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Field checks for everybody (#8957)

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* Field checks for JS backend

* Clean nkCall nodes with no arguments

Generating a nkEmpty in place of no arguments makes no sense form the
AST point of view and also trips up the VM codegen.

* Field checks for VM backend

* Test case for #6612

This patchset fixes #6612

* Add test case for LHS double evaluation

* Prevent LHS double-eval for JS backend

* Prevent double evaluation in VM backend
This commit is contained in:
LemonBoy 2018-10-09 19:54:12 +02:00 • committed by Andreas Rumpf
commit ee14ace5d3
10 changed files with 223 additions and 43 deletions
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compiler/destroyer.nim
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@ -289,7 +289,7 @@ proc destructiveMoveSink(n: PNode; c: var Con): PNode =
result = newNodeIT(nkStmtListExpr, n.info, n.typ)
let bit = newSymNode dropBit(c, n.sym)
if optMoveCheck in c.owner.options:
result.add callCodegenProc(c.graph, "chckMove", bit)
result.add callCodegenProc(c.graph, "chckMove", bit.info, bit)
result.add newTree(nkAsgn, bit,
newIntTypeNode(nkIntLit, 0, getSysType(c.graph, n.info, tyBool)))
result.add n