diff options
Diffstat (limited to 'llvm/lib/CodeGen/RegisterCoalescer.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/RegisterCoalescer.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/RegisterCoalescer.cpp b/llvm/lib/CodeGen/RegisterCoalescer.cpp index 9a689e9a17c..2cef900d8b7 100644 --- a/llvm/lib/CodeGen/RegisterCoalescer.cpp +++ b/llvm/lib/CodeGen/RegisterCoalescer.cpp @@ -2627,6 +2627,12 @@ JoinVals::analyzeValue(unsigned ValNo, JoinVals &Other) { return CR_Erase; } + // The remaining checks apply to the lanes, which aren't tracked here. This + // was already decided to be OK via the following CR_Replace condition. + // CR_Replace. + if (SubRangeJoin) + return CR_Replace; + // If the lanes written by this instruction were all undef in OtherVNI, it is // still safe to join the live ranges. This can't be done with a simple value // mapping, though - OtherVNI will map to multiple values: |
