| /************************************************************************** |
| * |
| * 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 "gallivm/lp_bld.h" |
| |
| |
| struct lp_type; |
| |
| |
| /** |
| * Early exit. Useful to skip to the end of a function or block when |
| * the execution mask becomes zero or when there is an error condition. |
| */ |
| struct lp_build_skip_context |
| { |
| struct gallivm_state *gallivm; |
| |
| /** Block to skip to */ |
| LLVMBasicBlockRef block; |
| }; |
| |
| void |
| lp_build_flow_skip_begin(struct lp_build_skip_context *ctx, |
| struct gallivm_state *gallivm); |
| |
| void |
| lp_build_flow_skip_cond_break(struct lp_build_skip_context *ctx, |
| LLVMValueRef cond); |
| |
| void |
| lp_build_flow_skip_end(struct lp_build_skip_context *ctx); |
| |
| |
| struct lp_build_mask_context |
| { |
| struct lp_build_skip_context skip; |
| |
| LLVMTypeRef reg_type; |
| |
| LLVMValueRef var; |
| }; |
| |
| |
| void |
| lp_build_mask_begin(struct lp_build_mask_context *mask, |
| struct gallivm_state *gallivm, |
| struct lp_type type, |
| LLVMValueRef value); |
| |
| LLVMValueRef |
| lp_build_mask_value(struct lp_build_mask_context *mask); |
| |
| /** |
| * 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); |
| |
| void |
| lp_build_mask_check(struct lp_build_mask_context *mask); |
| |
| 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_var; |
| LLVMValueRef counter; |
| struct gallivm_state *gallivm; |
| }; |
| |
| |
| void |
| lp_build_loop_begin(struct lp_build_loop_state *state, |
| struct gallivm_state *gallivm, |
| LLVMValueRef start); |
| |
| void |
| lp_build_loop_end(struct lp_build_loop_state *state, |
| LLVMValueRef end, |
| LLVMValueRef step); |
| |
| void |
| lp_build_loop_end_cond(struct lp_build_loop_state *state, |
| LLVMValueRef end, |
| LLVMValueRef step, |
| LLVMIntPredicate cond); |
| |
| |
| /** |
| * Implementation of simple C-style for loops |
| */ |
| struct lp_build_for_loop_state |
| { |
| LLVMBasicBlockRef begin; |
| LLVMBasicBlockRef body; |
| LLVMBasicBlockRef exit; |
| LLVMValueRef counter_var; |
| LLVMValueRef counter; |
| LLVMValueRef step; |
| LLVMIntPredicate cond; |
| LLVMValueRef end; |
| struct gallivm_state *gallivm; |
| }; |
| |
| void |
| lp_build_for_loop_begin(struct lp_build_for_loop_state *state, |
| struct gallivm_state *gallivm, |
| LLVMValueRef start, |
| LLVMIntPredicate llvm_cond, |
| LLVMValueRef end, |
| LLVMValueRef step); |
| |
| void |
| lp_build_for_loop_end(struct lp_build_for_loop_state *state); |
| |
| |
| /** |
| * if/else/endif. |
| */ |
| struct lp_build_if_state |
| { |
| struct gallivm_state *gallivm; |
| LLVMValueRef condition; |
| LLVMBasicBlockRef entry_block; |
| LLVMBasicBlockRef true_block; |
| LLVMBasicBlockRef false_block; |
| LLVMBasicBlockRef merge_block; |
| }; |
| |
| |
| void |
| lp_build_if(struct lp_build_if_state *ctx, |
| struct gallivm_state *gallivm, |
| LLVMValueRef condition); |
| |
| void |
| lp_build_else(struct lp_build_if_state *ctx); |
| |
| void |
| lp_build_endif(struct lp_build_if_state *ctx); |
| |
| LLVMBasicBlockRef |
| lp_build_insert_new_block(struct gallivm_state *gallivm, const char *name); |
| |
| LLVMValueRef |
| lp_build_alloca(struct gallivm_state *gallivm, |
| LLVMTypeRef type, |
| const char *name); |
| |
| LLVMValueRef |
| lp_build_array_alloca(struct gallivm_state *gallivm, |
| LLVMTypeRef type, |
| LLVMValueRef count, |
| const char *name); |
| |
| #endif /* !LP_BLD_FLOW_H */ |