patch proposed here will again "simplify" (plus:DI (plus:DI (reg:DI 165 [ val+8 ]) (reg:DI 169 [+8 ])) (reg:DI 76 ca)) to this (plus:DI (plus:DI (reg:DI 76 ca) (reg:DI 165 [ val+8 ])) (reg:DI 169 [+8 ])) breaking the match of rs6000.md adddi3_carry_in_internal. Please do *not* apply this patch as it regresses powerpc64, and please read comment #1 for why the patch is the wrong place to change associativity.
