Verify that we don't optimize null return checks to the nothrow_t version of operator...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191325 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstSimplify/call.ll b/test/Transforms/InstSimplify/call.ll
index 89d4238101540d59d51363ed718f8d17e3da2498..fd854c5b46627305784c38b3a7440b252ee18cd8 100644 (file)
--- a/test/Transforms/InstSimplify/call.ll
+++ b/test/Transforms/InstSimplify/call.ll
@@ -122,6 +122,29 @@ cast.end:                                         ; preds = %cast.notnull, %entr
 
 declare noalias i8* @_Znwm(i64)
 
+%"struct.std::nothrow_t" = type { i8 }
+@_ZSt7nothrow = external global %"struct.std::nothrow_t"
+
+define i8* @operator_new_nothrow_t() {
+entry:
+  %call = tail call noalias i8* @_ZnamRKSt9nothrow_t(i64 8, %"struct.std::nothrow_t"* @_ZSt7nothrow)
+  %cmp = icmp eq i8* %call, null
+  br i1 %cmp, label %cast.end, label %cast.notnull
+
+cast.notnull:                                     ; preds = %entry
+  %add.ptr = getelementptr inbounds i8* %call, i64 4
+  br label %cast.end
+
+cast.end:                                         ; preds = %cast.notnull, %entry
+  %cast.result = phi i8* [ %add.ptr, %cast.notnull ], [ null, %entry ]
+  ret i8* %cast.result
+
+; CHECK-LABEL: @operator_new_nothrow_t
+; CHECK: br i1 %cmp, label %cast.end, label %cast.notnull
+}
+
+declare i8* @_ZnamRKSt9nothrow_t(i64, %"struct.std::nothrow_t"*) nounwind
+
 define i8* @malloc_can_return_null() {
 entry:
   %call = tail call noalias i8* @malloc(i64 8)