Could a gatekeeper please review this patch?
https://bugs.open64.net/show_bug.cgi?id=747
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.
Index: osprey/be/com/constraint_graph.cxx
===================================================================
--- osprey/be/com/constraint_graph.cxx (revision 3534)
+++ osprey/be/com/constraint_graph.cxx (working copy)
@@ -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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