commit d3aa25e2a8b04853f03341b6275ef7718659b915
author Nick Lewycky <nicholas@mxc.ca> Mon Aug 17 05:37:31 2009 +0000
committer Nick Lewycky <nicholas@mxc.ca> Mon Aug 17 05:37:31 2009 +0000
tree 47450ebf141d6c3daf6a988af98a993f258206bd
parent 4113f2e1f1f50651b87d894e72f86faa3dcc970e

Don't crash trying to promote VLAs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79226 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/ScalarReplAggregates.cpp

diff --git a/lib/Transforms/Scalar/ScalarReplAggregates.cpp b/lib/Transforms/Scalar/ScalarReplAggregates.cpp
index 6857162..4f99ee8 100644
--- a/lib/Transforms/Scalar/ScalarReplAggregates.cpp
+++ b/lib/Transforms/Scalar/ScalarReplAggregates.cpp
@@ -255,9 +255,12 @@
     // value cannot be decomposed at all.
     uint64_t AllocaSize = TD->getTypeAllocSize(AI->getAllocatedType());
 
+    // Do not promote [0 x %struct].
+    if (AllocaSize == 0) continue;
+
     // Do not promote any struct whose size is too big.
     if (AllocaSize > SRThreshold) continue;
-        
+
     if ((isa<StructType>(AI->getAllocatedType()) ||
          isa<ArrayType>(AI->getAllocatedType())) &&
         // Do not promote any struct into more than "32" separate vars.