https://bugs.llvm.org/show_bug.cgi?id=42846
Bug ID: 42846
Summary: [X86] Assertion "Cannot merge volatile loads"
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: X86
Assignee: unassignedb...@nondot.org
Reporter: paul_robin...@playstation.sony.com
CC: craig.top...@gmail.com, llvm-bugs@lists.llvm.org,
llvm-...@redking.me.uk, spatel+l...@rotateright.com
Created attachment 22324
--> https://bugs.llvm.org/attachment.cgi?id=22324&action=edit
stack trace
$ cat t.cpp
typedef char __attribute__((ext_vector_type(2))) c;
typedef char __attribute__((ext_vector_type(32))) e;
void b(c x);
c j;
c k;
volatile e l, m;
void n() {
c o = __builtin_shufflevector(l, m, 0, 1), p(o);
j = o;
c a (k * p);
b(a);
}
$ clang -c -O2 t.cpp
clang-10:
/home/probinson/projects/llvm-org/llvm-project/llvm/lib/Target/X86/X86ISelLowering.cpp:7703:
EltsFromConsecutiveLoads(llvm::EVT, llvm::ArrayRef<llvm::SDValue>, const
llvm::SDLoc&, llvm::SelectionDAG&, const llvm::X86Subtarget&,
bool)::<lambda(llvm::EVT, llvm::LoadSDNode*)>: Assertion `!(MMOFlags &
MachineMemOperand::MOVolatile) && "Cannot merge volatile loads."' failed.
(see attachment for stack dump)
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