From d79061dba1ef40eb52db75dd1f558e1715d4037f Mon Sep 17 00:00:00 2001
From: Emma Anholt <emma@anholt.net>
Date: Wed, 22 Feb 2023 11:34:57 -0800
Subject: [PATCH] glsl/opt_algebraic: Drop log(exp(x)) -> x and exp(log(x)) ->
 x optimisations.
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No change on freedreno shader-db.

Acked-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21475>
---
 src/compiler/glsl/opt_algebraic.cpp | 31 -----------------------------
 1 file changed, 31 deletions(-)

diff --git a/src/compiler/glsl/opt_algebraic.cpp b/src/compiler/glsl/opt_algebraic.cpp
index 21f1409e28d..debc8b6234d 100644
--- a/src/compiler/glsl/opt_algebraic.cpp
+++ b/src/compiler/glsl/opt_algebraic.cpp
@@ -327,32 +327,10 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir)
       }
       break;
 
-   case ir_unop_exp:
-      if (op_expr[0] == NULL)
-	 break;
-
-      if (op_expr[0]->operation == ir_unop_log) {
-         return op_expr[0]->operands[0];
-      }
-      break;
-
-   case ir_unop_log:
-      if (op_expr[0] == NULL)
-	 break;
-
-      if (op_expr[0]->operation == ir_unop_exp) {
-         return op_expr[0]->operands[0];
-      }
-      break;
-
    case ir_unop_exp2:
       if (op_expr[0] == NULL)
 	 break;
 
-      if (op_expr[0]->operation == ir_unop_log2) {
-         return op_expr[0]->operands[0];
-      }
-
       if (op_expr[0]->operation == ir_binop_mul) {
          for (int log2_pos = 0; log2_pos < 2; log2_pos++) {
             ir_expression *log2_expr =
@@ -368,15 +346,6 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir)
       }
       break;
 
-   case ir_unop_log2:
-      if (op_expr[0] == NULL)
-	 break;
-
-      if (op_expr[0]->operation == ir_unop_exp2) {
-         return op_expr[0]->operands[0];
-      }
-      break;
-
    case ir_unop_f2i:
    case ir_unop_f2u:
       if (op_expr[0] && op_expr[0]->operation == ir_unop_trunc) {