V2: Fix whitespace issues
Put in alphabetic order
Split resolve of add into a separate function for reuse later
Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>
---
src/glsl/opt_minmax.cpp | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/src/glsl/opt_minmax.cpp b/src/glsl/opt_minmax.cpp
index 43d6061..4153a48 100644
--- a/src/glsl/opt_minmax.cpp
+++ b/src/glsl/opt_minmax.cpp
@@ -282,6 +282,24 @@ range_intersection(minmax_range r0, minmax_range r1)
return ret;
}
+/* Takes the range of the operands in an add-operation as parameters
+ * and uses this to solve the range of the add-operation itself.
+ */
+static minmax_range
+resolv_add_range(minmax_range r0, minmax_range r1)
+{
+ ir_constant *low = NULL;
+ ir_constant *high = NULL;
+
+ if (r0.low && r1.low)
+ low = add(r0.low, r1.low)->constant_expression_value();
+
+ if (r0.high && r1.high)
+ high = add(r0.high, r1.high)->constant_expression_value();
+
+ return minmax_range(low, high);
+}
+
static minmax_range
get_range(ir_rvalue *rval)
{
@@ -360,6 +378,11 @@ get_range(ir_rvalue *rval)
return minmax_range(new(mem_ctx) ir_constant(-1.0f),
new(mem_ctx) ir_constant(1.0f));
+ case ir_binop_add:
+ r0 = get_range(expr->operands[0]);
+ r1 = get_range(expr->operands[1]);
+ return resolv_add_range(r0, r1);
+
case ir_binop_min:
case ir_binop_max:
r0 = get_range(expr->operands[0]);
--
2.2.1
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