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intel/fs: Add need_dest parameter to fs_visitor::nir_emit_alu

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This is the same as the need_dest parameter to
prepare_alu_destination_and_sources.  This allows us to not change the
register that is expected to hold an result if an instruction is
re-emitted.  This is particularly a problem if the re-emitted
instruction is a partial write.  A later patch will use this feature.

No shader-db changes on any Intel platform.

v2: Don't do the Boolean resolve when there is no destination.  If the
ALU instruction didn't write a register, there's nothing to resolve.
This replaces an earlier patch "intel/fs: Allocate dummy destination
register when need_dest is false".

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Ian Romanick
2019-05-21 12:09:42 -07:00
parent e13a5c7d67
commit a288708506
2 changed files with 7 additions and 4 deletions
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3
src/intel/compiler/brw_fs.h
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@@ -206,7 +206,8 @@ public:
void nir_emit_loop(nir_loop *loop);
void nir_emit_block(nir_block *block);
void nir_emit_instr(nir_instr *instr);
void nir_emit_alu(const brw::fs_builder &bld, nir_alu_instr *instr);
void nir_emit_alu(const brw::fs_builder &bld, nir_alu_instr *instr,
bool need_dest);
bool try_emit_b2fi_of_inot(const brw::fs_builder &bld, fs_reg result,
nir_alu_instr *instr);
void nir_emit_load_const(const brw::fs_builder &bld,