completed expr/stmt unification
This commit is contained in:
Araq
parent
8e5d6834cc
commit
fa0a327dd6
10 changed files with 642 additions and 673 deletions
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@ -102,6 +102,11 @@ proc genSimpleBlock(p: BProc, stmts: PNode) {.inline.} =
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genStmts(p, stmts)
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endBlock(p)
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proc exprBlock(p: BProc, n: PNode, d: var TLoc) =
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startBlock(p)
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expr(p, n, d)
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endBlock(p)
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template preserveBreakIdx(body: stmt): stmt {.immediate.} =
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var oldBreakIdx = p.breakIdx
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body
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@ -212,7 +217,7 @@ proc genConstStmt(p: BProc, t: PNode) =
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appf(p.module.s[cfsData], "NIM_CONST $1 $2 = $3;$n",
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[getTypeDesc(p.module, c.typ), c.loc.r, genConstExpr(p, c.ast)])
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proc genIfStmt(p: BProc, n: PNode) =
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proc genIf(p: BProc, n: PNode, d: var TLoc) =
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#
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# { if (!expr1) goto L1;
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# thenPart }
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@ -224,32 +229,36 @@ proc genIfStmt(p: BProc, n: PNode) =
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# L2:
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# { elsePart }
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# Lend:
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var
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var
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a: TLoc
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Lelse: TLabel
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if not isEmptyType(n.typ) and d.k == locNone:
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getTemp(p, n.typ, d)
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genLineDir(p, n)
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var Lend = getLabel(p)
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let Lend = getLabel(p)
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for i in countup(0, sonsLen(n) - 1):
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var it = n.sons[i]
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let it = n.sons[i]
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if it.len == 2:
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when newScopeForIf: startBlock(p)
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initLocExpr(p, it.sons[0], a)
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Lelse = getLabel(p)
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inc(p.labels)
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lineFF(p, cpsStmts, "if (!$1) goto $2;$n",
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"br i1 $1, label %LOC$3, label %$2$n" & "LOC$3: $n",
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"br i1 $1, label %LOC$3, label %$2$nLOC$3: $n",
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[rdLoc(a), Lelse, toRope(p.labels)])
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when not newScopeForIf: startBlock(p)
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genStmts(p, it.sons[1])
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expr(p, it.sons[1], d)
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endBlock(p)
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if sonsLen(n) > 1:
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if sonsLen(n) > 1:
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lineFF(p, cpsStmts, "goto $1;$n", "br label %$1$n", [Lend])
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fixLabel(p, Lelse)
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elif it.len == 1:
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genSimpleBlock(p, it.sons[0])
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else: internalError(n.info, "genIfStmt()")
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startBlock(p)
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expr(p, it.sons[0], d)
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endBlock(p)
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else: internalError(n.info, "genIf()")
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if sonsLen(n) > 1: fixLabel(p, Lend)
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proc blockLeaveActions(p: BProc, howMany: int) =
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var L = p.nestedTryStmts.len
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# danger of endless recursion! we workaround this here by a temp stack
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@ -312,16 +321,15 @@ proc genWhileStmt(p: BProc, t: PNode) =
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proc genBlock(p: BProc, t: PNode, d: var TLoc) =
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preserveBreakIdx:
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p.breakIdx = startBlock(p)
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if t.sons[0].kind != nkEmpty:
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if t.sons[0].kind != nkEmpty:
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# named block?
