https://bugs.llvm.org/show_bug.cgi?id=33193
Bug ID: 33193
Summary: Crash due to unhandled cast causing an UNREACHABLE to
be executed at
llvm/include/llvm/CodeGen/BasicTTIImpl.h:590
Product: new-bugs
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: douglas_y...@playstation.sony.com
CC: llvm-bugs@lists.llvm.org
Commit r303763 started causing a crash to occur on one of our internal
codebases.
Consider the following code:
/***** repro.cpp ******/
struct d;
template < typename > class A;
class B
{
public:
typedef d *pointer;
pointer _Myfirst;
pointer _Mylast;
};
template < class = A < int >>class D:B
{
public:
long m_fn1 ()
{
return _Mylast - _Myfirst;
}
d & operator[] (long p1)
{
return *(_Myfirst + p1);
}
};
struct d
{
int m_hNodeID;
bool uw;
};
class C
{
void m_fn2 ();
D < >m_d;
};
void
C::m_fn2 ()
{
for (unsigned i = 0; i < m_d.m_fn1 (); ++i)
m_d[i].uw = false;
}
/***** repro.cpp ******/
If you compile the above with the following command:
clang.exe -cc1 -triple x86_64-scei-ps4 -emit-obj -O2 -vectorize-loops repro.cpp
You will see the following crash in the compiler:
Unhandled cast
UNREACHABLE executed at C:\src\llvm\include\llvm/CodeGen/BasicTTIImpl.h:590!
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