Author: shihui
Date: 2011-04-07 22:01:04 -0400 (Thu, 07 Apr 2011)
New Revision: 3542
Modified:
trunk/osprey/be/com/constraint_graph.cxx
Log:
Fix bug747:
Signal Floating point exception in phase Data Layout
Exception happens in StInfo::applyModulus(UINT32 offset, UINT32 &start),
modulus value is zero.
In test case struct M's size is 0. Then when setup the child modulus range for
strut S, the modulus value is 0.
This is not supposing happen, in StInfo::init if array element is zero length,
change the modulus value to 1.
Fix is in ModulusRange::build if structure's array element size is 0, change
modulus value to 1.
Code Review: Jian-Xin
Modified: trunk/osprey/be/com/constraint_graph.cxx
===================================================================
--- trunk/osprey/be/com/constraint_graph.cxx 2011-04-08 01:51:30 UTC (rev
3541)
+++ trunk/osprey/be/com/constraint_graph.cxx 2011-04-08 02:01:04 UTC (rev
3542)
@@ -269,6 +269,9 @@
while (TY_kind(Ty_Table[etyIdx]) == KIND_ARRAY)
etyIdx = TY_etype(Ty_Table[etyIdx]);
UINT32 elmtSize = TY_size(Ty_Table[etyIdx]);
+ // same handling as StInfo::init
+ if (elmtSize == 0)
+ elmtSize = 1;
newRange =
CXX_NEW(ModulusRange(start,end,elmtSize,FLD_type(fld)),memPool);
}
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