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| author |   Richard Henderson <rth@twiddle.net> | 2016-04-05 19:43:40 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2017-02-14 08:15:00 +1100 |
| commit | 6597c28d618a3d16d468770b7c30a0237a8c8ea9 (patch) | |
| tree | 45f88af4cf649ce36afadd421965ae88d5173ea6 /scripts/qapi-commands.py | |
| parent | target/openrisc: Tidy handling of delayed branches (diff) | |
| download | qemu-6597c28d618a3d16d468770b7c30a0237a8c8ea9.tar.xz qemu-6597c28d618a3d16d468770b7c30a0237a8c8ea9.zip | |
target/openrisc: Optimize for r0 being zero
The HW does not special-case r0, but the ABI specifies that r0 should
contain 0. If we expose this fact to the optimizer, we can simplify
a lot of the generated code. We must of course verify that r0==0, but
that is trivial to do with a TB flag.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'scripts/qapi-commands.py')
0 files changed, 0 insertions, 0 deletions