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radeonsi: avoid sending GS_EMIT in shaders without outputs 

Fixes GPU hangs.

Cc: 18.1 18.2 <mesa-stable@lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107857
Signed-off-by: Józef Kucia <joseph.kucia@gmail.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Józef Kucia 2018-09-24 00:44:00 +02:00 committed by Marek Olšák
parent 08f97407fb
commit e24a4e05c7
1 changed files with 6 additions and 3 deletions
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9
src/gallium/drivers/radeonsi/si_shader.c
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@ -4326,9 +4326,12 @@ static void si_llvm_emit_vertex(struct ac_shader_abi *abi,
gs_next_vertex = LLVMBuildAdd(ctx->ac.builder, gs_next_vertex, ctx->i32_1, "");
LLVMBuildStore(ctx->ac.builder, gs_next_vertex, ctx->gs_next_vertex[stream]);
/* Signal vertex emission */
ac_build_sendmsg(&ctx->ac, AC_SENDMSG_GS_OP_EMIT | AC_SENDMSG_GS | (stream << 8),
si_get_gs_wave_id(ctx));
/* Signal vertex emission if vertex data was written. */
if (offset) {
ac_build_sendmsg(&ctx->ac, AC_SENDMSG_GS_OP_EMIT | AC_SENDMSG_GS | (stream << 8),
si_get_gs_wave_id(ctx));
}
if (!use_kill)
lp_build_endif(&if_state);
}