diff options
Diffstat (limited to 'llvm/lib/Target/RISCV/RISCVInstrInfo.td')
| -rw-r--r-- | llvm/lib/Target/RISCV/RISCVInstrInfo.td | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfo.td b/llvm/lib/Target/RISCV/RISCVInstrInfo.td index 7dedc0ffcc1..71e058f1958 100644 --- a/llvm/lib/Target/RISCV/RISCVInstrInfo.td +++ b/llvm/lib/Target/RISCV/RISCVInstrInfo.td @@ -757,6 +757,12 @@ def : Pat<(atomic_fence (i32 6), (imm)), (FENCE_TSO)>; // fence seq_cst -> fence rw, rw def : Pat<(atomic_fence (i32 7), (imm)), (FENCE 0b11, 0b11)>; +// Lowering for atomic load and store is defined in RISCVInstrInfoA.td. +// Although these are lowered to fence+load/store instructions defined in the +// base RV32I/RV64I ISA, this lowering is only used when the A extension is +// present. This is necessary as it isn't valid to mix __atomic_* libcalls +// with inline atomic operations for the same object. + /// Other pseudo-instructions // Pessimistically assume the stack pointer will be clobbered |
