From: Tom Stellard <tstellar@gmail.com>
Date: Sat, 19 Jun 2010 03:42:33 +0000 (-0700)
Subject: r300/compiler: Don't continue copy propagation inside loops.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0dbdcb43215c13dd7d7f83c1f1cdbfe6706109f0;p=mesa.git

r300/compiler: Don't continue copy propagation inside loops.
---

diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_optimize.c b/src/mesa/drivers/dri/r300/compiler/radeon_optimize.c
index e760b59bd41..eca06515367 100644
--- a/src/mesa/drivers/dri/r300/compiler/radeon_optimize.c
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_optimize.c
@@ -162,6 +162,11 @@ static void peephole(struct radeon_compiler * c, struct rc_instruction * inst_mo
 	for(struct rc_instruction * inst = inst_mov->Next;
 	    inst != &c->Program.Instructions;
 	    inst = inst->Next) {
+		/* XXX In the future we might be able to make the optimizer
+		 * smart enough to handle loops. */
+		if(inst->U.I.Opcode == RC_OPCODE_BGNLOOP){
+			return;
+		}
 		rc_for_all_reads_mask(inst, peephole_scan_read, &s);
 		rc_for_all_writes_mask(inst, peephole_scan_write, &s);
 		if (s.Conflict)