From a27bcd63d0bcde0e08197b1ac0b36c6c132af06c Mon Sep 17 00:00:00 2001
From: Isabella Basso <isabellabdoamaral@usp.br>
Date: Fri, 10 Mar 2023 17:20:09 -0300
Subject: [PATCH] nir/algebraic: extend mediump patterns

Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Suggested-by: Italo Nicola <italonicola@collabora.com>
Signed-off-by: Isabella Basso <isabellabdoamaral@usp.br>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20965>
---
 src/compiler/nir/nir_opt_algebraic.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py
index e8445246979..4857f62bdbe 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -1488,11 +1488,17 @@ optimizations.extend([
    (('i2i32', ('i2imp', 'a@32')), a),
    (('u2u32', ('i2imp', 'a@32')), a),
 
+   # typeA@32 -> typeB@16 -> typeB@32 ==> typeA@32 -> typeB@32
    (('i2i32', ('f2imp', 'a@32')), ('f2i32', a)),
    (('u2u32', ('f2ump', 'a@32')), ('f2u32', a)),
    (('f2f32', ('i2fmp', 'a@32')), ('i2f32', a)),
    (('f2f32', ('u2fmp', 'a@32')), ('u2f32', a)),
 
+   # typeA@32 -> typeA@16 -> typeB@32 ==> typeA@32 -> typeB@32
+   (('f2i32', ('f2fmp', 'a@32')), ('f2i32', a)),
+   (('f2u32', ('f2fmp', 'a@32')), ('f2u32', a)),
+   (('i2f32', ('i2imp', 'a@32')), ('i2f32', a)),
+
    # Conversions from float32 to float64 and back can be removed as long as
    # it doesn't need to be precise, since the conversion may e.g. flush denorms
    (('~f2f32', ('f2f64', 'a@32')), a),