Make sure adce is basically working!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6885 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/ADCE/2003-06-24-BasicFunctionality.ll b/test/Transforms/ADCE/2003-06-24-BasicFunctionality.ll
new file mode 100644 (file)
index 0000000..453723b
--- /dev/null
+++ b/test/Transforms/ADCE/2003-06-24-BasicFunctionality.ll
@@ -0,0 +1,43 @@
+; RUN: if as < %s | opt -adce -simplifycfg | dis | grep then:
+; RUN: then exit 1
+; RUN: else exit 0
+; RUN: fi
+
+void %dead_test8(int* %data.1, int %idx.1) {
+entry:         ; No predecessors!
+       %tmp.1 = load int* %data.1              ; <int> [#uses=2]
+       %tmp.41 = setgt int %tmp.1, 0           ; <bool> [#uses=1]
+       br bool %tmp.41, label %no_exit.preheader, label %return
+
+no_exit.preheader:             ; preds = %entry
+       %tmp.11 = getelementptr int* %data.1, long 1            ; <int*> [#uses=1]
+       %tmp.22-idxcast = cast int %idx.1 to long               ; <long> [#uses=1]
+       %tmp.28 = getelementptr int* %data.1, long %tmp.22-idxcast              ; <int*> [#uses=1]
+       br label %no_exit
+
+no_exit:               ; preds = %no_exit.preheader, %endif
+       %k.1 = phi int [ %k.0, %endif ], [ 0, %no_exit.preheader ]              ; <int> [#uses=3]
+       %i.0 = phi int [ %inc.1, %endif ], [ 0, %no_exit.preheader ]            ; <int> [#uses=1]
+       %tmp.12 = load int* %tmp.11             ; <int> [#uses=1]
+       %tmp.14 = sub int 0, %tmp.12            ; <int> [#uses=1]
+       %tmp.161 = setne int %k.1, %tmp.14              ; <bool> [#uses=1]
+       br bool %tmp.161, label %then, label %else
+
+then:          ; preds = %no_exit
+       %inc.0 = add int %k.1, 1                ; <int> [#uses=1]
+       br label %endif
+
+else:          ; preds = %no_exit
+       %dec = add int %k.1, -1         ; <int> [#uses=1]
+       br label %endif
+
+endif:         ; preds = %else, %then
+       %k.0 = phi int [ %dec, %else ], [ %inc.0, %then ]               ; <int> [#uses=1]
+       store int 2, int* %tmp.28
+       %inc.1 = add int %i.0, 1                ; <int> [#uses=2]
+       %tmp.4 = setlt int %inc.1, %tmp.1               ; <bool> [#uses=1]
+       br bool %tmp.4, label %no_exit, label %return
+
+return:                ; preds = %entry, %endif
+       ret void
+}