1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/**************************************************************************
*
* 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"
#ifdef __cplusplus
extern "C" {
#endif
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_force_set_counter(struct lp_build_loop_state *state,
LLVMValueRef end);
void
lp_build_loop_force_reload_counter(struct lp_build_loop_state *state);
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_alloca_undef(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);
#ifdef __cplusplus
}
#endif
#endif /* !LP_BLD_FLOW_H */
|
