From: Eric Anholt <eric@anholt.net>
Date: Fri, 28 Sep 2018 19:40:32 +0000 (-0700)
Subject: v3d: Only add output slot tracking for the current varying slot.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c152c79d5ee59cc8b3936e5b31f8b4203327bc2e;p=mesa.git

v3d: Only add output slot tracking for the current varying slot.

We always emit 4 slots per slot because things like color output and
position processing in the epilogue will potentially look up more values
than the variable declaration had.  However, when we get a .location_frac
!= 0, we don't want to overwrite components of the following
.driver_location.
---

diff --git a/src/broadcom/compiler/nir_to_vir.c b/src/broadcom/compiler/nir_to_vir.c
index 4becc972a63..bb41c1be971 100644
--- a/src/broadcom/compiler/nir_to_vir.c
+++ b/src/broadcom/compiler/nir_to_vir.c
@@ -1396,7 +1396,7 @@ ntq_setup_outputs(struct v3d_compile *c)
                 assert(array_len == 1);
                 (void)array_len;
 
-                for (int i = 0; i < 4; i++) {
+                for (int i = 0; i < 4 - var->data.location_frac; i++) {
                         add_output(c, loc + var->data.location_frac + i,
                                    var->data.location,
                                    var->data.location_frac + i);