Mesa (master): glsl_to_tgsi: Assert that the _mesa_sysval_to_semantic mapping is correct

[Kenneth Graunke]

Module: Mesa
Branch: master
Commit: 5d7275c350f1e05f7c9a06316e1826bf42bb769b
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=5d7275c350f1e05f7c9a06316e1826bf42bb769b

Author: Ian Romanick <ian.d.romanick at intel.com>
Date:   Wed Jun 18 15:43:32 2014 -0700

glsl_to_tgsi: Assert that the _mesa_sysval_to_semantic mapping is correct

Future patches will rearrange the values in gl_system_value, and I want
to catch errors.  Designated initializers would make all of this
unnecessary.

v2: Don't use STATIC_ASSERT.  Not only does it not work, but GCC doesn't
tell you that it's not going to work.  Thanks for nothing!

Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
Reviewed-by: Marek Olšák <marek.olsak at amd.com>
Reviewed-by: Roland Scheidegger <sroland at vmware.com>

---

 src/mesa/state_tracker/st_glsl_to_tgsi.cpp |   15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 3c8acee..b4638dd 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -4904,6 +4904,21 @@ st_translate_program(
    assert(numInputs <= Elements(t->inputs));
    assert(numOutputs <= Elements(t->outputs));
 
+   assert(_mesa_sysval_to_semantic[SYSTEM_VALUE_FRONT_FACE] ==
+          TGSI_SEMANTIC_FACE);
+   assert(_mesa_sysval_to_semantic[SYSTEM_VALUE_VERTEX_ID] ==
+          TGSI_SEMANTIC_VERTEXID);
+   assert(_mesa_sysval_to_semantic[SYSTEM_VALUE_INSTANCE_ID] ==
+          TGSI_SEMANTIC_INSTANCEID);
+   assert(_mesa_sysval_to_semantic[SYSTEM_VALUE_SAMPLE_ID] ==
+          TGSI_SEMANTIC_SAMPLEID);
+   assert(_mesa_sysval_to_semantic[SYSTEM_VALUE_SAMPLE_POS] ==
+          TGSI_SEMANTIC_SAMPLEPOS);
+   assert(_mesa_sysval_to_semantic[SYSTEM_VALUE_SAMPLE_MASK_IN] ==
+          TGSI_SEMANTIC_SAMPLEMASK);
+   assert(_mesa_sysval_to_semantic[SYSTEM_VALUE_INVOCATION_ID] ==
+          TGSI_SEMANTIC_INVOCATIONID);
+
    t = CALLOC_STRUCT(st_translate);
    if (!t) {
       ret = PIPE_ERROR_OUT_OF_MEMORY;