blob: 408809f728048a771d3f53839cb0c3b9d09fb482 (
plain)
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
|
// slang-ir-autodiff-region.h
#pragma once
#include "slang-ir-autodiff.h"
#include "slang-ir-insts.h"
#include "slang-ir.h"
namespace Slang
{
struct IndexedRegion : public RefObject
{
IRLoop* loop;
IndexedRegion* parent;
IndexedRegion(IRLoop* loop, IndexedRegion* parent)
: loop(loop), parent(parent)
{
}
IRBlock* getInitializerBlock() { return as<IRBlock>(loop->getParent()); }
IRBlock* getConditionBlock()
{
auto condBlock = as<IRBlock>(loop->getTargetBlock());
SLANG_RELEASE_ASSERT(as<IRIfElse>(condBlock->getTerminator()));
return condBlock;
}
IRBlock* getBreakBlock() { return loop->getBreakBlock(); }
IRBlock* getUpdateBlock()
{
auto initBlock = getInitializerBlock();
auto condBlock = getConditionBlock();
IRBlock* lastLoopBlock = nullptr;
for (auto predecessor : condBlock->getPredecessors())
{
if (predecessor != initBlock)
lastLoopBlock = predecessor;
}
// Should find atleast one predecessor that is _not_ the
// init block (that contains the loop info). This
// predecessor would be the last block in the loop
// before looping back to the condition.
//
SLANG_RELEASE_ASSERT(lastLoopBlock);
return lastLoopBlock;
}
};
struct IndexedRegionMap : public RefObject
{
Dictionary<IRBlock*, IndexedRegion*> map;
List<RefPtr<IndexedRegion>> regions;
IndexedRegion* newRegion(IRLoop* loop, IndexedRegion* parent)
{
auto region = new IndexedRegion(loop, parent);
regions.add(region);
return region;
}
void mapBlock(IRBlock* block, IndexedRegion* region) { map.add(block, region); }
bool hasMapping(IRBlock* block) { return map.containsKey(block); }
IndexedRegion* getRegion(IRBlock* block) { return map[block]; }
List<IndexedRegion*> getAllAncestorRegions(IRBlock* block)
{
List<IndexedRegion*> regionList;
IndexedRegion* region = getRegion(block);
for (; region; region = region->parent)
regionList.add(region);
return regionList;
}
};
RefPtr<IndexedRegionMap> buildIndexedRegionMap(IRGlobalValueWithCode* func);
}; // namespace Slang
|
