func (d *debugInfo) setLocation(b llvm.Builder, pos token.Pos) {
position := d.Fset.Position(pos)
b.SetCurrentDebugLocation(llvm.MDNode([]llvm.Value{
llvm.ConstInt(llvm.Int32Type(), uint64(position.Line), true),
llvm.ConstInt(llvm.Int32Type(), uint64(position.Column), true),
d.MDNode(d.context()),
llvm.Value{},
}))
}
// declare creates an llvm.dbg.declare call for the specified function
// parameter or local variable.
func (d *debugInfo) declare(b llvm.Builder, v ssa.Value, llv llvm.Value, paramIndex int) {
tag := tagAutoVariable
if paramIndex >= 0 {
tag = tagArgVariable
}
ld := debug.NewLocalVariableDescriptor(tag)
ld.Argument = uint32(paramIndex + 1)
ld.Name = llv.Name()
if file := d.Fset.File(v.Pos()); file != nil {
ld.Line = uint32(file.Position(v.Pos()).Line)
ld.File = &d.getCompileUnit(file).Path
}
ld.Type = d.TypeDebugDescriptor(deref(v.Type()))
ld.Context = d.context()
b.InsertDeclare(d.module, llvm.MDNode([]llvm.Value{llv}), d.MDNode(ld))
}
// coerce yields a value of the the type specified, initialised
// to the exact bit pattern as in the specified value.
//
// Note: the value's type and the specified target type must have
// the same size. If the source is an aggregate, then the target
// must also be an aggregate with the same number of fields, each
// of which must have the same size.
func coerce(b llvm.Builder, v llvm.Value, t llvm.Type) llvm.Value {
// FIXME don't do this with alloca
switch t.TypeKind() {
case llvm.ArrayTypeKind, llvm.StructTypeKind:
ptr := b.CreateAlloca(t, "")
ptrv := b.CreateBitCast(ptr, llvm.PointerType(v.Type(), 0), "")
b.CreateStore(v, ptrv)
return b.CreateLoad(ptr, "")
}
vt := v.Type()
switch vt.TypeKind() {
case llvm.ArrayTypeKind, llvm.StructTypeKind:
ptr := b.CreateAlloca(vt, "")
b.CreateStore(v, ptr)
ptrt := b.CreateBitCast(ptr, llvm.PointerType(t, 0), "")
return b.CreateLoad(ptrt, "")
}
return b.CreateBitCast(v, t, "")
}