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glsl/glsl_to_nir: remove unreachable code

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This hack in glsl_to_nir() to clean up after the glsl ir linker should
no longer be reachable. These type of linking opts are now done via
a nir based linker long after GLSL IR has been coverted to nir by
this pass.

Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19104>
This commit is contained in:
Timothy Arceri
2022-10-17 13:28:19 +11:00
committed by Marge Bot
parent c7e9268658
commit ac7f4e0942
1 changed files with 13 additions and 23 deletions
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36
src/compiler/glsl/glsl_to_nir.cpp
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@@ -1886,30 +1886,20 @@ nir_visitor::visit(ir_expression *ir)
deref->accept(this);
assert(nir_deref_mode_is(this->deref, nir_var_shader_in));
nir_intrinsic_op op;
if (nir_deref_mode_is(this->deref, nir_var_shader_in)) {
switch (ir->operation) {
case ir_unop_interpolate_at_centroid:
op = nir_intrinsic_interp_deref_at_centroid;
break;
case ir_binop_interpolate_at_offset:
op = nir_intrinsic_interp_deref_at_offset;
break;
case ir_binop_interpolate_at_sample:
op = nir_intrinsic_interp_deref_at_sample;
break;
default:
unreachable("Invalid interpolation intrinsic");
}
} else {
/* This case can happen if the vertex shader does not write the
* given varying. In this case, the linker will lower it to a
* global variable. Since interpolating a variable makes no
* sense, we'll just turn it into a load which will probably
* eventually end up as an SSA definition.
*/
assert(nir_deref_mode_is(this->deref, nir_var_shader_temp));
op = nir_intrinsic_load_deref;
switch (ir->operation) {
case ir_unop_interpolate_at_centroid:
op = nir_intrinsic_interp_deref_at_centroid;
break;
case ir_binop_interpolate_at_offset:
op = nir_intrinsic_interp_deref_at_offset;
break;
case ir_binop_interpolate_at_sample:
op = nir_intrinsic_interp_deref_at_sample;
break;
default:
unreachable("Invalid interpolation intrinsic");
}
nir_intrinsic_instr *intrin = nir_intrinsic_instr_create(shader, op);