Merge branch 'devel' of github.com:nim-lang/Nim into devel

compiler/cgen.nim

@@ -1258,7 +1258,7 @@ proc resetModule*(m: BModule) =
 
   # indicate that this is now cached module
   # the cache will be invalidated by nullifying gModules
-  m.fromCache = true
+  #m.fromCache = true
   m.g = nil
 
   # we keep only the "merge info" information for the module
@@ -1390,7 +1390,7 @@ proc writeModule(m: BModule, pending: bool) =
   # generate code for the init statements of the module:
   let cfile = getCFile(m)
 
-  if not m.fromCache or optForceFullMake in gGlobalOptions:
+  if m.rd == nil or optForceFullMake in gGlobalOptions:
     genInitCode(m)
     finishTypeDescriptions(m)
     if sfMainModule in m.module.flags:
@@ -1465,10 +1465,10 @@ proc cgenWriteModules*(backend: RootRef, config: ConfigRef) =
   if g.generatedHeader != nil: finishModule(g.generatedHeader)
   while g.forwardedProcsCounter > 0:
     for m in cgenModules(g):
-      if not m.fromCache:
+      if m.rd == nil:
         finishModule(m)
   for m in cgenModules(g):
-    if m.fromCache:
+    if m.rd != nil:
       m.updateCachedModule
     else:
       m.writeModule(pending=true)

compiler/extccomp.nim

@@ -253,7 +253,7 @@ compiler tcc:
     compilerExe: "tcc",
     cppCompiler: "",
     compileTmpl: "-c $options $include -o $objfile $file",
-    buildGui: "UNAVAILABLE!",
+    buildGui: "-Wl,-subsystem=gui",
     buildDll: " -shared",
     buildLib: "", # XXX: not supported yet
     linkerExe: "tcc",

compiler/jsgen.nim

@@ -2051,10 +2051,10 @@ proc genConv(p: PProc, n: PNode, r: var TCompRes) =
     return
   case dest.kind:
   of tyBool:
-    r.res = "(($1)? 1:0)" % [r.res]
+    r.res = "(!!($1))" % [r.res]
     r.kind = resExpr
   of tyInt:
-    r.res = "($1|0)" % [r.res]
+    r.res = "(($1)|0)" % [r.res]
   else:
     # TODO: What types must we handle here?
     discard

compiler/passes.nim

@@ -18,7 +18,7 @@ import
 
 type
   TPassContext* = object of RootObj # the pass's context
-    fromCache*: bool  # true if created by "openCached"
+    rd*: PRodReader  # != nil if created by "openCached"
 
   PPassContext* = ref TPassContext
 
@@ -118,7 +118,7 @@ proc openPassesCached(g: ModuleGraph; a: var TPassContextArray, module: PSym,
     if not isNil(gPasses[i].openCached):
       a[i] = gPasses[i].openCached(g, module, rd)
       if a[i] != nil:
-        a[i].fromCache = true
+        a[i].rd = rd
     else:
       a[i] = nil
 

compiler/renderer.nim

@@ -719,6 +719,7 @@ proc gcase(g: var TSrcGen, n: PNode) =
   var c: TContext
   initContext(c)
   var length = sonsLen(n)
+  if length == 0: return
   var last = if n.sons[length-1].kind == nkElse: -2 else: -1
   if longMode(g, n, 0, last): incl(c.flags, rfLongMode)
   putWithSpace(g, tkCase, "case")

compiler/sem.nim

@@ -74,7 +74,7 @@ proc fitNode(c: PContext, formal: PType, arg: PNode; info: TLineInfo): PNode =
     localError(arg.info, errExprXHasNoType,
                renderTree(arg, {renderNoComments}))
     # error correction:
-    result = copyNode(arg)
+    result = copyTree(arg)
     result.typ = formal
   else:
     result = indexTypesMatch(c, formal, arg.typ, arg)
@@ -168,9 +168,9 @@ proc commonType*(x, y: PType): PType =
 proc endsInNoReturn(n: PNode): bool =
   # check if expr ends in raise exception or call of noreturn proc
   var it = n
-  while it.kind in {nkStmtList, nkStmtListExpr} and it.len > 0: 
+  while it.kind in {nkStmtList, nkStmtListExpr} and it.len > 0:
     it = it.lastSon
-  result = it.kind == nkRaiseStmt or 
+  result = it.kind == nkRaiseStmt or
     it.kind in nkCallKinds and it[0].kind == nkSym and sfNoReturn in it[0].sym.flags
 
 proc commonType*(x: PType, y: PNode): PType =
@@ -501,6 +501,8 @@ proc myOpen(graph: ModuleGraph; module: PSym; cache: IdentCache): PPassContext =
 
 proc myOpenCached(graph: ModuleGraph; module: PSym; rd: PRodReader): PPassContext =
   result = myOpen(graph, module, rd.cache)
+
+proc replayMethodDefs(graph: ModuleGraph; rd: PRodReader) =
   for m in items(rd.methods): methodDef(graph, m, true)
 
