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Internals: Refactor createForeachAssoc. No functional change intended.

This commit is contained in:
Wilson Snyder 2026-04-11 18:10:05 -04:00
parent 0891d51c75
commit fed8275e42
1 changed files with 35 additions and 33 deletions
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68
src/V3Begin.cpp
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@ -543,6 +543,40 @@ static AstNode* createForeachLoopRanged(AstNodeForeach* nodep, AstNode* bodysp,
return createForeachLoop(nodep, bodysp, varp, leftp, rightp, return createForeachLoop(nodep, bodysp, varp, leftp, rightp,
declRange.left() <= declRange.right() ? VNType::LteS : VNType::GteS); declRange.left() <= declRange.right() ? VNType::LteS : VNType::GteS);
} }
static AstNode* createForeachAssoc(FileLine* fl, AstVar* varp, AstNodeExpr*& subfromp,
AstNodeDType* fromDtp, AstNode* bodyPointp) {
AstVar* const first_varp
= new AstVar{fl, VVarType::BLOCKTEMP, varp->name() + "__Vfirst", VFlagBitPacked{}, 1};
first_varp->usedLoopIdx(true);
first_varp->lifetime(VLifetime::AUTOMATIC_EXPLICIT);
AstNodeExpr* const firstp
= new AstCMethodHard{fl, subfromp->cloneTreePure(false), VCMethod::ASSOC_FIRST,
new AstVarRef{fl, varp, VAccess::READWRITE}};
firstp->dtypeSetSigned32();
AstNodeExpr* const nextp
= new AstCMethodHard{fl, subfromp->cloneTreePure(false), VCMethod::ASSOC_NEXT,
new AstVarRef{fl, varp, VAccess::READWRITE}};
nextp->dtypeSetSigned32();
AstVarRef* varRefp = new AstVarRef{fl, varp, VAccess::READ};
subfromp = new AstCMethodHard{fl, subfromp, VCMethod::ARRAY_AT, varRefp};
subfromp->dtypep(fromDtp);
AstNode* const first_clearp = new AstAssign{fl, new AstVarRef{fl, first_varp, VAccess::WRITE},
new AstConst{fl, AstConst::BitFalse{}}};
AstLogOr* const orp = new AstLogOr{fl, new AstVarRef{fl, first_varp, VAccess::READ},
new AstNeq{fl, new AstConst{fl, 0}, nextp}};
AstLoop* const lp = new AstLoop{fl};
lp->addStmtsp(new AstLoopTest{fl, lp, orp});
lp->addStmtsp(first_clearp);
first_clearp->addNext(bodyPointp);
AstNode* const ifbodyp = new AstAssign{fl, new AstVarRef{fl, first_varp, VAccess::WRITE},
new AstConst{fl, AstConst::BitTrue{}}};
ifbodyp->addNext(lp);
AstNode* loopp = varp;
loopp->addNext(first_varp);
loopp->addNext(new AstIf{fl, new AstNeq{fl, new AstConst{fl, 0}, firstp}, ifbodyp});
return loopp;
}
AstNode* V3Begin::convertToWhile(AstForeach* nodep) { AstNode* V3Begin::convertToWhile(AstForeach* nodep) {
// UINFOTREE(1, nodep, "", "foreach-old"); // UINFOTREE(1, nodep, "", "foreach-old");
const AstForeachHeader* const headerp = nodep->headerp(); const AstForeachHeader* const headerp = nodep->headerp();
@ -605,39 +639,7 @@ AstNode* V3Begin::convertToWhile(AstForeach* nodep) {
// index__Vfirst = 0; // index__Vfirst = 0;
// if (0 != array.first(index)) // if (0 != array.first(index))
// do body while (index__Vfirst || 0 != array.next(index)) // do body while (index__Vfirst || 0 != array.next(index))
AstVar* const first_varp = new AstVar{ loopp = createForeachAssoc(fl, varp, subfromp /*ref*/, fromDtp, bodyPointp);
fl, VVarType::BLOCKTEMP, varp->name() + "__Vfirst", VFlagBitPacked{}, 1};
first_varp->usedLoopIdx(true);
first_varp->lifetime(VLifetime::AUTOMATIC_EXPLICIT);
AstNodeExpr* const firstp
= new AstCMethodHard{fl, subfromp->cloneTreePure(false), VCMethod::ASSOC_FIRST,
new AstVarRef{fl, varp, VAccess::READWRITE}};
firstp->dtypeSetSigned32();
AstNodeExpr* const nextp
= new AstCMethodHard{fl, subfromp->cloneTreePure(false), VCMethod::ASSOC_NEXT,
new AstVarRef{fl, varp, VAccess::READWRITE}};
nextp->dtypeSetSigned32();
AstVarRef* varRefp = new AstVarRef{fl, varp, VAccess::READ};
subfromp = new AstCMethodHard{fl, subfromp, VCMethod::ARRAY_AT, varRefp};
subfromp->dtypep(fromDtp);
AstNode* const first_clearp
= new AstAssign{fl, new AstVarRef{fl, first_varp, VAccess::WRITE},
new AstConst{fl, AstConst::BitFalse{}}};
AstLogOr* const orp
= new AstLogOr{fl, new AstVarRef{fl, first_varp, VAccess::READ},
new AstNeq{fl, new AstConst{fl, 0}, nextp}};
AstLoop* const lp = new AstLoop{fl};
lp->addStmtsp(new AstLoopTest{fl, lp, orp});
lp->addStmtsp(first_clearp);
first_clearp->addNext(bodyPointp);
AstNode* const ifbodyp
= new AstAssign{fl, new AstVarRef{fl, first_varp, VAccess::WRITE},
new AstConst{fl, AstConst::BitTrue{}}};
ifbodyp->addNext(lp);
loopp = varp;
loopp->addNext(first_varp);
loopp->addNext(
new AstIf{fl, new AstNeq{fl, new AstConst{fl, 0}, firstp}, ifbodyp});
} }
UASSERT_OBJ(loopp, argsp, "unable to foreach " << fromDtp); UASSERT_OBJ(loopp, argsp, "unable to foreach " << fromDtp);
// New loop goes UNDER previous loop // New loop goes UNDER previous loop