Mesa (master): i915g: Only apply the optimization to output vars.

[Stephane Marchesin]

Module: Mesa
Branch: master
Commit: b50d250e02457f367c195ee1808b061e0dfe2d00
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=b50d250e02457f367c195ee1808b061e0dfe2d00

Author: Stéphane Marchesin <marcheu at chromium.org>
Date:   Thu Dec 22 18:17:54 2011 -0800

i915g: Only apply the optimization to output vars.

This is a bit overkill, but otherwise we need to rename subsequent uses, which is a future TODO.
Reported by CME.

---

 src/gallium/drivers/i915/i915_fpc_optimize.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/gallium/drivers/i915/i915_fpc_optimize.c b/src/gallium/drivers/i915/i915_fpc_optimize.c
index 0d680fb..d9b4c46 100644
--- a/src/gallium/drivers/i915/i915_fpc_optimize.c
+++ b/src/gallium/drivers/i915/i915_fpc_optimize.c
@@ -203,6 +203,7 @@ static void i915_fpc_optimize_useless_mov(union i915_full_token* current, union
         next->FullInstruction.Instruction.Saturate == TGSI_SAT_NONE &&
         next->FullInstruction.Src[0].Register.Absolute == 0 &&
         next->FullInstruction.Src[0].Register.Negate == 0 &&
+        next->FullInstruction.Dst[0].Register.File == TGSI_FILE_OUTPUT &&
         is_unswizzled(&next->FullInstruction.Src[0], next->FullInstruction.Dst[0].Register.WriteMask) &&
         current->FullInstruction.Dst[0].Register.WriteMask == next->FullInstruction.Dst[0].Register.WriteMask &&
         same_src_dst_reg(&next->FullInstruction.Src[0], &current->FullInstruction.Dst[0]) )