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freedreno/ir3: insert mov if same instruction in the outputs.

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For example,

    result0 = texture(sampler[indexBase + 5], coords);
    result1 = texture(sampler[indexBase + 0], coords);
    result2 = texture(sampler[indexBase + 0], coords);
    out_result0 = result0;
    out_result1 = result1;
    out_result2 = result2;

In this kind of case we need to insert an extra mov to the outputs
so that the result could be assigned to each register respectively.

Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Hyunjun Ko 2018-08-30 11:58:54 +09:00 • committed by Rob Clark
parent b4da2f6667
commit 2454742a84
1 changed files with 14 additions and 0 deletions
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14
src/gallium/drivers/freedreno/ir3/ir3_compiler_nir.c
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@ -3679,6 +3679,20 @@ ir3_compile_shader_nir(struct ir3_compiler *compiler,
ir3_cp(ir, so);
/* Insert mov if there's same instruction for each output.
* eg. dEQP-GLES31.functional.shaders.opaque_type_indexing.sampler.const_expression.vertex.sampler2dshadow
*/
for (int i = ir->noutputs - 1; i >= 0; i--) {
if (!ir->outputs[i])
continue;
for (unsigned j = 0; j < i; j++) {
if (ir->outputs[i] == ir->outputs[j]) {
ir->outputs[i] =
ir3_MOV(ir->outputs[i]->block, ir->outputs[i], TYPE_F32);
}
}
}
if (fd_mesa_debug & FD_DBG_OPTMSGS) {
printf("BEFORE GROUPING:\n");
ir3_print(ir);