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i965/vec4: Don't fix-up scalar uniforms for 3 src instructions.

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Removes unnecessary MOV instructions in L4D2, TF2, Dota2, and many other
Steam games.

total instructions in shared programs: 1668126 -> 1657509 (-0.64%)
instructions in affected programs:     242235 -> 231618 (-4.38%)

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Matt Turner 2014-03-08 12:16:13 -08:00
parent b823d5df0f
commit 3330dec90c
1 changed files with 3 additions and 0 deletions
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3
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
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@ -277,6 +277,9 @@ vec4_visitor::fix_3src_operand(src_reg src)
if (src.file != UNIFORM && src.file != IMM)
return src;
if (src.file == UNIFORM && brw_is_single_value_swizzle(src.swizzle))
return src;
dst_reg expanded = dst_reg(this, glsl_type::vec4_type);
expanded.type = src.type;
emit(MOV(expanded, src));