Make sure adce is basically working!

llvm-svn: 6885

1 files changed, 43 insertions, 0 deletions

diff --git a/llvm/test/Regression/Transforms/ADCE/2003-06-24-BasicFunctionality.ll b/llvm/test/Regression/Transforms/ADCE/2003-06-24-BasicFunctionality.ll
new file mode 100644
index 00000000000..453723b1258
--- /dev/null
+++ b/llvm/test/Regression/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
+}