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assert(t.sons[0].kind == nkSym)
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var sym = t.sons[0].sym
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sym.loc.k = locOther
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sym.loc.a = p.breakIdx
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if t.kind == nkBlockExpr: genStmtListExpr(p, t.sons[1], d)
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else: genStmts(p, t.sons[1])
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expr(p, t.sons[1], d)
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endBlock(p)
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proc genParForStmt(p: BProc, t: PNode) =
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assert(sonsLen(t) == 3)
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inc(p.withinLoop)
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@ -411,42 +419,45 @@ proc genCaseGenericBranch(p: BProc, b: PNode, e: TLoc,
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initLocExpr(p, b.sons[i], x)
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lineCg(p, cpsStmts, eqFormat, [rdCharLoc(e), rdCharLoc(x), labl])
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proc genCaseSecondPass(p: BProc, t: PNode, labId, until: int): TLabel =
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proc genCaseSecondPass(p: BProc, t: PNode, d: var TLoc,
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labId, until: int): TLabel =
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var Lend = getLabel(p)
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for i in 1..until:
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for i in 1..until:
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lineF(p, cpsStmts, "LA$1: ;$n", [toRope(labId + i)])
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if t.sons[i].kind == nkOfBranch:
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var length = sonsLen(t.sons[i])
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genSimpleBlock(p, t.sons[i].sons[length - 1])
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exprBlock(p, t.sons[i].sons[length - 1], d)
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lineF(p, cpsStmts, "goto $1;$n", [Lend])
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else:
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genSimpleBlock(p, t.sons[i].sons[0])
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else:
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exprBlock(p, t.sons[i].sons[0], d)
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result = Lend
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proc genIfForCaseUntil(p: BProc, t: PNode, rangeFormat, eqFormat: TFormatStr,
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until: int, a: TLoc): TLabel =
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proc genIfForCaseUntil(p: BProc, t: PNode, d: var TLoc,
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rangeFormat, eqFormat: TFormatStr,
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until: int, a: TLoc): TLabel =
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# generate a C-if statement for a Nimrod case statement
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var labId = p.labels
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for i in 1..until:
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for i in 1..until:
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inc(p.labels)
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if t.sons[i].kind == nkOfBranch: # else statement
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genCaseGenericBranch(p, t.sons[i], a, rangeFormat, eqFormat,
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genCaseGenericBranch(p, t.sons[i], a, rangeFormat, eqFormat,
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con("LA", toRope(p.labels)))
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else:
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else:
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lineF(p, cpsStmts, "goto LA$1;$n", [toRope(p.labels)])
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if until < t.len-1:
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if until < t.len-1:
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inc(p.labels)
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var gotoTarget = p.labels
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lineF(p, cpsStmts, "goto LA$1;$n", [toRope(gotoTarget)])
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result = genCaseSecondPass(p, t, labId, until)
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result = genCaseSecondPass(p, t, d, labId, until)
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lineF(p, cpsStmts, "LA$1: ;$n", [toRope(gotoTarget)])
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else:
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result = genCaseSecondPass(p, t, labId, until)
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result = genCaseSecondPass(p, t, d, labId, until)
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proc genCaseGeneric(p: BProc, t: PNode, rangeFormat, eqFormat: TFormatStr) =
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proc genCaseGeneric(p: BProc, t: PNode, d: var TLoc,
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rangeFormat, eqFormat: TFormatStr) =
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var a: TLoc
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initLocExpr(p, t.sons[0], a)
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var Lend = genIfForCaseUntil(p, t, rangeFormat, eqFormat, sonsLen(t)-1, a)
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var Lend = genIfForCaseUntil(p, t, d, rangeFormat, eqFormat, sonsLen(t)-1, a)
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fixLabel(p, Lend)
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proc genCaseStringBranch(p: BProc, b: PNode, e: TLoc, labl: TLabel,
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@ -461,12 +472,12 @@ proc genCaseStringBranch(p: BProc, b: PNode, e: TLoc, labl: TLabel,
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appcg(p.module, branches[j], "if (#eqStrings($1, $2)) goto $3;$n",
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[rdLoc(e), rdLoc(x), labl])
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proc genStringCase(p: BProc, t: PNode) =
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proc genStringCase(p: BProc, t: PNode, d: var TLoc) =
