diff options
| author | Alyssa Rosenzweig <[email protected]> | 2019-07-25 15:34:13 -0700 |
|---|---|---|
| committer | Alyssa Rosenzweig <[email protected]> | 2019-07-26 08:37:09 -0700 |
| commit | 20771ede1c0de3dfa4ae3b8ac61e54dbbf7476d8 (patch) | |
| tree | 56cebd8d24c0ce753e6172ae2d95ac9c965efa13 /src/panfrost/midgard/compiler.h | |
| parent | cb6dea6b4dcb665a917c03de2a174410410af8f6 (diff) | |
pan/midgard: Add post-RA move elimination
Think of this pass as register coalescing part 2. After RA runs, but
before scheduling, we scan for code of the form:
mov rN, rN
and delete the move, since it's totally redundant. This pass helps
already, but it'd of course be much more effective paired with
register coalescing to encourage moves in general to end up in this
form. Nevertheless, even by itself:
total instructions in shared programs: 3665 -> 3613 (-1.42%)
instructions in affected programs: 2046 -> 1994 (-2.54%)
helped: 52
HURT: 0
helped stats (abs) min: 1 max: 1 x̄: 1.00 x̃: 1
helped stats (rel) min: 0.19% max: 25.00% x̄: 8.02% x̃: 4.00%
95% mean confidence interval for instructions value: -1.00 -1.00
95% mean confidence interval for instructions %-change: -10.26% -5.79%
Instructions are helped.
total bundles in shared programs: 2256 -> 2213 (-1.91%)
bundles in affected programs: 1154 -> 1111 (-3.73%)
helped: 43
HURT: 0
helped stats (abs) min: 1 max: 1 x̄: 1.00 x̃: 1
helped stats (rel) min: 0.33% max: 25.00% x̄: 9.10% x̃: 5.56%
95% mean confidence interval for bundles value: -1.00 -1.00
95% mean confidence interval for bundles %-change: -11.60% -6.60%
Bundles are helped.
total quadwords in shared programs: 3689 -> 3642 (-1.27%)
quadwords in affected programs: 2025 -> 1978 (-2.32%)
helped: 47
HURT: 0
helped stats (abs) min: 1 max: 1 x̄: 1.00 x̃: 1
helped stats (rel) min: 0.19% max: 25.00% x̄: 7.86% x̃: 3.85%
95% mean confidence interval for quadwords value: -1.00 -1.00
95% mean confidence interval for quadwords %-change: -10.30% -5.42%
Quadwords are helped.
Signed-off-by: Alyssa Rosenzweig <[email protected]>
Diffstat (limited to 'src/panfrost/midgard/compiler.h')
| -rw-r--r-- | src/panfrost/midgard/compiler.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/panfrost/midgard/compiler.h b/src/panfrost/midgard/compiler.h index 034a256589a..f3fd92ad50b 100644 --- a/src/panfrost/midgard/compiler.h +++ b/src/panfrost/midgard/compiler.h @@ -509,5 +509,6 @@ bool midgard_opt_combine_projection(compiler_context *ctx, midgard_block *block) bool midgard_opt_varying_projection(compiler_context *ctx, midgard_block *block); bool midgard_opt_dead_code_eliminate(compiler_context *ctx, midgard_block *block); bool midgard_opt_dead_move_eliminate(compiler_context *ctx, midgard_block *block); +void midgard_opt_post_move_eliminate(compiler_context *ctx, midgard_block *block, struct ra_graph *g); #endif |