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More undef-propagation related fixes

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This commit is contained in:
Clifford Wolf 2013-11-08 11:40:36 +01:00
parent 9f49d538e1
commit 259cc1391e
2 changed files with 9 additions and 0 deletions
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4
frontends/ast/genrtlil.cc
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@ -1116,6 +1116,7 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
detectSignWidth(width_hint, sign_hint);
RTLIL::SigSpec left = children[0]->genRTLIL(width_hint, sign_hint);
RTLIL::SigSpec right = children[1]->genRTLIL(width_hint, sign_hint);
#if 0
int width = std::max(left.width, right.width);
if (width > width_hint && width_hint > 0)
width = width_hint;
@ -1127,6 +1128,9 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
if (type == AST_MUL)
width = std::min(left.width + right.width, width_hint);
}
#else
int width = std::max(std::max(left.width, right.width), width_hint);
#endif
is_signed = children[0]->is_signed && children[1]->is_signed;
return binop2rtlil(this, type_name, width, left, right);
}