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| author | Dan Gohman <gohman@apple.com> | 2010-02-08 22:19:11 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2010-02-08 22:19:11 +0000 |
| commit | 54e72eca0c5d012546fcc6d1fdac7ee56c90686c (patch) | |
| tree | 9763dc27aeb1ff532da1121a40ede42c0f48abb8 /lib/CodeGen | |
| parent | 25ceb5f3171b24459e86adf5e18cebaaabe247d3 (diff) | |
ConstantFoldConstantExpression can theoretically return the original
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
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/AsmPrinter/AsmPrinter.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp index 5f730e03c6..2fbd8dc098 100644 --- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp +++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp @@ -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 |