https://bugs.llvm.org/show_bug.cgi?id=45010
Bug ID: 45010
Summary: Assertion failed: !(isAtomic() && getAlignment() == 0)
&& "Alignment required for atomic load"
Product: clang
Version: 10.0
Hardware: PC
OS: Windows NT
Status: NEW
Severity: release blocker
Priority: P
Component: -New Bugs
Assignee: gchate...@google.com
Reporter: alexandre.ga...@ubisoft.com
CC: h...@chromium.org, htmldevelo...@gmail.com,
llvm-bugs@lists.llvm.org, neeil...@live.com,
richard-l...@metafoo.co.uk
Blocks: 44555
When compiling Clang with assertions enabled, I'm seeing the assert I've
mentioned here: https://reviews.llvm.org/D71547#1824272
Repro:
// a.cpp
// Build with: clang-cl a.cpp /c /O1
#include <vector>
struct SP {
void WeakAddRef();
void WeakRelease();
};
template <typename T> struct PtrBase {
T *volatile P;
~PtrBase() {
if (R)
R->WeakRelease();
}
PtrBase(const PtrBase &O) : R(O.R) {
if (R)
R->WeakAddRef();
}
SP *R;
bool IsValid() const { return P != nullptr; }
};
struct alignas(16) VectorSIMD4f {
float V;
};
unsigned __int64 countAF() {
class AF {
VectorSIMD4f B;
};
struct PD {
PtrBase<AF> P;
};
std::vector<PD> AFs;
unsigned __int64 C = 0;
for (auto A : AFs) {
if (A.P.IsValid())
++C;
}
return C;
}
Referenced Bugs:
https://bugs.llvm.org/show_bug.cgi?id=44555
[Bug 44555] [meta] 10.0.0 Release Blockers
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