https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79251
Bug ID: 79251
Summary: PowerPC vec_insert generates store-hit-load if the
element number is variable
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: meissner at gcc dot gnu.org
Target Milestone: ---
In looking at the code generated for vec_insert, except for vec_insert of
64-bit items (i.e. long long, long on 64-bit platforms, and double), the
current GCC compiler generates a vector store to a temporary variable on the
stack, and element store to do the insert, and a vector load.
Perhaps there is a sequence that performs better that can be generated when the
element number is variable.
