From: Connor Abbott <connor.w.abb...@intel.com>
This can happen when the source of the compare was split by the SIMD
lowering pass. Potentially, we could allow the case where the exec size
of scan_inst is larger, and scan_inst has the right quarter selected,
but doing that seems a little more risky.
Reviewed-by: Iago Toral Quiroga <ito...@igalia.com>
---
src/mesa/drivers/dri/i965/brw_fs_cmod_propagation.cpp | 3 +++
1 file changed, 3 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_fs_cmod_propagation.cpp
b/src/mesa/drivers/dri/i965/brw_fs_cmod_propagation.cpp
index 8fdc959..93461f7 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_cmod_propagation.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_cmod_propagation.cpp
@@ -93,6 +93,9 @@ opt_cmod_propagation_local(bblock_t *block)
scan_inst->dst.reg_offset != inst->src[0].reg_offset)
break;
+ if (scan_inst->exec_size != inst->exec_size)
+ break;
+
/* CMP's result is the same regardless of dest type. */
if (inst->conditional_mod == BRW_CONDITIONAL_NZ &&
scan_inst->opcode == BRW_OPCODE_CMP &&
--
1.9.1
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