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nir: Make nir_lower_wpos_ytransform() match FragCoord by location.

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gl_FragCoord is a shader input with location == VARYING_SLOT_POS.
ARB_fragment_programs have an equivalent input at VARYING_SLOT_POS,
but it isn't called gl_FragCoord.  We do want to transform it.

Matching by location guarantees we catch both.

Fixes several fp tests on a branch which uses this pass on i965.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Kenneth Graunke 2016-05-18 09:31:49 -07:00
parent c9192fcbd2
commit 88ea960aa7
1 changed files with 2 additions and 1 deletions
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src/compiler/nir/nir_lower_wpos_ytransform.c
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@ -286,7 +286,8 @@ lower_wpos_ytransform_block(lower_wpos_ytransform_state *state, nir_block *block
nir_deref_var *dvar = intr->variables[0];
nir_variable *var = dvar->var;
if (strcmp(var->name, "gl_FragCoord") == 0) {
if (var->data.mode == nir_var_shader_in &&
var->data.location == VARYING_SLOT_POS) {
/* gl_FragCoord should not have array/struct deref's: */
assert(dvar->deref.child == NULL);
lower_fragcoord(state, intr);