New testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13067 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/LoopUnswitch/basictest.ll b/test/Transforms/LoopUnswitch/basictest.ll
new file mode 100644 (file)
index 0000000..12fef81
--- /dev/null
+++ b/test/Transforms/LoopUnswitch/basictest.ll
@@ -0,0 +1,35 @@
+; RUN: llvm-as < %s | opt -loop-unswitch -disable-output
+implementation   ; Functions:
+
+int %test(int* %A, bool %C) {
+entry:
+       br label %no_exit
+
+no_exit:               ; preds = %entry, %no_exit.backedge
+       %i.0.0 = phi uint [ 0, %entry ], [ %i.0.0.be, %no_exit.backedge ]               ; <uint> [#uses=3]
+       %tmp.7 = getelementptr int* %A, uint %i.0.0             ; <int*> [#uses=4]
+       %tmp.13 = load int* %tmp.7              ; <int> [#uses=1]
+       %tmp.14 = add int %tmp.13, 1            ; <int> [#uses=1]
+       store int %tmp.14, int* %tmp.7
+       br bool %C, label %then, label %endif
+
+then:          ; preds = %no_exit
+       %tmp.29 = load int* %tmp.7              ; <int> [#uses=1]
+       %tmp.30 = add int %tmp.29, 2            ; <int> [#uses=1]
+       store int %tmp.30, int* %tmp.7
+       %inc9 = add uint %i.0.0, 1              ; <uint> [#uses=2]
+       %tmp.112 = setlt uint %inc9, 100000             ; <bool> [#uses=1]
+       br bool %tmp.112, label %no_exit.backedge, label %return
+
+no_exit.backedge:              ; preds = %then, %endif
+       %i.0.0.be = phi uint [ %inc9, %then ], [ %inc, %endif ]         ; <uint> [#uses=1]
+       br label %no_exit
+
+endif:         ; preds = %no_exit
+       %inc = add uint %i.0.0, 1               ; <uint> [#uses=2]
+       %tmp.1 = setlt uint %inc, 100000                ; <bool> [#uses=1]
+       br bool %tmp.1, label %no_exit.backedge, label %return
+
+return:                ; preds = %then, %endif
+       ret int %tmp.13
+}