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nir/lower_io: Use b2b for shader and function temporaries 

This way we can avoid some unnecessary conversions because there's no
need to sanitize to 0/1 for scratch.

Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5927>
This commit is contained in:
Jason Ekstrand 2020-07-15 14:09:06 -05:00 committed by Marge Bot
parent 3a2975db98
commit 4815ae51d7
1 changed files with 6 additions and 2 deletions
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8
src/compiler/nir/nir_lower_io.c
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@ -920,7 +920,9 @@ build_explicit_io_load(nir_builder *b, nir_intrinsic_instr *intrin,
* standard encoding for booleans rather than forcing a 0/1 boolean.
* This should save an instruction or two.
*/
if (mode == nir_var_mem_shared)
if (mode == nir_var_mem_shared ||
mode == nir_var_shader_temp ||
mode == nir_var_function_temp)
result = nir_b2b1(b, result);
else
result = nir_i2b(b, result);
@ -970,7 +972,9 @@ build_explicit_io_store(nir_builder *b, nir_intrinsic_instr *intrin,
*
* TODO: Make the native bool bit_size an option.
*/
if (mode == nir_var_mem_shared)
if (mode == nir_var_mem_shared ||
mode == nir_var_shader_temp ||
mode == nir_var_function_temp)
value = nir_b2b32(b, value);
else
value = nir_b2i(b, value, 32);