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ConstantFoldConstantExpression can theoretically return the original

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expression; don't go into an infinite loop if it does.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95591 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-02-08 22:19:11 +00:00
parent 25ceb5f317
commit 54e72eca0c
1 changed files with 4 additions and 2 deletions
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6
lib/CodeGen/AsmPrinter/AsmPrinter.cpp
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@ -892,8 +892,10 @@ static const MCExpr *LowerConstant(const Constant *CV, AsmPrinter &AP) {
// If the code isn't optimized, there may be outstanding folding
// opportunities. Attempt to fold the expression using TargetData as a
// last resort before giving up.
if (Constant *C = ConstantFoldConstantExpression(CE, AP.TM.getTargetData()))
return LowerConstant(C, AP);
if (Constant *C =
ConstantFoldConstantExpression(CE, AP.TM.getTargetData()))
if (C != CE)
return LowerConstant(C, AP);
#ifndef NDEBUG
CE->dump();
#endif