diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineInternal.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineInternal.h b/llvm/lib/Transforms/InstCombine/InstCombineInternal.h index 8c784ab1e68..fb2321df2e0 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineInternal.h +++ b/llvm/lib/Transforms/InstCombine/InstCombineInternal.h @@ -372,6 +372,10 @@ public: /// I to the worklist, replace all uses of I with the new value, then return /// I, so that the inst combiner will know that I was modified. Instruction *ReplaceInstUsesWith(Instruction &I, Value *V) { + // If there are no uses to replace, then we return nullptr to indicate that + // no changes were made to the program. + if (I.use_empty()) return nullptr; + Worklist.AddUsersToWorkList(I); // Add all modified instrs to worklist. // If we are replacing the instruction with itself, this must be in a |
