Imported Upstream version 5.18.0.179

Former-commit-id: 67aa10e65b237e1c4537630979ee99ebe1374215

external/llvm/test/Transforms/InstCombine/bittest.ll

@@ -0,0 +1,30 @@
+; RUN: opt < %s -instcombine -simplifycfg -S |\
+; RUN:    not grep "call void @abort"
+
+@b_rec.0 = external global i32          ; <i32*> [#uses=2]
+
+define void @_Z12h000007_testv(i32* %P) {
+entry:
+        %tmp.2 = load i32, i32* @b_rec.0             ; <i32> [#uses=1]
+        %tmp.9 = or i32 %tmp.2, -989855744              ; <i32> [#uses=2]
+        %tmp.16 = and i32 %tmp.9, -805306369            ; <i32> [#uses=2]
+        %tmp.17 = and i32 %tmp.9, -973078529            ; <i32> [#uses=1]
+        store i32 %tmp.17, i32* @b_rec.0
+        %tmp.17.shrunk = bitcast i32 %tmp.16 to i32             ; <i32> [#uses=1]
+        %tmp.22 = and i32 %tmp.17.shrunk, -1073741824           ; <i32> [#uses=1]
+        %tmp.23 = icmp eq i32 %tmp.22, -1073741824              ; <i1> [#uses=1]
+        br i1 %tmp.23, label %endif.0, label %then.0
+
+then.0:         ; preds = %entry
+        tail call void @abort( )
+        unreachable
+
+endif.0:                ; preds = %entry
+        %tmp.17.shrunk2 = bitcast i32 %tmp.16 to i32            ; <i32> [#uses=1]
+        %tmp.27.mask = and i32 %tmp.17.shrunk2, 100663295               ; <i32> [#uses=1]
+        store i32 %tmp.27.mask, i32* %P
+        ret void
+}
+
+declare void @abort()
+