 proc isImportSystemStmt(n: PNode): bool =
@@ -607,6 +609,8 @@ proc myClose(graph: ModuleGraph; context: PPassContext, n: PNode): PNode =
   addCodeForGenerics(c, result)
   if c.module.ast != nil:
     result.add(c.module.ast)
+  if c.rd != nil:
+    replayMethodDefs(graph, c.rd)
   popOwner(c)
   popProcCon(c)
   if c.runnableExamples != nil: testExamples(c)

compiler/semexprs.nim

@@ -1425,11 +1425,7 @@ proc semProcBody(c: PContext, n: PNode): PNode =
   openScope(c)
   result = semExpr(c, n)
   if c.p.resultSym != nil and not isEmptyType(result.typ):
-    # transform ``expr`` to ``result = expr``, but not if the expr is already
-    # ``result``:
-    if result.kind == nkSym and result.sym == c.p.resultSym:
-      discard
-    elif result.kind == nkNilLit:
+    if result.kind == nkNilLit:
       # or ImplicitlyDiscardable(result):
       # new semantic: 'result = x' triggers the void context
       result.typ = nil

compiler/transf.nim

@@ -914,7 +914,7 @@ proc processTransf(c: PTransf, n: PNode, owner: PSym): PNode =
   # Note: For interactive mode we cannot call 'passes.skipCodegen' and skip
   # this step! We have to rely that the semantic pass transforms too errornous
   # nodes into an empty node.
-  if c.fromCache or nfTransf in n.flags: return n
+  if c.rd != nil or nfTransf in n.flags: return n
   pushTransCon(c, newTransCon(owner))
   result = PNode(transform(c, n))
   popTransCon(c)

compiler/vmgen.nim

@@ -30,7 +30,7 @@
 import
   strutils, ast, astalgo, types, msgs, renderer, vmdef,
   trees, intsets, rodread, magicsys, options, lowerings
-
+import platform
 from os import splitFile
 
 when hasFFI:
@@ -761,6 +761,49 @@ proc genCard(c: PCtx; n: PNode; dest: var TDest) =
   c.gABC(n, opcCard, dest, tmp)
   c.freeTemp(tmp)
 
+proc genIntCast(c: PCtx; n: PNode; dest: var TDest) =
+  const allowedIntegers = {tyInt..tyInt64, tyUInt..tyUInt64, tyChar}
+  var signedIntegers = {tyInt8..tyInt32}
+  var unsignedIntegers = {tyUInt8..tyUInt32, tyChar}
+  let src = n.sons[1].typ.skipTypes(abstractRange)#.kind
+  let dst = n.sons[0].typ.skipTypes(abstractRange)#.kind
+  let src_size = src.getSize
+
+  if platform.intSize < 8:
+    signedIntegers.incl(tyInt)
+    unsignedIntegers.incl(tyUInt)
+  if src_size == dst.getSize and src.kind in allowedIntegers and
+                                 dst.kind in allowedIntegers:
+    let tmp = c.genx(n.sons[1])
+    var tmp2 = c.getTemp(n.sons[1].typ)
+    let tmp3 = c.getTemp(n.sons[1].typ)
+    if dest < 0: dest = c.getTemp(n[0].typ)
+    proc mkIntLit(ival: int): int =
+      result = genLiteral(c, newIntTypeNode(nkIntLit, ival, getSysType(tyInt)))
+    if src.kind in unsignedIntegers and dst.kind in signedIntegers:
+      # cast unsigned to signed integer of same size
+      # signedVal = (unsignedVal xor offset) -% offset
+      let offset = 1 shl (src_size * 8 - 1)
+      c.gABx(n, opcLdConst, tmp2, mkIntLit(offset))
+      c.gABC(n, opcBitxorInt, tmp3, tmp, tmp2)
+      c.gABC(n, opcSubInt, dest, tmp3, tmp2)
+    elif src.kind in signedIntegers and dst.kind in unsignedIntegers:
+      # cast signed to unsigned integer of same size
+      # unsignedVal = (offset +% signedVal +% 1) and offset
+      let offset = (1 shl (src_size * 8))  - 1
+      c.gABx(n, opcLdConst, tmp2, mkIntLit(offset))
+      c.gABx(n, opcLdConst, dest, mkIntLit(offset+1))
+      c.gABC(n, opcAddu, tmp3, tmp, dest)
+      c.gABC(n, opcNarrowU, tmp3, TRegister(src_size*8))
+      c.gABC(n, opcBitandInt, dest, tmp3, tmp2)
+    else:
+      c.gABC(n, opcAsgnInt, dest, tmp)
+    c.freeTemp(tmp)
+    c.freeTemp(tmp2)
+    c.freeTemp(tmp3)
+  else:
+    globalError(n.info, errGenerated, "VM is only allowed to 'cast' between integers of same size")
+
 proc genMagic(c: PCtx; n: PNode; dest: var TDest; m: TMagic) =
   case m
   of mAnd: c.genAndOr(n, opcFJmp, dest)
@@ -1844,7 +1887,7 @@ proc gen(c: PCtx; n: PNode; dest: var TDest; flags: TGenFlags = {}) =
     if allowCast in c.features:
       genConv(c, n, n.sons[1], dest, opcCast)
     else:
-      globalError(n.info, errGenerated, "VM is not allowed to 'cast'")
+      genIntCast(c, n, dest)
   of nkTypeOfExpr:
     genTypeLit(c, n.typ, dest)
   of nkComesFrom: