Fix for PR5373, Credit to Jakub Staszak.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89758 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LoopUnswitch.cpp b/lib/Transforms/Scalar/LoopUnswitch.cpp
index 38d267a..382e261 100644
--- a/lib/Transforms/Scalar/LoopUnswitch.cpp
+++ b/lib/Transforms/Scalar/LoopUnswitch.cpp
@@ -296,7 +296,6 @@
// first exit.
if (ExitBB != 0) return false;
ExitBB = BB;
- return true;
}
// Otherwise, this is an unvisited intra-loop node. Check all successors.
diff --git a/test/Transforms/LoopUnswitch/5373.ll b/test/Transforms/LoopUnswitch/5373.ll
new file mode 100644
index 0000000..77b7835
--- /dev/null
+++ b/test/Transforms/LoopUnswitch/5373.ll
@@ -0,0 +1,24 @@
+; RUN: opt < %s -loop-unswitch -stats -disable-output |& grep "3 loop-unswitch - Number of branches unswitched"
+
+define noalias i32* @func_16(i32** %p_18, i32* %p_20) noreturn nounwind ssp {
+entry:
+ %lnot = icmp eq i32** %p_18, null ; <i1> [#uses=1]
+ %lnot6 = icmp eq i32* %p_20, null ; <i1> [#uses=1]
+ br label %for.body
+
+for.body: ; preds = %cond.end, %entry
+ br i1 %lnot, label %cond.end, label %cond.true
+
+cond.true: ; preds = %for.body
+ tail call void @f()
+ unreachable
+
+cond.end: ; preds = %for.body
+ br i1 %lnot6, label %for.body, label %cond.true10
+
+cond.true10: ; preds = %cond.end
+ tail call void @f()
+ unreachable
+}
+
+declare void @f() noreturn