diff options
Diffstat (limited to 'llvm/lib/CodeGen/LiveDebugValues.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/LiveDebugValues.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/LiveDebugValues.cpp b/llvm/lib/CodeGen/LiveDebugValues.cpp index 3e079d6774e..f956974b1aa 100644 --- a/llvm/lib/CodeGen/LiveDebugValues.cpp +++ b/llvm/lib/CodeGen/LiveDebugValues.cpp @@ -373,8 +373,12 @@ void LiveDebugValues::transferRegisterDef(MachineInstr &MI, unsigned SP = TLI->getStackPointerRegisterToSaveRestore(); SparseBitVector<> KillSet; for (const MachineOperand &MO : MI.operands()) { + // Determine whether the operand is a register def. Assume that call + // instructions never clobber SP, because some backends (e.g., AArch64) + // never list SP in the regmask. if (MO.isReg() && MO.isDef() && MO.getReg() && - TRI->isPhysicalRegister(MO.getReg())) { + TRI->isPhysicalRegister(MO.getReg()) && + !(MI.isCall() && MO.getReg() == SP)) { // Remove ranges of all aliased registers. for (MCRegAliasIterator RAI(MO.getReg(), TRI, true); RAI.isValid(); ++RAI) for (unsigned ID : OpenRanges.getVarLocs()) |
