diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp index d890310ac50..0b04a6355a9 100644 --- a/llvm/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp +++ b/llvm/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp @@ -78,9 +78,10 @@ static void ImposeStackOrdering(MachineInstr *MI, MachineRegisterInfo &MRI) { ImposeStackInputOrdering(MI); // Also read the opaque EXPR_STACK register. - MI->addOperand(MachineOperand::CreateReg(WebAssembly::EXPR_STACK, - /*isDef=*/false, - /*isImp=*/true)); + if (!MI->readsRegister(WebAssembly::EXPR_STACK)) + MI->addOperand(MachineOperand::CreateReg(WebAssembly::EXPR_STACK, + /*isDef=*/false, + /*isImp=*/true)); // Also, mark any inputs to this instruction as being consumed by an // instruction on the expression stack. |
