From ba75ca6efe89b64259c48d7f994d740507e80679 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jo=C3=A3o=20Capucho?= <jcapucho7@gmail.com>
Date: Tue, 6 Jul 2021 17:19:58 +0100
Subject: [PATCH] [glsl-in] Don't implicitly cast shifts

---
 src/front/glsl/ast.rs | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/front/glsl/ast.rs b/src/front/glsl/ast.rs
index 306bf17958..8ee5e004b4 100644
--- a/src/front/glsl/ast.rs
+++ b/src/front/glsl/ast.rs
@@ -511,9 +511,19 @@ impl<'function> Context<'function> {
                 let (mut left, left_meta) = self.lower_expect(program, left, false, body)?;
                 let (mut right, right_meta) = self.lower_expect(program, right, false, body)?;
 
-                self.binary_implicit_conversion(
-                    program, &mut left, left_meta, &mut right, right_meta,
-                )?;
+                match op {
+                    BinaryOperator::ShiftLeft | BinaryOperator::ShiftRight => self
+                        .implicit_conversion(
+                            program,
+                            &mut right,
+                            right_meta,
+                            ScalarKind::Uint,
+                            4,
+                        )?,
+                    _ => self.binary_implicit_conversion(
+                        program, &mut left, left_meta, &mut right, right_meta,
+                    )?,
+                }
 
                 program.typifier_grow(self, left, left_meta)?;
                 program.typifier_grow(self, right, right_meta)?;