[Mesa-dev] [PATCH 06/16] glsl: Add sin, cos and sign to get_range

[Thomas Helland]

They are bound between -1 and 1, so report that.
---
 src/glsl/opt_minmax.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/glsl/opt_minmax.cpp b/src/glsl/opt_minmax.cpp
index 111d183..341006e 100644
--- a/src/glsl/opt_minmax.cpp
+++ b/src/glsl/opt_minmax.cpp
@@ -271,6 +271,10 @@ get_range(ir_rvalue *rval)
    minmax_range r0;
    minmax_range r1;
 
+   void *mem_ctx = ralloc_parent(rval);
+   ir_constant *low = NULL;
+   ir_constant *high = NULL;
+
    if(expr) {
       switch(expr->operation) {
       case ir_binop_min:
@@ -279,6 +283,15 @@ get_range(ir_rvalue *rval)
          r1 = get_range(expr->operands[1]);
          return combine_range(r0, r1, expr->operation == ir_binop_min);
 
+      case ir_unop_sin:
+      case ir_unop_sin_reduced:
+      case ir_unop_cos:
+      case ir_unop_cos_reduced:
+      case ir_unop_sign:
+         high = new(mem_ctx) ir_constant(1.0f);
+         low = new(mem_ctx) ir_constant(-1.0f);
+         return minmax_range(low, high);
+
       default:
          break;
       }
-- 
2.0.3