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Differential D143252 Diff 495466 llvm/lib/Target/WebAssembly/WebAssemblyExplicitLocals.cpp

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llvm/lib/Target/WebAssembly/WebAssemblyExplicitLocals.cpp

Show First 20 Lines • Show All 346 Lines • ▼ Show 20 Lines for (MachineInstr &MI : llvm::make_early_inc_range(MBB)) {
// Inline asm may have a def in the middle of the operands. Our contract // Inline asm may have a def in the middle of the operands. Our contract
// with inline asm register operands is to provide local indices as // with inline asm register operands is to provide local indices as
// immediates. // immediates.
if (MO.isDef()) { if (MO.isDef()) {
assert(MI.isInlineAsm()); assert(MI.isInlineAsm());
unsigned LocalId = getLocalId(Reg2Local, MFI, CurLocal, OldReg); unsigned LocalId = getLocalId(Reg2Local, MFI, CurLocal, OldReg);
// If this register operand is tied to another operand, we can't // If this register operand is tied to another operand, we can't
// change it to an immediate. Untie it first. // change it to an immediate. Untie it first.
MI.untieRegOperand(MI.getOperandNo(&MO)); MI.untieRegOperand(MO.getOperandNo());
MO.ChangeToImmediate(LocalId); MO.ChangeToImmediate(LocalId);
continue; continue;
} }
// If we see a stackified register, prepare to insert subsequent // If we see a stackified register, prepare to insert subsequent
// local.gets before the start of its tree. // local.gets before the start of its tree.
if (MFI.isVRegStackified(OldReg)) { if (MFI.isVRegStackified(OldReg)) {
InsertPt = findStartOfTree(MO, MRI, MFI); InsertPt = findStartOfTree(MO, MRI, MFI);
continue; continue;
} }
// Our contract with inline asm register operands is to provide local // Our contract with inline asm register operands is to provide local
// indices as immediates. // indices as immediates.
if (MI.isInlineAsm()) { if (MI.isInlineAsm()) {
unsigned LocalId = getLocalId(Reg2Local, MFI, CurLocal, OldReg); unsigned LocalId = getLocalId(Reg2Local, MFI, CurLocal, OldReg);
// Untie it first if this reg operand is tied to another operand. // Untie it first if this reg operand is tied to another operand.
MI.untieRegOperand(MI.getOperandNo(&MO)); MI.untieRegOperand(MO.getOperandNo());
MO.ChangeToImmediate(LocalId); MO.ChangeToImmediate(LocalId);
continue; continue;
} }
// Insert a local.get. // Insert a local.get.
unsigned LocalId = getLocalId(Reg2Local, MFI, CurLocal, OldReg); unsigned LocalId = getLocalId(Reg2Local, MFI, CurLocal, OldReg);
const TargetRegisterClass *RC = MRI.getRegClass(OldReg); const TargetRegisterClass *RC = MRI.getRegClass(OldReg);
Register NewReg = MRI.createVirtualRegister(RC); Register NewReg = MRI.createVirtualRegister(RC);
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