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gallium/ttn: don't upset nir_validate w/ BRK's

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Previously we were unconditionally doing ttn_get_src() even for
instructions with no src's.  Which created a lot of unnecessary
load_const instructions.  These were mostly harmless since NIR opt
passes would strip them back out.  But for an ENDIF following a
BRK, it would result in load_const instructions created after the
NIR break instruction.  Which nir_validate dislikes.

But we can actually just dtrt by using NumSrcRegs instead.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Rob Clark 2015-06-26 14:24:08 -04:00
parent d1f0e01979
commit 879dcf07f6
1 changed files with 1 additions and 1 deletions
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2
src/gallium/auxiliary/nir/tgsi_to_nir.c
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@ -1491,7 +1491,7 @@ ttn_emit_instruction(struct ttn_compile *c)
return;
nir_ssa_def *src[TGSI_FULL_MAX_SRC_REGISTERS];
for (i = 0; i < TGSI_FULL_MAX_SRC_REGISTERS; i++) {
for (i = 0; i < tgsi_inst->Instruction.NumSrcRegs; i++) {
src[i] = ttn_get_src(c, &tgsi_inst->Src[i]);
}
nir_alu_dest dest = ttn_get_dest(c, tgsi_dst);