ac/nir,radeonsi: add ac_shader_abi::front_face

v2: update for LLVMValueRefs in ac_shader_abi

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

3 files changed, 15 insertions, 7 deletions

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index 9a88bbc346..a089d69a84 100644
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -132,7 +132,6 @@ struct nir_to_llvm_context {
 	LLVMValueRef sample_pos_offset;
 	LLVMValueRef persp_sample, persp_center, persp_centroid;
 	LLVMValueRef linear_sample, linear_center, linear_centroid;
-	LLVMValueRef front_face;
 	LLVMValueRef ancillary;
 	LLVMValueRef sample_coverage;
 	LLVMValueRef frag_pos[4];
@@ -816,7 +815,7 @@ static void create_function(struct nir_to_llvm_context *ctx)
 		add_vgpr_argument(&args, ctx->f32, &ctx->frag_pos[1]);  /* pos y float */
 		add_vgpr_argument(&args, ctx->f32, &ctx->frag_pos[2]);  /* pos z float */
 		add_vgpr_argument(&args, ctx->f32, &ctx->frag_pos[3]);  /* pos w float */
-		add_vgpr_argument(&args, ctx->i32, &ctx->front_face);  /* front face */
+		add_vgpr_argument(&args, ctx->i32, &ctx->abi.front_face);  /* front face */
 		add_vgpr_argument(&args, ctx->i32, &ctx->ancillary);  /* ancillary */
 		add_vgpr_argument(&args, ctx->i32, &ctx->sample_coverage);  /* sample coverage */
 		add_vgpr_argument(&args, ctx->i32, NULL);  /* fixed pt */
@@ -4023,7 +4022,7 @@ static void visit_intrinsic(struct ac_nir_context *ctx,
 		result = ctx->nctx->sample_coverage;
 		break;
 	case nir_intrinsic_load_front_face:
-		result = ctx->nctx->front_face;
+		result = ctx->abi->front_face;
 		break;
 	case nir_intrinsic_load_instance_id:
 		result = ctx->abi->instance_id;
diff --git a/src/amd/common/ac_shader_abi.h b/src/amd/common/ac_shader_abi.h
index efbd7de460..1c8d0e8b3a 100644
--- a/src/amd/common/ac_shader_abi.h
+++ b/src/amd/common/ac_shader_abi.h
@@ -44,6 +44,7 @@ struct ac_shader_abi {
 	LLVMValueRef draw_id;
 	LLVMValueRef vertex_id;
 	LLVMValueRef instance_id;
+	LLVMValueRef front_face;
 
 	/* For VS and PS: pre-loaded shader inputs.
 	 *
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index 6b55e7f4f6..2827b9d06a 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -150,12 +150,19 @@ static unsigned add_arg(struct si_function_info *fninfo,
 	return add_arg_assign(fninfo, regfile, type, NULL);
 }
 
+static void add_arg_assign_checked(struct si_function_info *fninfo,
+				   enum si_arg_regfile regfile, LLVMTypeRef type,
+				   LLVMValueRef *assign, unsigned idx)
+{
+	MAYBE_UNUSED unsigned actual = add_arg_assign(fninfo, regfile, type, assign);
+	assert(actual == idx);
+}
+
 static void add_arg_checked(struct si_function_info *fninfo,
 			    enum si_arg_regfile regfile, LLVMTypeRef type,
 			    unsigned idx)
 {
-	MAYBE_UNUSED unsigned actual = add_arg(fninfo, regfile, type);
-	assert(actual == idx);
+	add_arg_assign_checked(fninfo, regfile, type, NULL, idx);
 }
 
 /**
@@ -1563,7 +1570,7 @@ static void declare_system_value(struct si_shader_context *ctx,
 	}
 
 	case TGSI_SEMANTIC_FACE:
-		value = LLVMGetParam(ctx->main_fn, SI_PARAM_FRONT_FACE);
+		value = ctx->abi.front_face;
 		break;
 
 	case TGSI_SEMANTIC_SAMPLEID:
@@ -4531,7 +4538,8 @@ static void create_function(struct si_shader_context *ctx)
 		add_arg_checked(&fninfo, ARG_VGPR, ctx->f32, SI_PARAM_POS_Y_FLOAT);
 		add_arg_checked(&fninfo, ARG_VGPR, ctx->f32, SI_PARAM_POS_Z_FLOAT);
 		add_arg_checked(&fninfo, ARG_VGPR, ctx->f32, SI_PARAM_POS_W_FLOAT);
-		add_arg_checked(&fninfo, ARG_VGPR, ctx->i32, SI_PARAM_FRONT_FACE);
+		add_arg_assign_checked(&fninfo, ARG_VGPR, ctx->i32,
+				       &ctx->abi.front_face, SI_PARAM_FRONT_FACE);
 		shader->info.face_vgpr_index = 20;
 		add_arg_checked(&fninfo, ARG_VGPR, ctx->i32, SI_PARAM_ANCILLARY);
 		add_arg_checked(&fninfo, ARG_VGPR, ctx->f32, SI_PARAM_SAMPLE_COVERAGE);