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nir: Stop whacking gl_FrontFacing to a system value

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We have a cap bit for gallium and a GLSL compiler flag to control this.
Just trust what GLSL gives us and stop forcing it.  In order for this to
be safe, we have to advertise another cap in some of the gallium
drivers.

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Jason Ekstrand
2019-07-31 15:17:17 -05:00
parent 4e736b88f3
commit 70dc017aec
5 changed files with 7 additions and 7 deletions
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src/compiler/glsl/glsl_to_nir.cpp
+2 -7
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@@ -460,13 +460,8 @@ nir_visitor::visit(ir_variable *ir)
break;
case ir_var_shader_in:
if (shader->info.stage == MESA_SHADER_FRAGMENT &&
ir->data.location == VARYING_SLOT_FACE) {
/* For whatever reason, GLSL IR makes gl_FrontFacing an input */
var->data.location = SYSTEM_VALUE_FRONT_FACE;
var->data.mode = nir_var_system_value;
} else if (shader->info.stage == MESA_SHADER_GEOMETRY &&
ir->data.location == VARYING_SLOT_PRIMITIVE_ID) {
if (shader->info.stage == MESA_SHADER_GEOMETRY &&
ir->data.location == VARYING_SLOT_PRIMITIVE_ID) {
/* For whatever reason, GLSL IR makes gl_PrimitiveIDIn an input */
var->data.location = SYSTEM_VALUE_PRIMITIVE_ID;
var->data.mode = nir_var_system_value;