diff options
Diffstat (limited to 'llvm/lib/CodeGen/GlobalISel')
| -rw-r--r-- | llvm/lib/CodeGen/GlobalISel/InstructionSelector.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/GlobalISel/InstructionSelector.cpp b/llvm/lib/CodeGen/GlobalISel/InstructionSelector.cpp index 9149864817c..3b2177c72c4 100644 --- a/llvm/lib/CodeGen/GlobalISel/InstructionSelector.cpp +++ b/llvm/lib/CodeGen/GlobalISel/InstructionSelector.cpp @@ -43,6 +43,11 @@ bool InstructionSelector::constrainSelectedInstRegOperands( if (TRI.isPhysicalRegister(MO.getReg())) continue; + // Register operands with a value of 0 (e.g. predicate operands) don't need + // to be constrained. + if (MO.getReg() == 0) + continue; + const TargetRegisterClass *RC = TII.getRegClass(I.getDesc(), OpI, &TRI, MF); assert(RC && "Selected inst should have regclass operand"); |
