[mips][micromips] fix filling delay slots for PseudoIndirectBranch_MM

Filling a delay slot in 32bit jump instructions with a 16bit instruction
can cause issues. According to the documentation such an operation is
unpredictable.
This patch adds opcode Mips::PseudoIndirectBranch_MM alongside
Mips::PseudoIndirectBranch and other instructions that are expanded to jr
instruction and do not allow a 16bit instruction in their delay slots.

Patch by Mirko Brkusanin.

Differential Revision: https://reviews.llvm.org/D58507

llvm-svn: 354672

1 files changed, 1 insertions, 0 deletions

diff --git a/llvm/lib/Target/Mips/MipsDelaySlotFiller.cpp b/llvm/lib/Target/Mips/MipsDelaySlotFiller.cpp
index 7f619569ec2..a05c3870f02 100644
--- a/llvm/lib/Target/Mips/MipsDelaySlotFiller.cpp
+++ b/llvm/lib/Target/Mips/MipsDelaySlotFiller.cpp
@@ -725,6 +725,7 @@ bool MipsDelaySlotFiller::searchRange(MachineBasicBlock &MBB, IterTy Begin,
     // but we don't have enough information to make that decision.
      if (InMicroMipsMode && TII->getInstSizeInBytes(*CurrI) == 2 &&
         (Opcode == Mips::JR || Opcode == Mips::PseudoIndirectBranch ||
+         Opcode == Mips::PseudoIndirectBranch_MM ||
          Opcode == Mips::PseudoReturn || Opcode == Mips::TAILCALL))
       continue;
      // Instructions LWP/SWP and MOVEP should not be in a delay slot as that