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# count how many constant strings there are in the case:
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var strings = 0
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for i in countup(1, sonsLen(t) - 1):
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for i in countup(1, sonsLen(t) - 1):
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if t.sons[i].kind == nkOfBranch: inc(strings, sonsLen(t.sons[i]) - 1)
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if strings > stringCaseThreshold:
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if strings > stringCaseThreshold:
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var bitMask = math.nextPowerOfTwo(strings) - 1
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var branches: seq[PRope]
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newSeq(branches, bitMask + 1)
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@ -484,23 +495,17 @@ proc genStringCase(p: BProc, t: PNode) =
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linefmt(p, cpsStmts, "switch (#hashString($1) & $2) {$n",
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rdLoc(a), toRope(bitMask))
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for j in countup(0, high(branches)):
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when false:
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let interior = cast[int](interiorAllocatedPtr(addr(branches[0])))+
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2*sizeof(pointer)
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let brn = cast[int](cast[pointer](branches))
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if interior != brn:
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echo "BUG! ", interior, "-", brn
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if branches[j] != nil:
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lineF(p, cpsStmts, "case $1: $n$2break;$n",
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[intLiteral(j), branches[j]])
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lineF(p, cpsStmts, "}$n") # else statement:
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if t.sons[sonsLen(t) - 1].kind != nkOfBranch:
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if t.sons[sonsLen(t)-1].kind != nkOfBranch:
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lineF(p, cpsStmts, "goto LA$1;$n", [toRope(p.labels)])
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# third pass: generate statements
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var Lend = genCaseSecondPass(p, t, labId, sonsLen(t)-1)
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var Lend = genCaseSecondPass(p, t, d, labId, sonsLen(t)-1)
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fixLabel(p, Lend)
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else:
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genCaseGeneric(p, t, "", "if (#eqStrings($1, $2)) goto $3;$n")
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else:
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genCaseGeneric(p, t, d, "", "if (#eqStrings($1, $2)) goto $3;$n")
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proc branchHasTooBigRange(b: PNode): bool =
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for i in countup(0, sonsLen(b)-2):
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@ -535,14 +540,14 @@ proc genCaseRange(p: BProc, branch: PNode) =
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else:
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lineF(p, cpsStmts, "case $1:$n", [genLiteral(p, branch[j])])
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proc genOrdinalCase(p: BProc, n: PNode) =
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proc genOrdinalCase(p: BProc, n: PNode, d: var TLoc) =
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# analyse 'case' statement:
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var splitPoint = IfSwitchSplitPoint(p, n)
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# generate if part (might be empty):
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var a: TLoc
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initLocExpr(p, n.sons[0], a)
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var Lend = if splitPoint > 0: genIfForCaseUntil(p, n,
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var Lend = if splitPoint > 0: genIfForCaseUntil(p, n, d,
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rangeFormat = "if ($1 >= $2 && $1 <= $3) goto $4;$n",
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eqFormat = "if ($1 == $2) goto $3;$n",
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splitPoint, a) else: nil
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@ -555,28 +560,29 @@ proc genOrdinalCase(p: BProc, n: PNode) =
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var branch = n[i]
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if branch.kind == nkOfBranch:
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genCaseRange(p, branch)
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genSimpleBlock(p, branch.lastSon)
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else:
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# else part of case statement:
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lineF(p, cpsStmts, "default:$n")
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genSimpleBlock(p, branch[0])
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hasDefault = true
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exprBlock(p, branch.lastSon, d)
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lineF(p, cpsStmts, "break;$n")
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if (hasAssume in CC[ccompiler].props) and not hasDefault:
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lineF(p, cpsStmts, "default: __assume(0);$n")
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lineF(p, cpsStmts, "}$n")
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if Lend != nil: fixLabel(p, Lend)
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proc genCaseStmt(p: BProc, t: PNode) =
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proc genCase(p: BProc, t: PNode, d: var TLoc) =
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genLineDir(p, t)
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if not isEmptyType(t.typ) and d.k == locNone:
