From 9f3ffb996b0d02ca64b492d22ff158e8f3659257 Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Sun, 30 May 2021 19:13:22 -0400
Subject: glsl: Rework var alloc to not assign unused results

---
 .../backend/glsl/emit_glsl_bitwise_conversion.cpp                 | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'src/shader_recompiler/backend/glsl/emit_glsl_bitwise_conversion.cpp')

diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_bitwise_conversion.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_bitwise_conversion.cpp
index 2b08aa593..9d844b831 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_bitwise_conversion.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_bitwise_conversion.cpp
@@ -26,7 +26,13 @@ void EmitIdentity(EmitContext&, IR::Inst& inst, const IR::Value& value) {
 }
 
 void EmitConditionRef(EmitContext& ctx, IR::Inst& inst, const IR::Value& value) {
-    ctx.AddU1("{}={};", inst, ctx.var_alloc.Consume(value));
+    // Fake one usage to get a real variable out of the condition
+    inst.DestructiveAddUsage(1);
+    const auto ret{ctx.var_alloc.Define(inst, GlslVarType::U1)};
+    const auto input{ctx.var_alloc.Consume(value)};
+    if (ret != input) {
+        ctx.Add("{}={};", ret, input);
+    }
 }
 
 void EmitBitCastU16F16([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst) {
-- 
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