From: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Date: Tue, 24 Apr 2018 22:45:33 +0000 (+0200)
Subject: ac/nir: Implement the deref instr for shared memory.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4a888beea9f00f0de8adf2cfff02fc160140113a;p=mesa.git

ac/nir: Implement the deref instr for shared memory.

v2: Store the result in ctx->ssa_defs.
Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Acked-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
---

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index b77d62a39b0..38797231663 100644
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -3583,6 +3583,34 @@ static void visit_jump(struct ac_llvm_context *ctx,
 	}
 }
 
+static void visit_deref(struct ac_nir_context *ctx,
+                        nir_deref_instr *instr)
+{
+	if (instr->mode != nir_var_shared)
+		return;
+
+	LLVMValueRef result = NULL;
+	switch(instr->deref_type) {
+	case nir_deref_type_var: {
+		struct hash_entry *entry = _mesa_hash_table_search(ctx->vars, instr->var);
+		result = entry->data;
+		break;
+	}
+	case nir_deref_type_struct:
+		result = ac_build_gep0(&ctx->ac, get_src(ctx, instr->parent),
+		                       LLVMConstInt(ctx->ac.i32, instr->strct.index, 0));
+		break;
+	case nir_deref_type_array:
+		result = ac_build_gep0(&ctx->ac, get_src(ctx, instr->parent),
+		                       get_src(ctx, instr->arr.index));
+		break;
+	default:
+		unreachable("Unhandled deref_instr deref type");
+	}
+
+	ctx->ssa_defs[instr->dest.ssa.index] = result;
+}
+
 static void visit_cf_list(struct ac_nir_context *ctx,
                           struct exec_list *list);
 
@@ -3613,6 +3641,9 @@ static void visit_block(struct ac_nir_context *ctx, nir_block *block)
 		case nir_instr_type_jump:
 			visit_jump(&ctx->ac, nir_instr_as_jump(instr));
 			break;
+		case nir_instr_type_deref:
+			visit_deref(ctx, nir_instr_as_deref(instr));
+			break;
 		default:
 			fprintf(stderr, "Unknown NIR instr type: ");
 			nir_print_instr(instr, stderr);