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nir/lower_io_to_scalar: Look at derefs for modes 

This is instead of looking all the way back to the variable which may
not exist for all derefs.  This makes this code properly ignore casts
with modes other than the mode[s] we care about (where casts aren't
allowed).

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
This commit is contained in:
Jason Ekstrand 2018-12-13 15:01:05 -06:00
parent 3fe0363dda
commit 867fe35a16
1 changed files with 6 additions and 3 deletions
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9
src/compiler/nir/nir_lower_io_to_scalar.c
View File

@ -308,9 +308,12 @@ nir_lower_io_to_scalar_early(nir_shader *shader, nir_variable_mode mask)
intr->intrinsic != nir_intrinsic_interp_deref_at_offset)
continue;
nir_variable *var =
nir_deref_instr_get_variable(nir_src_as_deref(intr->src[0]));
nir_variable_mode mode = var->data.mode;
nir_deref_instr *deref = nir_src_as_deref(intr->src[0]);
nir_variable_mode mode = deref->mode;
if (!(mode & mask))
continue;
nir_variable *var = nir_deref_instr_get_variable(deref);
/* TODO: add patch support */
if (var->data.patch)