http://llvm.org/bugs/show_bug.cgi?id=17054
Bug ID: 17054
Summary: ObjectSizeOffsetVisitor::visitArgument failes to
return vaild result
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Global Analyses
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
When I used latest chunk to compile chromium project,it generated a deadLoop
when compiling file_util::ReadFromFD.I tried to debug,and find this bug was
caused by ObjectSizeOffsetVisitor::visitArgument.It originally looked like
SizeOffsetType ObjectSizeOffsetVisitor::visitArgument(Argument &A) {
// no interprocedural analysis is done at the moment
if (!A.hasByValAttr()) {
++ObjectVisitorArgument;
return unknown();
}
PointerType *PT = cast<PointerType>(A.getType());
APInt Size(IntTyBits, TD->getTypeAllocSize(PT->getElementType()));
return std::make_pair(align(Size, A.getParamAlignment()), Zero);
}
And I commented out
// if (!A.hasByValAttr()) {
// ++ObjectVisitorArgument;
// return unknown();
// }
Then the code was generated correctly.
The attachment is the code that causes trouble.
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