> While it is straight forward to remove the movmisalign path in 4.9 and 4.8, > this is not so simple in the 4.7 branch. The reason is that 4.7 uses > "to_rtx = expand_normal (tem);" while 4.8 and 4.9 use > "to_rtx = expand_expr (tem, NULL_RTX, VOIDmode, EXPAND_WRITE);" > which does almost the same, but returns the misaligned rtx instead of > an register with the value of the structure. And the generated code without > the misalign path fails simply because the assignment goes to the register > instead of the structure. > > So the problem is: there is no EXPAND_WRITE/EXPAND_MEMORY in 4.7... > > A possible patch for 4.7 would be like the attached (untested) patch.
Let's simply declare this as WONTFIX on the 4.7 branch. -- Eric Botcazou