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getTemp(p, t.typ, d)
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case skipTypes(t.sons[0].typ, abstractVarRange).kind
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of tyString:
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genStringCase(p, t)
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of tyString:
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genStringCase(p, t, d)
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of tyFloat..tyFloat128:
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genCaseGeneric(p, t, "if ($1 >= $2 && $1 <= $3) goto $4;$n",
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"if ($1 == $2) goto $3;$n")
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else:
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genOrdinalCase(p, t)
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genCaseGeneric(p, t, d, "if ($1 >= $2 && $1 <= $3) goto $4;$n",
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"if ($1 == $2) goto $3;$n")
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else:
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genOrdinalCase(p, t, d)
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proc hasGeneralExceptSection(t: PNode): bool =
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var length = sonsLen(t)
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@ -588,7 +594,7 @@ proc hasGeneralExceptSection(t: PNode): bool =
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inc(i)
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result = false
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proc genTryStmtCpp(p: BProc, t: PNode) =
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proc genTryCpp(p: BProc, t: PNode, d: var TLoc) =
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# code to generate:
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#
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# XXX: There should be a standard dispatch algorithm
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@ -609,6 +615,8 @@ proc genTryStmtCpp(p: BProc, t: PNode) =
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# }
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# }
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# finallyPart();
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if not isEmptyType(t.typ) and d.k == locNone:
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getTemp(p, t.typ, d)
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var
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exc: PRope
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i, length, blen: int
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@ -617,7 +625,7 @@ proc genTryStmtCpp(p: BProc, t: PNode) =
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discard cgsym(p.module, "E_Base")
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add(p.nestedTryStmts, t)
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startBlock(p, "try {$n")
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genStmts(p, t.sons[0])
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expr(p, t.sons[0], d)
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length = sonsLen(t)
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endBlock(p, ropecg(p.module, "} catch (NimException& $1) {$n", [exc]))
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if optStackTrace in p.Options:
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@ -631,7 +639,7 @@ proc genTryStmtCpp(p: BProc, t: PNode) =
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if blen == 1:
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# general except section:
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catchAllPresent = true
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genSimpleBlock(p, t.sons[i].sons[0])
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exprBlock(p, t.sons[i].sons[0], d)
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else:
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var orExpr: PRope = nil
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for j in countup(0, blen - 2):
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@ -641,7 +649,7 @@ proc genTryStmtCpp(p: BProc, t: PNode) =
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"#isObj($1.exp->m_type, $2)",
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[exc, genTypeInfo(p.module, t.sons[i].sons[j].typ)])
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lineF(p, cpsStmts, "if ($1) ", [orExpr])
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genSimpleBlock(p, t.sons[i].sons[blen-1])
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exprBlock(p, t.sons[i].sons[blen-1], d)
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inc(i)
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# reraise the exception if there was no catch all
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@ -651,7 +659,7 @@ proc genTryStmtCpp(p: BProc, t: PNode) =
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startBlock(p)
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var finallyBlock = t.lastSon
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if finallyBlock.kind == nkFinally:
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genStmts(p, finallyBlock.sons[0])
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expr(p, finallyBlock.sons[0], d)
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line(p, cpsStmts, ~"throw;$n")
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endBlock(p)
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@ -660,9 +668,9 @@ proc genTryStmtCpp(p: BProc, t: PNode) =
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discard pop(p.nestedTryStmts)
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if (i < length) and (t.sons[i].kind == nkFinally):
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genSimpleBlock(p, t.sons[i].sons[0])
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exprBlock(p, t.sons[i].sons[0], d)
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proc genTryStmt(p: BProc, t: PNode) =
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proc genTry(p: BProc, t: PNode, d: var TLoc) =
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# code to generate:
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#
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# XXX: There should be a standard dispatch algorithm
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@ -691,6 +699,8 @@ proc genTryStmt(p: BProc, t: PNode) =
