Fix Generic/2005-10-18-ZeroSizeStackObject.ll by not requesting a zero

sized stack object if either the array size or the type size is zero.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23801 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 6b0e2b2011b73e60c0f93623e7cab1c1e2e64133..72ee7501082c499999cbb69b4772556fb82faf51 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -152,6 +152,7 @@ FunctionLoweringInfo::FunctionLoweringInfo(TargetLowering &tli,
         // TargetData.  It serves primarily to 8-byte align doubles for X86.
         if (Align < TySize && TySize <= 8) Align = TySize;
         TySize *= CUI->getValue();   // Get total allocated size.
+        if (TySize == 0) TySize = 1; // Don't create zero-sized stack objects.
         StaticAllocaMap[AI] =
           MF.getFrameInfo()->CreateStackObject((unsigned)TySize, Align);
       }