PR1255(case ranges) related changes in Local Transformations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157315 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/Local.cpp b/lib/Transforms/Utils/Local.cpp
index 4e1a00f..179f29c 100644
--- a/lib/Transforms/Utils/Local.cpp
+++ b/lib/Transforms/Utils/Local.cpp
@@ -169,16 +169,20 @@
// Otherwise, we can fold this switch into a conditional branch
// instruction if it has only one non-default destination.
SwitchInst::CaseIt FirstCase = SI->case_begin();
- Value *Cond = Builder.CreateICmpEQ(SI->getCondition(),
- FirstCase.getCaseValue(), "cond");
+ ConstantRangesSet CRS = FirstCase.getCaseValueEx();
+ if (CRS.getNumItems() == 1 && CRS.isSingleNumber(0)) {
+ Value *Cond = Builder.CreateICmpEQ(SI->getCondition(),
+ CRS.getItem(0).Low, "cond");
- // Insert the new branch.
- Builder.CreateCondBr(Cond, FirstCase.getCaseSuccessor(),
- SI->getDefaultDest());
+ // Insert the new branch.
+ Builder.CreateCondBr(Cond, FirstCase.getCaseSuccessor(),
+ SI->getDefaultDest());
- // Delete the old switch.
- SI->eraseFromParent();
- return true;
+ // Delete the old switch.
+ SI->eraseFromParent();
+ return true;
+
+ }
}
return false;
}