diff options
Diffstat (limited to 'llvm/lib/Target')
| -rw-r--r-- | llvm/lib/Target/WebAssembly/WebAssemblySetP2AlignOperands.cpp | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblySetP2AlignOperands.cpp b/llvm/lib/Target/WebAssembly/WebAssemblySetP2AlignOperands.cpp index 9ffd04e581d..4ebea68c58a 100644 --- a/llvm/lib/Target/WebAssembly/WebAssemblySetP2AlignOperands.cpp +++ b/llvm/lib/Target/WebAssembly/WebAssemblySetP2AlignOperands.cpp @@ -83,7 +83,7 @@ bool WebAssemblySetP2AlignOperands::runOnMachineFunction(MachineFunction &MF) { case WebAssembly::STORE16_I32: case WebAssembly::STORE8_I64: case WebAssembly::STORE16_I64: - case WebAssembly::STORE32_I64: + case WebAssembly::STORE32_I64: { assert(MI.getOperand(3).getImm() == 0 && "ISel should set p2align operands to 0"); assert(MI.hasOneMemOperand() && @@ -95,9 +95,15 @@ bool WebAssemblySetP2AlignOperands::runOnMachineFunction(MachineFunction &MF) { assert(MI.getDesc().OpInfo[3].OperandType == WebAssembly::OPERAND_P2ALIGN && "Load and store instructions should have a p2align operand"); - MI.getOperand(3).setImm( - Log2_64((*MI.memoperands_begin())->getAlignment())); + uint64_t P2Align = Log2_64((*MI.memoperands_begin())->getAlignment()); + + // WebAssembly does not currently support supernatural alignment. + P2Align = std::min( + P2Align, uint64_t(WebAssembly::GetDefaultP2Align(MI.getOpcode()))); + + MI.getOperand(3).setImm(P2Align); break; + } default: break; } |
