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r300: allow copy propagate of RC_FILE_NONE reads to TEX instructions

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Texturing instructions can't read from constant sources, however this
can work when the constant was transformed to constant swizzles and
hence RC_FILE_NONE.

Prevents a regression in single Unigine Tropics shader that uses
constant (0.5,0.5) as a TEX coordinate in a next patch. We now
convert to constant swizzles twice, first when translating from TGSI
and than in constant folding. If we disable the first conversion
rc_transform_tex will emit a mov from constant to temporary. With this
patch, copy propagate will clean it up later.

Signed-off-by: Pavel Ondračka <pavel.ondracka@gmail.com>
Reviewed-by: Filip Gawin <filip@gawin.net>
Tested-by: Filip Gawin <filip@gawin.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20484>
This commit is contained in:
Pavel Ondračka 2023-01-02 17:17:17 +01:00 • committed by Marge Bot
parent d869f0f7ca
commit 7decc7efba
1 changed files with 1 additions and 0 deletions
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src/gallium/drivers/r300/compiler/radeon_optimize.c
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@ -107,6 +107,7 @@ static void copy_propagate_scan_read(void * data, struct rc_instruction * inst,
*/
if(reader_data->Writer->U.I.SrcReg[0].File != RC_FILE_TEMPORARY &&
reader_data->Writer->U.I.SrcReg[0].File != RC_FILE_INPUT &&
reader_data->Writer->U.I.SrcReg[0].File != RC_FILE_NONE &&
(inst->U.I.Opcode == RC_OPCODE_TEX ||
inst->U.I.Opcode == RC_OPCODE_TXB ||
inst->U.I.Opcode == RC_OPCODE_TXP ||