From: Tom Stellard <tstellar@gmail.com>
Date: Tue, 7 Sep 2010 17:22:16 +0000 (-0700)
Subject: r300/compiler: Fix dataflow bug in presub_helper()
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e3fc210a4f93c41cd3d1601dd1c937388f117d97;p=mesa.git

r300/compiler: Fix dataflow bug in presub_helper()
---

diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_optimize.c b/src/mesa/drivers/dri/r300/compiler/radeon_optimize.c
index 53efbba4c56..88aac949a10 100644
--- a/src/mesa/drivers/dri/r300/compiler/radeon_optimize.c
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_optimize.c
@@ -590,6 +590,8 @@ static int presub_helper(
 		if (inst->U.I.DstReg.WriteMask &
 				src_reads_dst_mask(s->Inst->U.I.SrcReg[1],
 							inst->U.I.DstReg)
+				|| src_reads_dst_mask(s->Inst->U.I.SrcReg[0],
+							inst->U.I.DstReg)
 				|| info->IsFlowControl) {
 			cant_sub = 1;
 		}