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Opaque pointer GEP fixes for BrainF example

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This commit is contained in:
David Blaikie 2021-07-18 18:24:42 -07:00
parent 5fd061997c
commit cb6ff1d9a4
1 changed files with 15 additions and 20 deletions
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35
examples/BrainF/BrainF.cpp
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@ -114,14 +114,13 @@ void BrainF::header(LLVMContext& C) {
//%arrmax = getelementptr i8 *%arr, i32 %d
if (comflag & flag_arraybounds) {
ptr_arrmax = builder->
CreateGEP(ptr_arr, ConstantInt::get(C, APInt(32, memtotal)), "arrmax");
ptr_arrmax = builder->CreateGEP(
Int8Ty, ptr_arr, ConstantInt::get(C, APInt(32, memtotal)), "arrmax");
}
//%head.%d = getelementptr i8 *%arr, i32 %d
curhead = builder->CreateGEP(ptr_arr,
ConstantInt::get(C, APInt(32, memtotal/2)),
headreg);
curhead = builder->CreateGEP(
Int8Ty, ptr_arr, ConstantInt::get(C, APInt(32, memtotal / 2)), headreg);
//Function footer
@ -195,6 +194,7 @@ void BrainF::readloop(PHINode *phi, BasicBlock *oldbb, BasicBlock *testbb,
char c;
int loop;
int direction;
Type *Int8Ty = IntegerType::getInt8Ty(C);
while(cursym != SYM_EOF && cursym != SYM_ENDLOOP) {
// Write out commands
@ -223,8 +223,7 @@ void BrainF::readloop(PHINode *phi, BasicBlock *oldbb, BasicBlock *testbb,
case SYM_WRITE:
{
//%tape.%d = load i8 *%head.%d
LoadInst *tape_0 =
builder->CreateLoad(IntegerType::getInt8Ty(C), curhead, tapereg);
LoadInst *tape_0 = builder->CreateLoad(Int8Ty, curhead, tapereg);
//%tape.%d = sext i8 %tape.%d to i32
Value *tape_1 = builder->
@ -244,9 +243,9 @@ void BrainF::readloop(PHINode *phi, BasicBlock *oldbb, BasicBlock *testbb,
case SYM_MOVE:
{
//%head.%d = getelementptr i8 *%head.%d, i32 %d
curhead = builder->
CreateGEP(curhead, ConstantInt::get(C, APInt(32, curvalue)),
headreg);
curhead = builder->CreateGEP(Int8Ty, curhead,
ConstantInt::get(C, APInt(32, curvalue)),
headreg);
//Error block for array out of bounds
if (comflag & flag_arraybounds)
@ -276,8 +275,7 @@ void BrainF::readloop(PHINode *phi, BasicBlock *oldbb, BasicBlock *testbb,
case SYM_CHANGE:
{
//%tape.%d = load i8 *%head.%d
LoadInst *tape_0 =
builder->CreateLoad(IntegerType::getInt8Ty(C), curhead, tapereg);
LoadInst *tape_0 = builder->CreateLoad(Int8Ty, curhead, tapereg);
//%tape.%d = add i8 %tape.%d, %d
Value *tape_1 = builder->
@ -300,9 +298,8 @@ void BrainF::readloop(PHINode *phi, BasicBlock *oldbb, BasicBlock *testbb,
builder->SetInsertPoint(bb_1);
// Make part of PHI instruction now, wait until end of loop to finish
PHINode *phi_0 =
PHINode::Create(PointerType::getUnqual(IntegerType::getInt8Ty(C)),
2, headreg, testbb);
PHINode *phi_0 = PHINode::Create(PointerType::getUnqual(Int8Ty), 2,
headreg, testbb);
phi_0->addIncoming(curhead, bb_0);
curhead = phi_0;
@ -441,8 +438,7 @@ void BrainF::readloop(PHINode *phi, BasicBlock *oldbb, BasicBlock *testbb,
Value *head_0 = phi;
//%tape.%d = load i8 *%head.%d
LoadInst *tape_0 = new LoadInst(IntegerType::getInt8Ty(C), head_0,
tapereg, testbb);
LoadInst *tape_0 = new LoadInst(Int8Ty, head_0, tapereg, testbb);
//%test.%d = icmp eq i8 %tape.%d, 0
ICmpInst *test_0 = new ICmpInst(*testbb, ICmpInst::ICMP_EQ, tape_0,
@ -456,9 +452,8 @@ void BrainF::readloop(PHINode *phi, BasicBlock *oldbb, BasicBlock *testbb,
builder->SetInsertPoint(bb_0);
//%head.%d = phi i8 *[%head.%d, %main.%d]
PHINode *phi_1 = builder->
CreatePHI(PointerType::getUnqual(IntegerType::getInt8Ty(C)), 1,
headreg);
PHINode *phi_1 =
builder->CreatePHI(PointerType::getUnqual(Int8Ty), 1, headreg);
phi_1->addIncoming(head_0, testbb);
curhead = phi_1;
}