From: Marek Olšák <maraeo@gmail.com>
Date: Tue, 4 Jan 2011 20:54:23 +0000 (+0100)
Subject: r300/compiler: disable the rename_regs pass for loops
X-Git-Url: https://git.libre-soc.org/?p=mesa.git;a=commitdiff_plain;h=8543902bfbdfc15c39525bd99bee22e2f2126e74

r300/compiler: disable the rename_regs pass for loops

This workaround fixes rendering of kwin thumbnails.

NOTE: This is a candidate for the 7.9 and 7.10 branches.
---

diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_rename_regs.c b/src/mesa/drivers/dri/r300/compiler/radeon_rename_regs.c
index 88165f78953..5bd19c0b9c6 100644
--- a/src/mesa/drivers/dri/r300/compiler/radeon_rename_regs.c
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_rename_regs.c
@@ -51,6 +51,14 @@ void rc_rename_regs(struct radeon_compiler *c, void *user)
 	struct rc_reader_data reader_data;
 	unsigned char * used;
 
+	/* XXX Remove this once the register allocation works with flow control. */
+	for(inst = c->Program.Instructions.Next;
+					inst != &c->Program.Instructions;
+					inst = inst->Next) {
+		if (inst->U.I.Opcode == RC_OPCODE_BGNLOOP)
+			return;
+	}
+
 	used_length = 2 * rc_recompute_ips(c);
 	used = memory_pool_malloc(&c->Pool, sizeof(unsigned char) * used_length);
 	memset(used, 0, sizeof(unsigned char) * used_length);