On 8/24/2026 7:03 AM, Aldy Hernandez wrote:
Both the jump threader's joiner registration and the upcoming phiopt
replication of PHI-of-compares joins need a way to determine if a
block on an edge can be duplicated. Abstract out the code in
tree-ssa-threadedge.cc to be reusable by the upcoming work.
OK?
PR tree-optimization/126896
gcc/ChangeLog:
* cfghooks.cc (can_duplicate_block_on_edge_p): New.
* cfghooks.h (can_duplicate_block_on_edge_p): Declare.
* tree-ssa-threadedge.cc: Include cfghooks.h.
(jump_threader::thread_across_edge): Use
can_duplicate_block_on_edge_p.
OK
jeff
