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Iternals: Remove AstAssignPre/AstAssignPost (#6307)

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Replace with AstAlwaysPre/AstAlwaysPost with AstAssign under them.

Step towards #6280
This commit is contained in:
Geza Lore
2025-08-19 09:27:59 +01:00
committed by GitHub
parent c9a6d06544
commit 0bf9fc270f
16 changed files with 80 additions and 95 deletions
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src/V3Delayed.cpp
+16 -11
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@@ -593,11 +593,15 @@ class DelayedVisitor final : public VNVisitor {
activep->senTreeStorep(vscpInfo.senTreep());
scopep->addBlocksp(activep);
// Add 'Pre' scheduled 'shadowVariable = originalVariable' assignment
activep->addStmtsp(new AstAssignPre{flp, new AstVarRef{flp, shadowVscp, VAccess::WRITE},
new AstVarRef{flp, vscp, VAccess::READ}});
AstAlwaysPre* const prep = new AstAlwaysPre{flp};
activep->addStmtsp(prep);
prep->addStmtsp(new AstAssign{flp, new AstVarRef{flp, shadowVscp, VAccess::WRITE},
new AstVarRef{flp, vscp, VAccess::READ}});
// Add 'Post' scheduled 'originalVariable = shadowVariable' assignment
activep->addStmtsp(new AstAssignPost{flp, new AstVarRef{flp, vscp, VAccess::WRITE},
new AstVarRef{flp, shadowVscp, VAccess::READ}});
AstAlwaysPost* const postp = new AstAlwaysPost{flp};
activep->addStmtsp(postp);
postp->addStmtsp(new AstAssign{flp, new AstVarRef{flp, vscp, VAccess::WRITE},
new AstVarRef{flp, shadowVscp, VAccess::READ}});
}
void convertSchemeShadowVar(AstAssignDly* nodep, AstVarScope* vscp, VarScopeInfo& vscpInfo) {
UASSERT_OBJ(vscpInfo.m_scheme == Scheme::ShadowVar, vscp, "Inconsistent NBA scheme");
@@ -735,9 +739,10 @@ class DelayedVisitor final : public VNVisitor {
new AstAssign{flp, new AstVarRef{flp, flagVscp, VAccess::WRITE},
new AstConst{flp, AstConst::BitTrue{}}});
// Add the 'Pre' scheduled reset for the flag
vscpInfo.flagSharedKit().activep->addStmtsp(
new AstAssignPre{flp, new AstVarRef{flp, flagVscp, VAccess::WRITE},
new AstConst{flp, AstConst::BitFalse{}}});
AstAlwaysPre* const prep = new AstAlwaysPre{flp};
vscpInfo.flagSharedKit().activep->addStmtsp(prep);
prep->addStmtsp(new AstAssign{flp, new AstVarRef{flp, flagVscp, VAccess::WRITE},
new AstConst{flp, AstConst::BitFalse{}}});
// Add the 'Post' scheduled commit
AstIf* const ifp = new AstIf{flp, new AstVarRef{flp, flagVscp, VAccess::READ}};
vscpInfo.flagSharedKit().postp->addStmtsp(ifp);
@@ -1164,8 +1169,9 @@ class DelayedVisitor final : public VNVisitor {
return new AstVarRef{flp, dlyvscp, access};
};
AstAssignPre* const prep = new AstAssignPre{flp, dlyRef(VAccess::WRITE),
new AstConst{flp, AstConst::BitFalse{}}};
AstAlwaysPre* const prep = new AstAlwaysPre{flp};
prep->addStmtsp(new AstAssign{flp, dlyRef(VAccess::WRITE),
new AstConst{flp, AstConst::BitFalse{}}});
AstAlwaysPost* const postp = new AstAlwaysPost{flp};
{
AstIf* const ifp = new AstIf{flp, dlyRef(VAccess::READ)};
@@ -1295,8 +1301,7 @@ class DelayedVisitor final : public VNVisitor {
}
// Pre/Post logic are created here and their content need no further changes, so ignore.
void visit(AstAssignPre*) override {}
void visit(AstAssignPost*) override {}
void visit(AstAlwaysPre*) override {}
void visit(AstAlwaysPost*) override {}
//--------------------