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Implement comparing a pointer to nil

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This commit is contained in:
Ayke van Laethem
2018-08-22 04:33:09 +02:00
parent c3cb22030f
commit 337e48270b
1 changed files with 16 additions and 4 deletions
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compiler.go
+16 -4
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@@ -1500,11 +1500,11 @@ func (c *Compiler) parseBinOp(frame *Frame, binop *ssa.BinOp) (llvm.Value, error
if err != nil {
return llvm.Value{}, err
}
typ := binop.X.Type()
if typNamed, ok := typ.(*types.Named); ok {
typ = typNamed.Underlying()
typ := binop.X.Type().Underlying()
signed := false
if typ, ok := typ.(*types.Basic); ok {
signed = typ.Info()&types.IsUnsigned == 0
}
signed := typ.(*types.Basic).Info()&types.IsUnsigned == 0
switch binop.Op {
case token.ADD: // +
return c.builder.CreateAdd(x, y, ""), nil
@@ -1560,6 +1560,12 @@ func (c *Compiler) parseBinOp(frame *Frame, binop *ssa.BinOp) (llvm.Value, error
} else {
return llvm.Value{}, errors.New("todo: equality operator on unknown basic type: " + typ.String())
}
case *types.Pointer:
if binop.Op == token.EQL {
return c.builder.CreateICmp(llvm.IntEQ, x, y, ""), nil
} else {
return c.builder.CreateICmp(llvm.IntNE, x, y, ""), nil
}
default:
return llvm.Value{}, errors.New("todo: equality operator on unknown type: " + typ.String())
}
@@ -1635,6 +1641,12 @@ func (c *Compiler) parseConst(expr *ssa.Const) (llvm.Value, error) {
} else {
return llvm.Value{}, errors.New("todo: unknown constant: " + typ.String())
}
case *types.Pointer:
llvmType, err := c.getLLVMType(typ)
if err != nil {
return llvm.Value{}, err
}
return llvm.ConstPointerNull(llvmType), nil
default:
return llvm.Value{}, errors.New("todo: unknown constant: " + typ.String())
}