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ac/llvm: skip ballot zext for 32-bit dest with wave32-as-wave64

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NGG lowering can ballots with a 32-bit destination even if the ballot bit
size is 64.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Cc: mesa-stable
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24140>
(cherry picked from commit 0cb26f31fe)
This commit is contained in:
Rhys Perry 2023-07-13 16:37:11 +01:00 • committed by Dylan Baker
parent fae833ec0e
commit 9b0da6c5ad
2 changed files with 5 additions and 3 deletions
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2
.pick_status.json
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@ -224,7 +224,7 @@
"description": "ac/llvm: skip ballot zext for 32-bit dest with wave32-as-wave64",
"nominated": true,
"nomination_type": 0,
"resolution": 0,
"resolution": 1,
"main_sha": null,
"because_sha": null,
"notes": null

6
src/amd/llvm/ac_nir_to_llvm.c
View file

@ -3055,8 +3055,10 @@ static bool visit_intrinsic(struct ac_nir_context *ctx, nir_intrinsic_instr *ins
switch (instr->intrinsic) {
case nir_intrinsic_ballot:
result = ac_build_ballot(&ctx->ac, get_src(ctx, instr->src[0]));
if (ctx->ac.ballot_mask_bits > ctx->ac.wave_size)
result = LLVMBuildZExt(ctx->ac.builder, result, ctx->ac.iN_ballotmask, "");
if (instr->dest.ssa.bit_size > ctx->ac.wave_size) {
LLVMTypeRef dest_type = LLVMIntTypeInContext(ctx->ac.context, instr->dest.ssa.bit_size);
result = LLVMBuildZExt(ctx->ac.builder, result, dest_type, "");
}
break;
case nir_intrinsic_read_invocation:
result =