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
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 5f730e0..2fbd8dc 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -892,8 +892,10 @@
// 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