Mesa (master): i965: Set MaxIfDepth to UINT_MAX on Gen6+ and 16 on prior generations.
Kenneth Graunke
kwg at kemper.freedesktop.org
Fri Oct 21 08:11:31 UTC 2011
Module: Mesa
Branch: master
Commit: 01f9fdc4acd28cc4630a3c71f2d007373f4d979c
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=01f9fdc4acd28cc4630a3c71f2d007373f4d979c
Author: Kenneth Graunke <kenneth at whitecape.org>
Date: Mon Sep 19 23:47:56 2011 -0700
i965: Set MaxIfDepth to UINT_MAX on Gen6+ and 16 on prior generations.
Commit 488fe51cf823ccd137c667f1e92dd86f8323b723 converted the EmitNoIfs
flag to MaxIfDepth, an unsigned integer saying "flatten if-statements
nested beyond this depth."
Unfortunately, i965 left this initialized to 0, which made ir_to_mesa
attempt to flatten all if-statements. We didn't notice right away
because we usually throw away ir_to_mesa's code in favor of the native
VS and FS backends...but this still creates a lot of unnecessary work.
Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
src/mesa/drivers/dri/i965/brw_context.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index c1b274f..95662dc 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -116,6 +116,7 @@ brwCreateContext(int api,
/* We want the GLSL compiler to emit code that uses condition codes */
for (i = 0; i <= MESA_SHADER_FRAGMENT; i++) {
+ ctx->ShaderCompilerOptions[i].MaxIfDepth = intel->gen < 6 ? 16 : UINT_MAX;
ctx->ShaderCompilerOptions[i].EmitCondCodes = true;
ctx->ShaderCompilerOptions[i].EmitNVTempInitialization = true;
ctx->ShaderCompilerOptions[i].EmitNoNoise = true;
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