new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30157 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/TailDup/if-tail-dup.ll b/test/Transforms/TailDup/if-tail-dup.ll
new file mode 100644 (file)
index 0000000..69205ec
--- /dev/null
+++ b/test/Transforms/TailDup/if-tail-dup.ll
@@ -0,0 +1,57 @@
+; RUN: llvm-as < %s | opt -tailduplicate | llc -march=x86 | grep 'je ' &&
+; RUN: llvm-as < %s | opt -tailduplicate | llc -march=x86 | not grep jmp
+; This should have no unconditional jumps in it.  The C source is:
+
+;void foo(int c, int* P) {
+;  if (c & 1)  P[0] = 1;
+;  if (c & 2)  P[1] = 1;
+;  if (c & 4)  P[2] = 1;
+;  if (c & 8)  P[3] = 1;
+;}
+
+
+void %foo(int %c, int* %P) {
+entry:
+        %tmp1 = and int %c, 1           ; <int> [#uses=1]
+        %tmp1 = seteq int %tmp1, 0              ; <bool> [#uses=1]
+        br bool %tmp1, label %cond_next, label %cond_true
+
+cond_true:              ; preds = %entry
+        store int 1, int* %P
+        br label %cond_next
+
+cond_next:              ; preds = %entry, %cond_true
+        %tmp5 = and int %c, 2           ; <int> [#uses=1]
+        %tmp5 = seteq int %tmp5, 0              ; <bool> [#uses=1]
+        br bool %tmp5, label %cond_next10, label %cond_true6
+
+cond_true6:             ; preds = %cond_next
+        %tmp8 = getelementptr int* %P, int 1            ; <int*> [#uses=1]
+        store int 1, int* %tmp8
+        br label %cond_next10
+
+cond_next10:            ; preds = %cond_next, %cond_true6
+        %tmp13 = and int %c, 4          ; <int> [#uses=1]
+        %tmp13 = seteq int %tmp13, 0            ; <bool> [#uses=1]
+        br bool %tmp13, label %cond_next18, label %cond_true14
+
+cond_true14:            ; preds = %cond_next10
+        %tmp16 = getelementptr int* %P, int 2           ; <int*> [#uses=1]
+        store int 1, int* %tmp16
+        br label %cond_next18
+
+cond_next18:            ; preds = %cond_next10, %cond_true14
+        %tmp21 = and int %c, 8          ; <int> [#uses=1]
+        %tmp21 = seteq int %tmp21, 0            ; <bool> [#uses=1]
+        br bool %tmp21, label %return, label %cond_true22
+
+cond_true22:            ; preds = %cond_next18
+        %tmp24 = getelementptr int* %P, int 3           ; <int*> [#uses=1]
+        store int 1, int* %tmp24
+        ret void
+
+return:         ; preds = %cond_next18
+        ret void
+}
+
+