llvm-project

09b772e2 - [flang] Postpone hlfir.end_associate generation for calls. (#138786)

[flang] Postpone hlfir.end_associate generation for calls. (#138786) If we generate hlfir.end_associate at the end of the statement, we get easier optimizable HLFIR, because there are no compiler generated operations with side-effects in between the call and the consumers. This allows more hlfir.eval_in_mem to reuse the LHS instead of allocating temporary buffer. I do not think the same can be done for hlfir.copy_out always, e.g.: ``` subroutine test2(x) interface function array_func2(x,y) real:: x(*), array_func2(10), y end function array_func2 end interface real :: x(:) x = array_func2(x, 1.0) end subroutine test2 ``` If we postpone the copy-out until after the assignment, then the result may be wrong.