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Pointer subtraction using stride instead of size

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This commit is contained in:
Brian Fiete 2023-03-01 05:41:20 -05:00
parent 357f29f94a
commit 200bb6453c
3 changed files with 30 additions and 1 deletions
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2
IDEHelper/Compiler/BfExprEvaluator.cpp
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@ -24256,7 +24256,7 @@ void BfExprEvaluator::PerformBinaryOperation(BfAstNode* leftExpression, BfAstNod
convLeftValue = mModule->CastToValue(leftExpression, leftValue, intPtrType, (BfCastFlags)(BfCastFlags_Explicit | BfCastFlags_FromCompiler));
convRightValue = mModule->CastToValue(rightExpression, rightValue, intPtrType, (BfCastFlags)(BfCastFlags_Explicit | BfCastFlags_FromCompiler));
BfIRValue diffValue = mModule->mBfIRBuilder->CreateSub(convLeftValue, convRightValue);
diffValue = mModule->mBfIRBuilder->CreateDiv(diffValue, mModule->GetConstValue(resultPointerType->mElementType->mSize, intPtrType), true);
diffValue = mModule->mBfIRBuilder->CreateDiv(diffValue, mModule->GetConstValue(resultPointerType->mElementType->GetStride(), intPtrType), true);
mResult = BfTypedValue(diffValue, intPtrType);
}
return;

15
IDEHelper/Tests/src/Loops.bf
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@ -134,9 +134,24 @@ namespace Tests
Test.Assert(!(1..<3).Contains(1..<4));
List<int> iList = scope .() { 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 };
int itrCount = 0;
total = 0;
for (int i in iList[...])
{
itrCount++;
total += i;
}
Test.Assert(itrCount == 10);
Test.Assert(total == 10+20+30+40+50+60+70+80+90+100);
total = 0;
itrCount = 0;
for (int i in iList[...].Reversed)
{
itrCount++;
total += i;
}
Test.Assert(itrCount == 10);
Test.Assert(total == 10+20+30+40+50+60+70+80+90+100);
total = 0;

14
IDEHelper/Tests/src/Structs.bf
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@ -189,6 +189,20 @@ namespace Tests
StructN sn = GetStructN();
Test.Assert(sn.mA == 123);
List<StructD> list = scope .();
for (int i < 10)
list.Add(default);
var ptr0 = &list[0];
var ptr9 = &list[9];
int count = ptr9 - ptr0;
Test.Assert(count == 9);
var ptr9B = ptr0 + 9;
count = ptr9B - ptr0;
Test.Assert(ptr9 == ptr9B);
Test.Assert(count == 9);
}
[Align(16)]