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/**************************************************************************
*
* Copyright 2009 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/**
* LLVM control flow build helpers.
*
* @author Jose Fonseca <jfonseca@vmware.com>
*/
#ifndef LP_BLD_FLOW_H
#define LP_BLD_FLOW_H
#include <llvm-c/Core.h>
struct lp_type;
struct lp_build_flow_context;
struct lp_build_flow_context *
lp_build_flow_create(LLVMBuilderRef builder);
void
lp_build_flow_destroy(struct lp_build_flow_context *flow);
void
lp_build_flow_scope_begin(struct lp_build_flow_context *flow);
void
lp_build_flow_scope_declare(struct lp_build_flow_context *flow,
LLVMValueRef *variable);
void
lp_build_flow_scope_end(struct lp_build_flow_context *flow);
void
lp_build_flow_skip_begin(struct lp_build_flow_context *flow);
void
lp_build_flow_skip_cond_break(struct lp_build_flow_context *flow,
LLVMValueRef cond);
void
lp_build_flow_skip_end(struct lp_build_flow_context *flow);
struct lp_build_mask_context
{
struct lp_build_flow_context *flow;
LLVMTypeRef reg_type;
LLVMValueRef value;
};
void
lp_build_mask_begin(struct lp_build_mask_context *mask,
struct lp_build_flow_context *flow,
struct lp_type type,
LLVMValueRef value);
/**
* Bitwise AND the mask with the given value, if a previous mask was set.
*/
void
lp_build_mask_update(struct lp_build_mask_context *mask,
LLVMValueRef value);
LLVMValueRef
lp_build_mask_end(struct lp_build_mask_context *mask);
/**
* LLVM's IR doesn't represent for-loops directly. Furthermore it
* it requires creating code blocks, branches, phi variables, so it
* requires a fair amount of code.
*
* @sa http://www.llvm.org/docs/tutorial/LangImpl5.html#for
*/
struct lp_build_loop_state
{
LLVMBasicBlockRef block;
LLVMValueRef counter;
};
void
lp_build_loop_begin(LLVMBuilderRef builder,
LLVMValueRef start,
struct lp_build_loop_state *state);
void
lp_build_loop_end(LLVMBuilderRef builder,
LLVMValueRef end,
LLVMValueRef step,
struct lp_build_loop_state *state);
struct lp_build_if_state
{
LLVMBuilderRef builder;
struct lp_build_flow_context *flow;
};
void
lp_build_if(struct lp_build_if_state *ctx,
struct lp_build_flow_context *flow,
LLVMBuilderRef builder,
LLVMValueRef condition);
void
lp_build_else(struct lp_build_if_state *ctx);
void
lp_build_endif(struct lp_build_if_state *ctx);
#endif /* !LP_BLD_FLOW_H */
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