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glsl: Optimize the SoftFP64 shader when first creating it. 

By optimizing the shader before inlining, we avoid having to redo this
work for each inlined copy of a function.  It should also reduce the
memory consumption a bit.

This cuts the KHR-GL46.arrays_of_arrays_gl.SubroutineFunctionCalls2
runtime by 25% on my Icelake.  That test compiles many shaders, which
contain large types (dmat4) and division (expensive operations).

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Kenneth Graunke 2019-08-08 01:44:52 -07:00
parent 914ecc9384
commit 5180a222c0
1 changed files with 13 additions and 0 deletions
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13
src/compiler/glsl/glsl_to_nir.cpp
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@ -2688,5 +2688,18 @@ glsl_float64_funcs_to_nir(struct gl_context *ctx,
NIR_PASS_V(nir, nir_inline_functions);
NIR_PASS_V(nir, nir_opt_deref);
/* Do some optimizations to clean up the shader now. By optimizing the
* functions in the library, we avoid having to re-do that work every
* time we inline a copy of a function. Reducing basic blocks also helps
* with compile times.
*/
NIR_PASS_V(nir, nir_lower_vars_to_ssa);
NIR_PASS_V(nir, nir_copy_prop);
NIR_PASS_V(nir, nir_opt_dce);
NIR_PASS_V(nir, nir_opt_cse);
NIR_PASS_V(nir, nir_opt_gcm, true);
NIR_PASS_V(nir, nir_opt_peephole_select, 1, false, false);
NIR_PASS_V(nir, nir_opt_dce);
return nir;
}