Mesa (7.10): r300/compiler: disable the rename_regs pass for loops

[Marek Olšák]

Module: Mesa
Branch: 7.10
Commit: 14950c50e159f249bbf761821b5a73c530eba333
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=14950c50e159f249bbf761821b5a73c530eba333

Author: Marek Olšák <maraeo at gmail.com>
Date:   Tue Jan  4 21:54:23 2011 +0100

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.
(cherry picked from commit 8543902bfbdfc15c39525bd99bee22e2f2126e74)

---

 .../drivers/dri/r300/compiler/radeon_rename_regs.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

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 88165f7..5bd19c0 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);