new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26086 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/bittest.ll b/test/Transforms/InstCombine/bittest.ll
new file mode 100644 (file)
index 0000000..db386f3
--- /dev/null
+++ b/test/Transforms/InstCombine/bittest.ll
@@ -0,0 +1,29 @@
+; RUN: llvm-as < %s | opt -instcombine -simplifycfg -disable-output &&
+; RUN: llvm-as < %s | opt -instcombine -simplifycfg | llvm-dis | not grep 'call void %abort'
+
+%b_rec.0 = external global int
+
+void %_Z12h000007_testv(uint *%P) {
+entry:
+        %tmp.2 = load int* %b_rec.0             ; <int> [#uses=1]
+        %tmp.9 = or int %tmp.2, -989855744              ; <int> [#uses=2]
+        %tmp.16 = and int %tmp.9, -805306369            ; <int> [#uses=2]
+        %tmp.17 = and int %tmp.9, -973078529            ; <int> [#uses=1]
+        store int %tmp.17, int* %b_rec.0
+        %tmp.17.shrunk = cast int %tmp.16 to uint               ; <uint> [#uses=1]
+        %tmp.22 = and uint %tmp.17.shrunk, 3221225472           ; <uint> [#uses=1]
+        %tmp.23 = seteq uint %tmp.22, 3221225472                ; <bool> [#uses=1]
+        br bool %tmp.23, label %endif.0, label %then.0
+
+then.0:         ; preds = %entry
+        tail call void %abort( )
+        unreachable
+
+endif.0:                ; preds = %entry
+        %tmp.17.shrunk2 = cast int %tmp.16 to uint              ; <uint> [#uses=1]
+        %tmp.27.mask = and uint %tmp.17.shrunk2, 100663295              ; <uint> [#uses=1]
+       store uint %tmp.27.mask, uint* %P
+        ret void
+}
+
+declare void %abort()