diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp b/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp index e7c758db092..da96f232b80 100644 --- a/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp +++ b/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp @@ -1394,6 +1394,13 @@ bool SimpleRegisterCoalescing::JoinCopy(CopyRec &TheCopy, bool &Again) { return false; // Not coalescable. } + // We cannot handle dual subreg indices and mismatched classes at the same + // time. + if (SrcSubIdx && DstSubIdx && differingRegisterClasses(SrcReg, DstReg)) { + DEBUG(dbgs() << "\tCannot handle subreg indices and mismatched classes.\n"); + return false; + } + // Check that a physical source register is compatible with dst regclass if (SrcIsPhys) { unsigned SrcSubReg = SrcSubIdx ? |
