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pan/mdg: Promote imov to fmov on a NIR level

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Avoids dedicated MIR promote_fmov pass which is unnecessary.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5151>
This commit is contained in:
Alyssa Rosenzweig 2020-05-21 12:31:40 -04:00 • committed by Marge Bot
parent 3cfe2fc1b1
commit 72c1e3a66a
1 changed files with 8 additions and 1 deletions
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9
src/panfrost/midgard/midgard_compile.c
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@ -961,6 +961,14 @@ emit_alu(compiler_context *ctx, nir_alu_instr *instr)
return;
}
/* Promote imov to fmov if it might help inline a constant */
if (op == midgard_alu_op_imov && nir_src_is_const(instr->src[0].src)
&& nir_src_bit_size(instr->src[0].src) == 32
&& nir_is_same_comp_swizzle(instr->src[0].swizzle,
nir_src_num_components(instr->src[0].src))) {
op = midgard_alu_op_fmov;
}
/* Midgard can perform certain modifiers on output of an ALU op */
unsigned outmod = 0;
@ -2632,7 +2640,6 @@ midgard_compile_shader_nir(nir_shader *nir, panfrost_program *program, bool is_b
mir_foreach_block(ctx, _block) {
midgard_block *block = (midgard_block *) _block;
inline_alu_constants(ctx, block);
midgard_opt_promote_fmov(ctx, block);
embedded_to_inline_constant(ctx, block);
}
/* MIR-level optimizations */