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freedreno/ir3: ignore unused inputs 

We could end up w/ inputs larger than vec4, simply because unused inputs
are not split.

Fixes things like dEQP-GLES31.functional.separate_shader.random.77 (and
probably a handful of others)

Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Rob Clark 2018-08-21 08:33:39 -04:00
parent 6b4397feab
commit 1a24f51966
1 changed files with 29 additions and 1 deletions
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30
src/gallium/drivers/freedreno/ir3/ir3_compiler_nir.c
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@ -3233,6 +3233,25 @@ create_frag_coord(struct ir3_context *ctx, unsigned comp)
}
}
static uint64_t
input_bitmask(struct ir3_context *ctx, nir_variable *in)
{
unsigned ncomp = glsl_get_components(in->type);
unsigned slot = in->data.location;
/* let's pretend things other than vec4 don't exist: */
ncomp = MAX2(ncomp, 4);
if (ctx->so->type == SHADER_FRAGMENT) {
/* see st_nir_fixup_varying_slots(): */
if (slot >= VARYING_SLOT_VAR9)
slot -= 9;
}
/* Note that info.inputs_read is in units of vec4 slots: */
return ((1ull << (ncomp/4)) - 1) << slot;
}
static void
setup_input(struct ir3_context *ctx, nir_variable *in)
{
@ -3247,6 +3266,15 @@ setup_input(struct ir3_context *ctx, nir_variable *in)
/* let's pretend things other than vec4 don't exist: */
ncomp = MAX2(ncomp, 4);
/* skip unread inputs, we could end up with (for example), unsplit
* matrix/etc inputs in the case they are not read, so just silently
* skip these.
*
*/
if (!(ctx->s->info.inputs_read & input_bitmask(ctx, in)))
return;
compile_assert(ctx, ncomp == 4);
so->inputs[n].slot = slot;
@ -3264,7 +3292,7 @@ setup_input(struct ir3_context *ctx, nir_variable *in)
so->frag_coord = true;
instr = create_frag_coord(ctx, i);
} else if (slot == VARYING_SLOT_PNTC) {
/* see for example st_get_generic_varying_index().. this is
/* see for example st_nir_fixup_varying_slots().. this is
* maybe a bit mesa/st specific. But we need things to line
* up for this in fdN_program:
* unsigned texmask = 1 << (slot - VARYING_SLOT_VAR0);