diff options
Diffstat (limited to 'lib/Target/Mips/MipsSEISelDAGToDAG.cpp')
| -rw-r--r-- | lib/Target/Mips/MipsSEISelDAGToDAG.cpp | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/lib/Target/Mips/MipsSEISelDAGToDAG.cpp b/lib/Target/Mips/MipsSEISelDAGToDAG.cpp index a598c3f..6daa632 100644 --- a/lib/Target/Mips/MipsSEISelDAGToDAG.cpp +++ b/lib/Target/Mips/MipsSEISelDAGToDAG.cpp @@ -948,7 +948,6 @@ SelectInlineAsmMemoryOperand(const SDValue &Op, unsigned ConstraintID, llvm_unreachable("Unexpected asm memory constraint"); // All memory constraints can at least accept raw pointers. case InlineAsm::Constraint_i: - case InlineAsm::Constraint_R: OutOps.push_back(Op); OutOps.push_back(CurDAG->getTargetConstant(0, MVT::i32)); return false; @@ -961,6 +960,20 @@ SelectInlineAsmMemoryOperand(const SDValue &Op, unsigned ConstraintID, OutOps.push_back(Op); OutOps.push_back(CurDAG->getTargetConstant(0, MVT::i32)); return false; + case InlineAsm::Constraint_R: + // The 'R' constraint is supposed to be much more complicated than this. + // However, it's becoming less useful due to architectural changes and + // ought to be replaced by other constraints such as 'ZC'. + // For now, support 9-bit signed offsets which is supportable by all + // subtargets for all instructions. + if (selectAddrRegImm9(Op, Base, Offset)) { + OutOps.push_back(Base); + OutOps.push_back(Offset); + return false; + } + OutOps.push_back(Op); + OutOps.push_back(CurDAG->getTargetConstant(0, MVT::i32)); + return false; case InlineAsm::Constraint_ZC: // ZC matches whatever the pref, ll, and sc instructions can handle for the // given subtarget. |