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r300/compiler: Disable register rename pass on r500

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The scheduler and the register allocator are not good enough yet to deal
with the effects of the register rename pass.  This was causing a 50%
performance drop in Lightsmark.  The pass can be re-enabled once the
scheduler and the register allocator are more mature.  r300 and r400
still need this pass, because it prevents a lot of shaders from using
too many texture indirections.

NOTE: This is a candidate for the 7.10 branch.
This commit is contained in:
Tom Stellard
2011-02-05 22:39:58 -08:00
parent 19202284c0
commit 68b701f5de
1 changed files with 1 additions and 1 deletions
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src/mesa/drivers/dri/r300/compiler/r3xx_fragprog.c
+1 -1
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@@ -124,7 +124,7 @@ void r3xx_compile_fragment_program(struct r300_fragment_program_compiler* c)
/* This pass makes it easier for the scheduler to group TEX
* instructions and reduces the chances of creating too
* many texture indirections.*/
{"register rename", 1, !is_r500 || opt, rc_rename_regs, NULL},
{"register rename", 1, !is_r500, rc_rename_regs, NULL},
{"pair translate", 1, 1, rc_pair_translate, NULL},
{"pair scheduling", 1, 1, rc_pair_schedule, NULL},
{"register allocation", 1, opt, rc_pair_regalloc, NULL},