// Disallow calls which expose returns-twice to a function not previously
// attributed as such.
- if (ReturnsTwice && CS.isCall() &&
+ if (!ReturnsTwice && CS.isCall() &&
cast<CallInst>(CS.getInstruction())->canReturnTwice())
return false;
}
call void @inner2( i32 %N )
ret void
}
+
+declare i32 @a() returns_twice
+declare i32 @b() returns_twice
+
+define i32 @inner3() alwaysinline {
+entry:
+ %call = call i32 @a() returns_twice
+ %add = add nsw i32 1, %call
+ ret i32 %add
+}
+define i32 @outer3() {
+entry:
+; CHECK: @outer3
+; CHECK-NOT: call i32 @a
+; CHECK: ret
+
+ %call = call i32 @inner3()
+ %add = add nsw i32 1, %call
+ ret i32 %add
+}
+
+define i32 @inner4() alwaysinline returns_twice {
+entry:
+ %call = call i32 @b() returns_twice
+ %add = add nsw i32 1, %call
+ ret i32 %add
+}
+
+define i32 @outer4() {
+entry:
+; CHECK: @outer4
+; CHECK: call i32 @b()
+; CHECK: ret
+
+ %call = call i32 @inner4() returns_twice
+ %add = add nsw i32 1, %call
+ ret i32 %add
+}