Mesa (master): i965/fs: Fix register unspills from a reg_offset.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: 32182bb004923c8746803aa88d4b4505e4124b8c
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=32182bb004923c8746803aa88d4b4505e4124b8c

Author: Eric Anholt <eric at anholt.net>
Date:   Wed Oct 16 12:39:07 2013 -0700

i965/fs: Fix register unspills from a reg_offset.

We were clearing the reg_offset before trying to use it.  Oops.  Fixes
glsl-fs-texture2drect with the reg spilling debug enabled.

Reviewed-by: Paul Berry <stereotype441 at gmail.com>

---

 src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp b/src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp
index 64fb78b..0102b2e 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp
@@ -677,13 +677,13 @@ fs_visitor::spill_reg(int spill_reg)
 	 if (inst->src[i].file == GRF &&
 	     inst->src[i].reg == spill_reg) {
             int regs_read = inst->regs_read(this, i);
+            int subset_spill_offset = (spill_offset +
+                                       reg_size * inst->src[i].reg_offset);
 
             inst->src[i].reg = virtual_grf_alloc(regs_read);
             inst->src[i].reg_offset = 0;
 
-            emit_unspill(inst, inst->src[i],
-                         spill_offset + reg_size * inst->src[i].reg_offset,
-                         regs_read);
+            emit_unspill(inst, inst->src[i], subset_spill_offset, regs_read);
 	 }
       }