diff options
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index c2194c460f..d1561d68c6 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -10998,6 +10998,10 @@ Instruction *InstCombiner::visitPHINode(PHINode &PN) { PN.setIncomingValue(i, VB); PN.setIncomingBlock(j, BBA); PN.setIncomingValue(j, VA); + // NOTE: Instcombine normally would want us to "return &PN" if we + // modified any of the operands of an instruction. However, since we + // aren't adding or removing uses (just rearranging them) we don't do + // this in this case. } } |