Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/test/Transforms/NewGVN/2012-05-22-PreCrash.ll

@@ -0,0 +1,33 @@
+; RUN: opt < %s -newgvn
+; PR12858
+
+define void @fn5(i16 signext %p1, i8 signext %p2) nounwind uwtable {
+entry:
+  br i1 undef, label %if.else, label %if.then
+
+if.then:                                          ; preds = %entry
+  br label %if.end
+
+if.else:                                          ; preds = %entry
+  %conv = sext i16 %p1 to i32
+  br label %if.end
+
+if.end:                                           ; preds = %if.else, %if.then
+  %conv1 = sext i16 %p1 to i32
+  br i1 undef, label %if.then3, label %if.else4
+
+if.then3:                                         ; preds = %if.end
+  br label %if.end12
+
+if.else4:                                         ; preds = %if.end
+  %conv7 = sext i8 %p2 to i32
+  %cmp8 = icmp eq i32 %conv1, %conv7
+  br i1 %cmp8, label %if.then10, label %if.end12
+
+if.then10:                                        ; preds = %if.else4
+  br label %if.end12
+
+if.end12:                                         ; preds = %if.then10, %if.else4, %if.then3
+  %conv13 = sext i8 %p2 to i32
+  ret void
+}