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Use LLVM API for type size calculations

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This commit is contained in:
Ayke van Laethem
2018-04-20 23:55:30 +02:00
parent 217c48f933
commit 02332080e6
1 changed files with 3 additions and 25 deletions
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tgo.go
+3 -25
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@@ -286,26 +286,6 @@ func (c *Compiler) getLLVMType(goType types.Type) (llvm.Type, error) {
}
}
func (c *Compiler) getTypeWidth(typ types.Type) (int, error) {
switch typ := typ.(type) {
case *types.Basic:
if typ.Kind() == types.UnsafePointer {
return c.targetData.PointerSize(), nil
}
llvmType, err := c.getLLVMType(typ)
if err != nil {
return 0, err
}
return llvmType.IntTypeWidth(), nil
case *types.Named:
return c.getTypeWidth(typ.Underlying())
case *types.Pointer:
return c.targetData.PointerSize(), nil
default:
return 0, errors.New("todo: type width")
}
}
func (c *Compiler) getInterfaceType(typ types.Type) llvm.Value {
if _, ok := c.itfTypeNumbers[typ]; !ok {
num := uint64(len(c.itfTypes))
@@ -831,18 +811,16 @@ func (c *Compiler) parseConvert(frame *Frame, expr *ssa.Convert) (llvm.Value, er
return value, nil
}
sizeFrom, err := c.getTypeWidth(expr.X.Type())
typeFrom, err := c.getLLVMType(expr.X.Type())
if err != nil {
return llvm.Value{}, err
}
sizeFrom := c.targetData.TypeAllocSize(typeFrom)
typeTo, err := c.getLLVMType(expr.Type())
if err != nil {
return llvm.Value{}, err
}
sizeTo, err := c.getTypeWidth(expr.Type())
if err != nil {
return llvm.Value{}, err
}
sizeTo := c.targetData.TypeAllocSize(typeTo)
if sizeFrom > sizeTo {
return c.builder.CreateTrunc(value, typeTo, ""), nil