freedreno/ir3: fix crash with samgq workaround
Need to list_delinit() before we clone the instruction to split it into individual samgpN instructions, otherwise we get list corruption. Tested-by: Eduardo Lima Mitev <elima@igalia.com> Signed-off-by: Rob Clark <robdclark@chromium.org> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3989>
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@ -215,13 +215,14 @@ legalize_block(struct ir3_legalize_ctx *ctx, struct ir3_block *block)
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ctx->type == MESA_SHADER_VERTEX && n->opc == OPC_SAMGQ) {
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struct ir3_instruction *samgp;
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list_delinit(&n->node);
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for (i = 0; i < 4; i++) {
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samgp = ir3_instr_clone(n);
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samgp->opc = OPC_SAMGP0 + i;
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if (i > 1)
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samgp->flags |= IR3_INSTR_SY;
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}
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list_delinit(&n->node);
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} else {
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list_addtail(&n->node, &block->instr_list);
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}
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