Commit Graph

5 Commits

Author SHA1 Message Date
Krzysztof Parzyszek 5ffd808a27 [Hexagon] Improve scheduling heuristic for large basic blocks
This patch changes the isLatencyBound heuristic to look at the
path length based upon the number of packets needed to schedule
a basic block. For small basic blocks, the heuristic uses a small
threshold for isLatencyBound. For large basic blocks, the
heuristic uses a large threshold.

The goal is to increase the priority of an instruction in a small
basic block that has a large height or depth relative to the code
size. For large functions, the height and depth are ignored
because it increases the live range of a register and causes more
spills. That is, for large functions, it is more important to
schedule instructions when available, and attempt to keep the defs
and uses closer together.

Patch by Brendon Cahoon.

llvm-svn: 327987
2018-03-20 14:54:01 +00:00
Krzysztof Parzyszek f81a8d03c1 [Hexagon] Avoid bank conflicts in post-RA scheduler
Avoid scheduling two loads in such a way that they would end up in the
same packet. If there is a load in a packet, try to schedule a non-load
next.

Patch by Brendon Cahoon.

llvm-svn: 327742
2018-03-16 20:55:49 +00:00
Eugene Zelenko 58655bbc60 [Hexagon] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).
llvm-svn: 290024
2016-12-17 01:09:05 +00:00
Krzysztof Parzyszek 22ae7df6f4 Fix license information in the file header
llvm-svn: 277145
2016-07-29 14:04:17 +00:00
Krzysztof Parzyszek 0005a7284f Add missing files to r277143
llvm-svn: 277144
2016-07-29 13:59:55 +00:00