[Mesa-dev] [PATCH 08/16] glsl: Add abs to get_range

[Thomas Helland]

---
 src/glsl/opt_minmax.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/glsl/opt_minmax.cpp b/src/glsl/opt_minmax.cpp
index b925aaa..a48d4d8 100644
--- a/src/glsl/opt_minmax.cpp
+++ b/src/glsl/opt_minmax.cpp
@@ -283,6 +283,16 @@ get_range(ir_rvalue *rval)
          r1 = get_range(expr->operands[1]);
          return combine_range(r0, r1, expr->operation == ir_binop_min);
 
+      case ir_unop_abs:
+         r0 = get_range(expr->operands[0]);
+         if (is_greater_than_zero(r0.low))
+            low = r0.low;
+         else
+            low = new(mem_ctx) ir_constant(0.0f);
+         if (r0.high && r0.low)
+            high = larger_constant(r0.high, abs(r0.low)->constant_expression_value());
+         return minmax_range(low, high);
+
       case ir_unop_sin:
       case ir_unop_sin_reduced:
       case ir_unop_cos:
-- 
2.0.3