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fix alive2 issue 1290 #1291

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Merged
nunoplopes merged 1 commit into from
Feb 27, 2026
Merged

fix alive2 issue 1290 #1291

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4 changes: 2 additions & 2 deletions ir/memory.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1417,7 +1417,7 @@ expr Memory::hasStored(const Pointer &p, const expr &bytes) const {
expr var = expr::mkFreshVar("#off", offset);
state->addQuantVar(var);
expr bytes_div = bytes.zextOrTrunc(offset.bits())
.udiv(expr::mkUInt(bytes_per_byte, bytes));
.udiv(expr::mkUInt(bytes_per_byte, offset));
return (var.uge(offset) && var.ult(offset + bytes_div))
.implies(has_stored_arg.load(bid.concat(var)));
}
Expand Down Expand Up @@ -1448,7 +1448,7 @@ void Memory::record_store(const Pointer &p, const expr &bytes) {
expr var_off = var.trunc(offset.bits());

expr bytes_div = bytes.zextOrTrunc(offset.bits())
.udiv(expr::mkUInt(bytes_per_byte, bytes));
.udiv(expr::mkUInt(bytes_per_byte, offset));
has_stored_arg
= expr::mkIf(is_local,
has_stored_arg,
Expand Down
21 changes: 21 additions & 0 deletions tests/alive-tv/bugs/pr1290.srctgt.ll
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Original file line number Diff line number Diff line change
@@ -0,0 +1,21 @@
define void @f(ptr %out1) {
entry:
store i32 0, ptr %out1, align 4
%arrayidx1 = getelementptr i8, ptr %out1, i64 4
store i32 0, ptr %arrayidx1, align 4
%arrayidx2 = getelementptr i8, ptr %out1, i64 8
store i32 0, ptr %arrayidx2, align 4
%arrayidx3 = getelementptr i8, ptr %out1, i64 12
store i32 0, ptr %arrayidx3, align 4
%arrayidx4 = getelementptr i8, ptr %out1, i64 16
store i32 0, ptr %arrayidx4, align 4
%arrayidx5 = getelementptr i8, ptr %out1, i64 20
store i32 0, ptr %arrayidx5, align 4
%arrayidx6 = getelementptr i8, ptr %out1, i64 24
store i32 0, ptr %arrayidx6, align 4
%arrayidx7 = getelementptr i8, ptr %out1, i64 28
store i32 0, ptr %arrayidx7, align 4
%arrayidx8 = getelementptr i8, ptr %out1, i64 32
store i32 0, ptr %arrayidx8, align 4
ret void
}
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