LLVM: lib/Target/BPF/BPFIRPeephole.cpp Source File (original) (raw)
1
2
3
4
5
6
7
8
9
10
11
12
13
22
23#define DEBUG_TYPE "bpf-ir-peephole"
24
25using namespace llvm;
26
27namespace {
28
29static bool BPFIRPeepholeImpl(Function &F) {
30 LLVM_DEBUG(dbgs() << "******** BPF IR Peephole ********\n");
31
34 for (auto &BB : F) {
35 for (auto &I : BB) {
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53 if (ToErase) {
55 ToErase = nullptr;
56 }
57
59 if (II->getIntrinsicID() != Intrinsic::stacksave)
60 continue;
61 if (->hasOneUser())
62 continue;
67 Inst->eraseFromParent();
68 ToErase = &I;
69 continue;
70 }
71
73 if (!LD->hasOneUser())
74 continue;
76 if ()
77 continue;
78 if (II->getIntrinsicID() != Intrinsic::stackrestore)
79 continue;
83 II->eraseFromParent();
84 ToErase = &I;
85 }
86 }
87 }
88
90}
91}
92
This header defines various interfaces for pass management in LLVM.
uint64_t IntrinsicInst * II
PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM)
Definition BPFIRPeephole.cpp:93
LLVM_ABI InstListType::iterator eraseFromParent()
This method unlinks 'this' from the containing basic block and deletes it.
A set of analyses that are preserved following a run of a transformation pass.
static PreservedAnalyses none()
Convenience factory function for the empty preserved set.
static PreservedAnalyses all()
Construct a special preserved set that preserves all passes.
This is an optimization pass for GlobalISel generic memory operations.
decltype(auto) dyn_cast(const From &Val)
dyn_cast - Return the argument parameter cast to the specified type.
LLVM_ABI raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
decltype(auto) cast(const From &Val)
cast - Return the argument parameter cast to the specified type.
AnalysisManager< Function > FunctionAnalysisManager
Convenience typedef for the Function analysis manager.