The only values allowed are 0 and 1, and the value is checked before
assigning.
This is a copy of 8eeca7a56c that seems to have been made to the glsl
ir type after it was copied for use in nir but before nir landed.
---
src/glsl/nir/nir.h | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h
index 4551d09..d47f352 100644
--- a/src/glsl/nir/nir.h
+++ b/src/glsl/nir/nir.h
@@ -293,9 +293,13 @@ typedef struct {
unsigned int driver_location;
/**
- * output index for dual source blending.
+ * Output index for dual source blending.
+ *
+ * \note
+ * The GLSL spec only allows the values 0 or 1 for the index in \b dual
+ * source blending.
*/
- int index;
+ unsigned index:1;
/**
* Initial binding point for a sampler or UBO.
--
2.4.3
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