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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 | e51b57bee0f63a49e0a016256cda63535b88684c (patch) | |
| tree | 1d3cebdc9c81d4283e8cfdb4a6e1cf202a1f75c3 /llvm/lib | |
| parent | 73fd7e3bee1c070a3a42673ce59acdbaef2549f9 (diff) | |
| download | bcm5719-llvm-e51b57bee0f63a49e0a016256cda63535b88684c.tar.gz bcm5719-llvm-e51b57bee0f63a49e0a016256cda63535b88684c.zip | |
ConstantFoldConstantExpression can theoretically return the original
expression; don't go into an infinite loop if it does.
llvm-svn: 95591
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp index 5f730e03c6f..2fbd8dc098a 100644 --- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp +++ b/llvm/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 |
