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freedreno/ir3: don't cp absneg into meta:fi

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If using a fanin (collect) to collect of consecutive registers together,
we can CP mov's into the fanin, but not (abs) or (neg).  No places that
allow those modifiers are consuming a fanin anyways.  But this caused an
absneg to be lost between a ldgb and stgb for shaders like:

  outputs[n] = abs(input[n])

Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Rob Clark 2018-06-04 13:31:47 -04:00
parent 39e7a39e91
commit cf5dda3349
1 changed files with 4 additions and 0 deletions
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4
src/gallium/drivers/freedreno/ir3/ir3_cp.c
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@ -543,6 +543,10 @@ instr_cp(struct ir3_cp_ctx *ctx, struct ir3_instruction *instr)
if (reg->flags & IR3_REG_ARRAY)
continue;
/* Don't CP absneg into meta instructions, that won't end well: */
if (is_meta(instr) && (src->opc != OPC_MOV))
continue;
reg_cp(ctx, instr, reg, n);
}