vendor/llvm/llvm-r72732

1 files changed, 41 insertions, 0 deletions

diff --git a/test/Transforms/ADCE/2003-06-24-BasicFunctionality.ll b/test/Transforms/ADCE/2003-06-24-BasicFunctionality.ll
new file mode 100644
index 0000000000000..9c6764d562358
--- /dev/null
+++ b/test/Transforms/ADCE/2003-06-24-BasicFunctionality.ll
@@ -0,0 +1,41 @@
+; RUN: llvm-as < %s | opt -adce -simplifycfg | llvm-dis | not grep then:
+
+define void @dead_test8(i32* %data.1, i32 %idx.1) {
+entry:
+        %tmp.1 = load i32* %data.1              ; <i32> [#uses=2]
+        %tmp.41 = icmp sgt i32 %tmp.1, 0                ; <i1> [#uses=1]
+        br i1 %tmp.41, label %no_exit.preheader, label %return
+
+no_exit.preheader:              ; preds = %entry
+        %tmp.11 = getelementptr i32* %data.1, i64 1             ; <i32*> [#uses=1]
+        %tmp.22-idxcast = sext i32 %idx.1 to i64                ; <i64> [#uses=1]
+        %tmp.28 = getelementptr i32* %data.1, i64 %tmp.22-idxcast               ; <i32*> [#uses=1]
+        br label %no_exit
+
+no_exit:                ; preds = %endif, %no_exit.preheader
+        %k.1 = phi i32 [ %k.0, %endif ], [ 0, %no_exit.preheader ]              ; <i32> [#uses=3]
+        %i.0 = phi i32 [ %inc.1, %endif ], [ 0, %no_exit.preheader ]            ; <i32> [#uses=1]
+        %tmp.12 = load i32* %tmp.11             ; <i32> [#uses=1]
+        %tmp.14 = sub i32 0, %tmp.12            ; <i32> [#uses=1]
+        %tmp.161 = icmp ne i32 %k.1, %tmp.14            ; <i1> [#uses=1]
+        br i1 %tmp.161, label %then, label %else
+
+then:           ; preds = %no_exit
+        %inc.0 = add i32 %k.1, 1                ; <i32> [#uses=1]
+        br label %endif
+
+else:           ; preds = %no_exit
+        %dec = add i32 %k.1, -1         ; <i32> [#uses=1]
+        br label %endif
+
+endif:          ; preds = %else, %then
+        %k.0 = phi i32 [ %dec, %else ], [ %inc.0, %then ]               ; <i32> [#uses=1]
+        store i32 2, i32* %tmp.28
+        %inc.1 = add i32 %i.0, 1                ; <i32> [#uses=2]
+        %tmp.4 = icmp slt i32 %inc.1, %tmp.1            ; <i1> [#uses=1]
+        br i1 %tmp.4, label %no_exit, label %return
+
+return:         ; preds = %endif, %entry
+        ret void
+}
+