new testcase for PR957

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31060 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/SimplifyCFG/2006-10-19-UncondDiv.ll b/test/Transforms/SimplifyCFG/2006-10-19-UncondDiv.ll
new file mode 100644 (file)
index 0000000..b8946dc
--- /dev/null
+++ b/test/Transforms/SimplifyCFG/2006-10-19-UncondDiv.ll
@@ -0,0 +1,35 @@
+; RUN: llvm-as < %s | opt -simplifycfg -disable-output &&
+; RUN: llvm-as < %s | opt -simplifycfg | llvm-dis | not grep select
+
+; PR957
+
+uint %test(uint %tmp) {
+cond_false179:          ; preds = %cond_true
+        %tmp181 = seteq uint %tmp, 0            ; <bool> [#uses=1]
+        br bool %tmp181, label %cond_true182, label %cond_next185
+
+cond_true182:           ; preds = %cond_false179
+        br label %cond_next185
+
+cond_next185:           ; preds = %cond_true182, %cond_false179
+        %d0.3 = phi uint [ div (uint 1, uint 0), %cond_true182 ], [ %tmp,
+%cond_false179 ]                ; <uint> [#uses=7]
+
+        ret uint %d0.3
+}
+
+uint %test2(uint %tmp) {
+cond_false179:          ; preds = %cond_true
+        %tmp181 = seteq uint %tmp, 0            ; <bool> [#uses=1]
+        br bool %tmp181, label %cond_true182, label %cond_next185
+
+cond_true182:           ; preds = %cond_false179
+        br label %cond_next185
+
+cond_next185:           ; preds = %cond_true182, %cond_false179
+        %d0.3 = phi uint [ div (uint 1, uint 0), %cond_true182 ], [ %tmp,
+%cond_false179 ]                ; <uint> [#uses=7]
+       call uint %test(uint 4)
+        ret uint %d0.3
+}
+