Module: Mesa Branch: master Commit: cee29220e312f7c76a07343e501fa6a1c5f3d1aa URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=cee29220e312f7c76a07343e501fa6a1c5f3d1aa
Author: Jason Ekstrand <[email protected]> Date: Wed Sep 9 15:58:25 2015 -0700 nir: Add a function for rewriting instruction destinations Reviewed-by: Eduardo Lima Mitev <[email protected]> --- src/glsl/nir/nir.c | 24 ++++++++++++++++++++++++ src/glsl/nir/nir.h | 2 ++ 2 files changed, 26 insertions(+) diff --git a/src/glsl/nir/nir.c b/src/glsl/nir/nir.c index 4a88cd1..aafcb93 100644 --- a/src/glsl/nir/nir.c +++ b/src/glsl/nir/nir.c @@ -1178,6 +1178,30 @@ nir_if_rewrite_condition(nir_if *if_stmt, nir_src new_src) } void +nir_instr_rewrite_dest(nir_instr *instr, nir_dest *dest, nir_dest new_dest) +{ + if (dest->is_ssa) { + /* We can only overwrite an SSA destination if it has no uses. */ + assert(list_empty(&dest->ssa.uses) && list_empty(&dest->ssa.if_uses)); + } else { + list_del(&dest->reg.def_link); + if (dest->reg.indirect) + src_remove_all_uses(dest->reg.indirect); + } + + /* We can't re-write with an SSA def */ + assert(!new_dest.is_ssa); + + nir_dest_copy(dest, &new_dest, instr); + + dest->reg.parent_instr = instr; + list_addtail(&dest->reg.def_link, &new_dest.reg.reg->defs); + + if (dest->reg.indirect) + src_add_all_uses(dest->reg.indirect, instr, NULL); +} + +void nir_ssa_def_init(nir_instr *instr, nir_ssa_def *def, unsigned num_components, const char *name) { diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h index 05cc42c..3f693b1 100644 --- a/src/glsl/nir/nir.h +++ b/src/glsl/nir/nir.h @@ -1735,6 +1735,8 @@ bool nir_srcs_equal(nir_src src1, nir_src src2); void nir_instr_rewrite_src(nir_instr *instr, nir_src *src, nir_src new_src); void nir_instr_move_src(nir_instr *dest_instr, nir_src *dest, nir_src *src); void nir_if_rewrite_condition(nir_if *if_stmt, nir_src new_src); +void nir_instr_rewrite_dest(nir_instr *instr, nir_dest *dest, + nir_dest new_dest); void nir_ssa_dest_init(nir_instr *instr, nir_dest *dest, unsigned num_components, const char *name); _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
