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Changes EvaluateAsAbsolute() to return the "current value" of the expression

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if we are given a Layout object, even in cases when the value is not fixed.
This will be needed by the final patch for the dwarf .loc support to size a
new MCDwarf fragment needed to build and emit dwarf line number tables.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115155 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kevin Enderby 2010-09-30 16:42:21 +00:00
parent 0bb83a84d4
commit b5a3ec17a4
1 changed files with 16 additions and 1 deletions
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17
lib/MC/MCExpr.cpp
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@ -215,8 +215,23 @@ bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAsmLayout *Layout) const {
return true; return true;
} }
if (!EvaluateAsRelocatable(Value, Layout) || !Value.isAbsolute()) if (!EvaluateAsRelocatable(Value, Layout) || !Value.isAbsolute()) {
// EvaluateAsAbsolute is defined to return the "current value" of
// the expression if we are given a Layout object, even in cases
// when the value is not fixed.
if (Layout) {
Res = Value.getConstant();
if (Value.getSymA()) {
Res += Layout->getSymbolAddress(
&Layout->getAssembler().getSymbolData(Value.getSymA()->getSymbol()));
}
if (Value.getSymB()) {
Res -= Layout->getSymbolAddress(
&Layout->getAssembler().getSymbolData(Value.getSymB()->getSymbol()));
}
}
return false; return false;
}
Res = Value.getConstant(); Res = Value.getConstant();
return true; return true;