https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65413
Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-03-14
CC| |segher at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |segher at gcc dot
gnu.org
Target Milestone|--- |6.0
Summary|inefficient code returning |inefficient code returning
|aggregates on powepc64le |aggregates on powerpc64le
Ever confirmed|0 |1
--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
This is first expanded to a copy of the arg to a struct on stack; then
CSE etc. keep everything in regs, and DSE removes the stores completely.
We are left with copying 0 to a reg, and then copying parts of the arg
to a zero_extract of that. Which combine will not handle (see
combinable_i3pat, the "inner_dest != dest" branch).
This will get better when we no longer write rl*imi as a zero_extract,
hopefully completely solved even. We'll see. Mine.
