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aco/ra: fix get_reg_for_operand() in case of stride mismatches

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We have to clear the register file from the previous operand
as otherwise, there might be no space left.

Totals from 5 (0.00% of 134572) affected shaders: (GFX10.3)
CodeSize: 21144 -> 21000 (-0.68%); split: -0.72%, +0.04%
Instrs: 3738 -> 3720 (-0.48%); split: -0.51%, +0.03%
Latency: 517229 -> 516319 (-0.18%); split: -0.18%, +0.00%
InvThroughput: 49068 -> 48902 (-0.34%); split: -0.38%, +0.04%
Copies: 501 -> 483 (-3.59%); split: -3.79%, +0.20%

Cc: mesa-stable
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14279>
This commit is contained in:
Daniel Schürmann 2021-12-21 12:17:24 +01:00 • committed by Marge Bot
parent 664810ebb0
commit d36a43598c
1 changed files with 2 additions and 3 deletions
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5
src/amd/compiler/aco_register_allocation.cpp
View file

@ -1934,10 +1934,9 @@ get_reg_for_operand(ra_ctx& ctx, RegisterFile& register_file,
dst = operand.physReg();
} else {
/* clear the operand in case it's only a stride mismatch */
register_file.clear(src, operand.regClass());
dst = get_reg(ctx, register_file, operand.getTemp(), parallelcopy, instr, operand_index);
update_renames(
ctx, register_file, parallelcopy, instr,
instr->opcode != aco_opcode::p_create_vector ? rename_not_killed_ops : (UpdateRenames)0);
}
Operand pc_op = operand;