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# if (exception not cleared)
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# propagateCurrentException();
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#
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if not isEmptyType(t.typ) and d.k == locNone:
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getTemp(p, t.typ, d)
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genLineDir(p, t)
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var safePoint = getTempName()
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discard cgsym(p.module, "E_Base")
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@ -700,7 +710,7 @@ proc genTryStmt(p: BProc, t: PNode) =
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startBlock(p, "if ($1.status == 0) {$n", [safePoint])
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var length = sonsLen(t)
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add(p.nestedTryStmts, t)
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genStmts(p, t.sons[0])
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expr(p, t.sons[0], d)
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linefmt(p, cpsStmts, "#popSafePoint();$n")
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endBlock(p)
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startBlock(p, "else {$n")
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@ -716,7 +726,7 @@ proc genTryStmt(p: BProc, t: PNode) =
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if i > 1: lineF(p, cpsStmts, "else")
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startBlock(p)
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linefmt(p, cpsStmts, "$1.status = 0;$n", safePoint)
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genStmts(p, t.sons[i].sons[0])
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expr(p, t.sons[i].sons[0], d)
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linefmt(p, cpsStmts, "#popCurrentException();$n")
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endBlock(p)
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else:
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@ -730,7 +740,7 @@ proc genTryStmt(p: BProc, t: PNode) =
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if i > 1: line(p, cpsStmts, "else ")
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startBlock(p, "if ($1) {$n", [orExpr])
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linefmt(p, cpsStmts, "$1.status = 0;$n", safePoint)
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genStmts(p, t.sons[i].sons[blen-1])
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expr(p, t.sons[i].sons[blen-1], d)
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linefmt(p, cpsStmts, "#popCurrentException();$n")
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endBlock(p)
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inc(i)
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@ -738,7 +748,7 @@ proc genTryStmt(p: BProc, t: PNode) =
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discard pop(p.nestedTryStmts)
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endBlock(p) # end of else block
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if i < length and t.sons[i].kind == nkFinally:
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genSimpleBlock(p, t.sons[i].sons[0])
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exprBlock(p, t.sons[i].sons[0], d)
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linefmt(p, cpsStmts, "if ($1.status != 0) #reraiseException();$n", safePoint)
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proc genAsmOrEmitStmt(p: BProc, t: PNode): PRope =
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@ -862,61 +872,5 @@ proc genAsgn(p: BProc, e: PNode, fastAsgn: bool) =
|
|||
|
||||
proc genStmts(p: BProc, t: PNode) =
|
||||
var a: TLoc
|
||||
case t.kind
|
||||
of nkEmpty:
|
||||
nil
|
||||
of nkStmtList:
|
||||
for i in countup(0, sonsLen(t) - 1): genStmts(p, t.sons[i])
|
||||
of nkBlockStmt: genBlock(p, t, a)
|
||||
of nkIfStmt: genIfStmt(p, t)
|
||||
of nkWhileStmt: genWhileStmt(p, t)
|
||||
of nkVarSection, nkLetSection: genVarStmt(p, t)
|
||||
of nkConstSection: genConstStmt(p, t)
|
||||
of nkForStmt: internalError(t.info, "for statement not eliminated")
|
||||
of nkCaseStmt: genCaseStmt(p, t)
|
||||
of nkReturnStmt: genReturnStmt(p, t)
|
||||
of nkBreakStmt: genBreakStmt(p, t)
|
||||
of nkCall, nkHiddenCallConv, nkInfix, nkPrefix, nkPostfix, nkCommand,
|
||||
nkCallStrLit, nkClosure:
|
||||
genLineDir(p, t)
|
||||
initLocExpr(p, t, a)
|
||||
of nkAsgn: genAsgn(p, t, fastAsgn=false)
|
||||
of nkFastAsgn:
|
||||
# transf is overly aggressive with 'nkFastAsgn', so we work around here.
|
||||
# See tests/run/tcnstseq3 for an example that would fail otherwise.
|
||||
genAsgn(p, t, fastAsgn=p.prc != nil)
|
||||
of nkDiscardStmt:
|
||||
if t.sons[0].kind != nkEmpty:
|
||||
genLineDir(p, t)
|
||||
initLocExpr(p, t.sons[0], a)
|
||||
of nkAsmStmt: genAsmStmt(p, t)
|
||||
of nkTryStmt:
|
||||
if gCmd == cmdCompileToCpp: genTryStmtCpp(p, t)
|
||||
else: genTryStmt(p, t)
|
||||
of nkRaiseStmt: genRaiseStmt(p, t)
|
||||
of nkTypeSection:
|
||||
# we have to emit the type information for object types here to support
|
||||
# separate compilation:
|
||||
genTypeSection(p.module, t)
|
||||
of nkCommentStmt, nkNilLit, nkIteratorDef, nkIncludeStmt,
|
||||
nkImportStmt, nkImportExceptStmt, nkExportStmt, nkExportExceptStmt,
|
||||
nkFromStmt, nkTemplateDef, nkMacroDef:
|
||||
nil
|
||||
of nkPragma: genPragma(p, t)
|
||||
of nkProcDef, nkMethodDef, nkConverterDef:
|
||||
if (t.sons[genericParamsPos].kind == nkEmpty):
|
||||
var prc = t.sons[namePos].sym
|
||||
if (optDeadCodeElim notin gGlobalOptions and
|
||||
sfDeadCodeElim notin getModule(prc).flags) or
|
||||
({sfExportc, sfCompilerProc} * prc.flags == {sfExportc}) or
|
||||
(sfExportc in prc.flags and lfExportLib in prc.loc.flags) or
|
||||
(prc.kind == skMethod):
|
||||
# we have not only the header:
|
||||
if prc.getBody.kind != nkEmpty or lfDynamicLib in prc.loc.flags:
|
||||
genProc(p.module, prc)
|
||||
of nkParForStmt: genParForStmt(p, t)
|
||||
of nkState: genState(p, t)
|
||||
of nkGotoState: genGotoState(p, t)
|
||||
of nkBreakState: genBreakState(p, t)
|
||||
else: internalError(t.info, "genStmts(" & $t.kind & ')')
|
||||
|
||||
expr(p, t, a)
|
||||
InternalAssert a.k notin {locNone, locTemp}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue