Add tests for two types of traps that escape analysis

might one day fall into.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61549 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/FunctionAttrs/2008-12-31-NoCapture.ll b/test/Transforms/FunctionAttrs/2008-12-31-NoCapture.ll
index 86feb4318c6b0a5757e6bfde64042acd1cb8d2fe..61c607dc007ef603ecac57b42572ca714ccb960b 100644 (file)
--- a/test/Transforms/FunctionAttrs/2008-12-31-NoCapture.ll
+++ b/test/Transforms/FunctionAttrs/2008-12-31-NoCapture.ll
@@ -16,6 +16,29 @@ define void @c3(i32* %q) {
        ret void
 }
 
+define i1 @c4(i32* %q, i32 %bitno) {
+       %tmp = ptrtoint i32* %q to i32
+       %tmp2 = lshr i32 %tmp, %bitno
+       %bit = trunc i32 %tmp2 to i1
+       br i1 %bit, label %l1, label %l0
+l0:
+       ret i1 0 ; escaping value not caught by def-use chaining.
+l1:
+       ret i1 1 ; escaping value not caught by def-use chaining.
+}
+
+@lookup_table = global [2 x i1] [ i1 0, i1 1 ]
+
+define i1 @c5(i32* %q, i32 %bitno) {
+       %tmp = ptrtoint i32* %q to i32
+       %tmp2 = lshr i32 %tmp, %bitno
+       %bit = and i32 %tmp2, 1
+        ; subtle escape mechanism follows
+       %lookup = getelementptr [2 x i1]* @lookup_table, i32 0, i32 %bit
+       %val = load i1* %lookup
+       ret i1 %val
+}
+
 define i32 @nc1(i32* %q, i32* %p, i1 %b) {
 e:
        br label %l