vendor/llvm/llvm-r126079

1 files changed, 24 insertions, 0 deletions

diff --git a/test/Transforms/LoopUnroll/basic.ll b/test/Transforms/LoopUnroll/basic.ll
new file mode 100644
index 0000000000000..eeb3e9a57b06c
--- /dev/null
+++ b/test/Transforms/LoopUnroll/basic.ll
@@ -0,0 +1,24 @@
+; RUN: opt < %s -loop-unroll -S | FileCheck %s
+
+
+; This should not unroll since the address of the loop header is taken.
+
+; CHECK: @test1
+; CHECK: store i8* blockaddress(@test1, %l1), i8** %P
+; CHECK: l1:
+; CHECK-NEXT: phi i32
+; rdar://8287027
+define i32 @test1(i8** %P) nounwind ssp {
+entry:
+  store i8* blockaddress(@test1, %l1), i8** %P
+  br label %l1
+
+l1:                                               ; preds = %l1, %entry
+  %x.0 = phi i32 [ 0, %entry ], [ %inc, %l1 ]
+  %inc = add nsw i32 %x.0, 1
+  %exitcond = icmp eq i32 %inc, 3
+  br i1 %exitcond, label %l2, label %l1
+
+l2:                                               ; preds = %l1
+  ret i32 0
+}