lib/Transforms/NaCl/ExpandInsertExtractElement.cpp - Issue 1692803002: Remove Emscripten support

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Issue 1692803002: Remove Emscripten support (Closed) Base URL: https://chromium.googlesource.com/a/native_client/pnacl-llvm.git@master

Patch Set: Created 4 years, 10 months ago

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1 //==- ExpandInsertExtractElement.cpp - Expand vector insert and extract -=//

2 //

3 // The LLVM Compiler Infrastructure

4 //

5 // This file is distributed under the University of Illinois Open Source

6 // License. See LICENSE.TXT for details.

7 //

8 //===------------------------------------------------------------------===//

9 //

10 // This pass expands insertelement and extractelement instructions with

11 // variable indices, which SIMD.js doesn't natively support yet.

12 //

13 //===------------------------------------------------------------------===//

14

15 #include "llvm/ADT/SmallVector.h"

16 #include "llvm/IR/Function.h"

17 #include "llvm/IR/IRBuilder.h"

18 #include "llvm/IR/InstIterator.h"

19 #include "llvm/IR/Instructions.h"

20 #include "llvm/IR/Module.h"

21 #include "llvm/Pass.h"

22 #include "llvm/Transforms/NaCl.h"

23 #include "llvm/Transforms/Utils/Local.h"

24 #include <map>

25 #include <vector>

26

27 #include "llvm/Support/raw_ostream.h"

28

29 #ifdef NDEBUG

30 #undef assert

31 #define assert(x) { if (!(x)) report_fatal_error(#x); }

32 #endif

33

34 using namespace llvm;

35

36 namespace {

37

38 class ExpandInsertExtractElement : public FunctionPass {

39 bool Changed;

40

41 public:

42 static char ID;

43 ExpandInsertExtractElement() : FunctionPass(ID) {

44 initializeExpandInsertExtractElementPass(*PassRegistry::getPassRegistry()) ;

45 }

46

47 virtual bool runOnFunction(Function &F);

48 };

49 }

50

51 char ExpandInsertExtractElement::ID = 0;

52 INITIALIZE_PASS(ExpandInsertExtractElement, "expand-insert-extract-elements",

53 "Expand and lower insert and extract element operations",

54 false, false)

55

56 // Utilities

57

58 bool ExpandInsertExtractElement::runOnFunction(Function &F) {

59 Changed = false;

60

61 Instruction *Entry = F.getEntryBlock().begin();

62 Type *Int32 = Type::getInt32Ty(F.getContext());

63 Constant *Zero = ConstantInt::get(Int32, 0);

64 for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ) {

65 Instruction Inst = &I++;

66

67 if (InsertElementInst *III = dyn_cast<InsertElementInst>(Inst)) {

68 if (isa<ConstantInt>(III->getOperand(2)))

69 continue;

70

71 Type *AllocaTy = III->getType();

72 Instruction *A = new AllocaInst(AllocaTy, 0, "", Entry);

73 CopyDebug(new StoreInst(III->getOperand(0), A, III), III);

74

75 Value *Idxs[] = { Zero, III->getOperand(2) };

76 Instruction *B = CopyDebug(

77 GetElementPtrInst::Create(AllocaTy, A, Idxs, "", III), III);

78 CopyDebug(new StoreInst(III->getOperand(1), B, III), III);

79

80 Instruction *L = CopyDebug(new LoadInst(A, "", III), III);

81 III->replaceAllUsesWith(L);

82 III->eraseFromParent();

83 } else if (ExtractElementInst *EII = dyn_cast<ExtractElementInst>(Inst)) {

84 if (isa<ConstantInt>(EII->getOperand(1)))

85 continue;

86

87 Type *AllocaTy = EII->getOperand(0)->getType();

88 Instruction *A = new AllocaInst(AllocaTy, 0, "", Entry);

89 CopyDebug(new StoreInst(EII->getOperand(0), A, EII), EII);

90

91 Value *Idxs[] = { Zero, EII->getOperand(1) };

92 Instruction *B = CopyDebug(

93 GetElementPtrInst::Create(AllocaTy, A, Idxs, "", EII), EII);

94 Instruction *L = CopyDebug(new LoadInst(B, "", EII), EII);

95 EII->replaceAllUsesWith(L);

96 EII->eraseFromParent();

97 }

98 }

99

100 return Changed;

101 }

102

103 FunctionPass *llvm::createExpandInsertExtractElementPass() {

104 return new ExpandInsertExtractElement();

105 }

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