From: Christian König <deathsimple@vodafone.de>
Date: Fri, 17 Dec 2010 23:45:59 +0000 (+0100)
Subject: r600g: optimize away CF ALU instructions even if type doesn't match
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=120a558624b46578412c945eb4b6005be020445c;p=mesa.git

r600g: optimize away CF ALU instructions even if type doesn't match
---

diff --git a/src/gallium/drivers/r600/r600_asm.c b/src/gallium/drivers/r600/r600_asm.c
index 1d951a12de6..e792168a679 100644
--- a/src/gallium/drivers/r600/r600_asm.c
+++ b/src/gallium/drivers/r600/r600_asm.c
@@ -421,16 +421,29 @@ int r600_bc_add_alu_type(struct r600_bc *bc, const struct r600_bc_alu *alu, int
 	memcpy(nalu, alu, sizeof(struct r600_bc_alu));
 	nalu->nliteral = 0;
 
+	if (bc->cf_last != NULL && bc->cf_last->inst != (type << 3)) {
+		/* check if we could add it anyway */
+		if (bc->cf_last->inst == (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU << 3) &&
+			type == V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_PUSH_BEFORE) {
+			LIST_FOR_EACH_ENTRY(alu, &bc->cf_last->alu, list) {
+				if (alu->predicate) {
+					bc->force_add_cf = 1;
+					break;
+				}
+			}
+		} else
+			bc->force_add_cf = 1;
+	}
+
 	/* cf can contains only alu or only vtx or only tex */
-	if (bc->cf_last == NULL || bc->cf_last->inst != (type << 3) ||
-		bc->force_add_cf) {
+	if (bc->cf_last == NULL || bc->force_add_cf) {
 		r = r600_bc_add_cf(bc);
 		if (r) {
 			free(nalu);
 			return r;
 		}
-		bc->cf_last->inst = (type << 3);
 	}
+	bc->cf_last->inst = (type << 3);
 	if (!bc->cf_last->curr_bs_head) {
 		bc->cf_last->curr_bs_head = nalu;
 		LIST_INITHEAD(&nalu->bs_list);