diff options
Diffstat (limited to 'llvm/lib/Target/ARM/ARMISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMISelLowering.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp index ca6b614ce2e..97b62264462 100644 --- a/llvm/lib/Target/ARM/ARMISelLowering.cpp +++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp @@ -11086,6 +11086,9 @@ bool ARMTargetLowering::shouldExpandAtomicStoreInIR(StoreInst *SI) const { // are doomed anyway, so defer to the default libcall and blame the OS when // things go wrong. Cortex M doesn't have ldrexd/strexd though, so don't emit // anything for those. +// FIXME: ldrd and strd are atomic if the CPU has LPAE (e.g. A15 has that +// guarantee, see DDI0406C ARM architecture reference manual, +// sections A8.8.72-74 LDRD) bool ARMTargetLowering::shouldExpandAtomicLoadInIR(LoadInst *LI) const { unsigned Size = LI->getType()->getPrimitiveSizeInBits(); return (Size == 64) && !Subtarget->isMClass(); |
