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
|
/**************************************************************************
*
* 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>
*/
#include "lp_bld_flow.h"
void
lp_build_loop_begin(LLVMBuilderRef builder,
LLVMValueRef start,
struct lp_build_loop_state *state)
{
LLVMBasicBlockRef block = LLVMGetInsertBlock(builder);
LLVMValueRef function = LLVMGetBasicBlockParent(block);
state->block = LLVMAppendBasicBlock(function, "loop");
LLVMBuildBr(builder, state->block);
LLVMPositionBuilderAtEnd(builder, state->block);
state->counter = LLVMBuildPhi(builder, LLVMTypeOf(start), "");
LLVMAddIncoming(state->counter, &start, &block, 1);
}
void
lp_build_loop_end(LLVMBuilderRef builder,
LLVMValueRef end,
LLVMValueRef step,
struct lp_build_loop_state *state)
{
LLVMBasicBlockRef block = LLVMGetInsertBlock(builder);
LLVMValueRef function = LLVMGetBasicBlockParent(block);
LLVMValueRef next;
LLVMValueRef cond;
LLVMBasicBlockRef after_block;
if (!step)
step = LLVMConstInt(LLVMTypeOf(end), 1, 0);
next = LLVMBuildAdd(builder, state->counter, step, "");
cond = LLVMBuildICmp(builder, LLVMIntNE, next, end, "");
after_block = LLVMAppendBasicBlock(function, "");
LLVMBuildCondBr(builder, cond, after_block, state->block);
LLVMAddIncoming(state->counter, &next, &block, 1);
LLVMPositionBuilderAtEnd(builder, after_block);
}
|
