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i965: Bail on vec4 copy propagation for scratch writes with source modifiers

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Fixes Khronos GLES3 CTS test:
dynamic_expression_array_access_vertex

Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Anuj Phogat 2014-07-28 15:41:55 -07:00
parent 2b837576eb
commit 7c1ea00eaf
1 changed files with 4 additions and 0 deletions
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4
src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp
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@ -273,6 +273,10 @@ try_copy_propagate(struct brw_context *brw, vec4_instruction *inst,
if (has_source_modifiers && value.type != inst->src[arg].type)
return false;
if (has_source_modifiers &&
inst->opcode == SHADER_OPCODE_GEN4_SCRATCH_WRITE)
return false;
bool is_3src_inst = (inst->opcode == BRW_OPCODE_LRP ||
inst->opcode == BRW_OPCODE_MAD ||
inst->opcode == BRW_OPCODE_BFE ||