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| author | Björn Gustavsson <[email protected]> | 2012-04-01 09:28:34 +0200 |
|---|---|---|
| committer | Björn Gustavsson <[email protected]> | 2015-07-06 13:37:55 +0200 |
| commit | 6d6fce257cf666113e982c0887121739dff5bf1d (patch) | |
| tree | b4aae4f7dd73aefb4c50faba2d2bb5de87ae75ef /lib/hipe/opt/hipe_target_machine.erl | |
| parent | fad052472def54fff1268b21313b15bd666437c3 (diff) | |
| download | otp-6d6fce257cf666113e982c0887121739dff5bf1d.tar.gz otp-6d6fce257cf666113e982c0887121739dff5bf1d.tar.bz2 otp-6d6fce257cf666113e982c0887121739dff5bf1d.zip | |
Eliminate prefetch for conditional instructions
Not pre-fetching in conditional instructions (instructions that use
-fail_action) seems to improve performance slightly.
The reason for that is that conditional instructions may jump to the
failure label, wasting the pre-fetched instruction. Another reason
is that that many conditional instructions do a function call, and
the register pressure is therefore high. Avoiding the pre-fetch
may reduce the register pressure and pontentially result in more
efficient code.
Diffstat (limited to 'lib/hipe/opt/hipe_target_machine.erl')
0 files changed, 0 insertions, 0 deletions