1 ; RUN: opt < %s -simplifycfg -S | \ 2 ; RUN: not grep select 3 4 ;; The PHI node in this example should not be turned into a select, as we are 5 ;; not able to ifcvt the entire block. As such, converting to a select just 6 ;; introduces inefficiency without saving copies. 7 8 define i32 @bar(i1 %C) { 9 entry: 10 br i1 %C, label %then, label %endif 11 then: ; preds = %entry 12 %tmp.3 = call i32 @qux( ) ; <i32> [#uses=0] 13 br label %endif 14 endif: ; preds = %then, %entry 15 %R = phi i32 [ 123, %entry ], [ 12312, %then ] ; <i32> [#uses=1] 16 ;; stuff to disable tail duplication 17 call i32 @qux( ) ; <i32>:0 [#uses=0] 18 call i32 @qux( ) ; <i32>:1 [#uses=0] 19 call i32 @qux( ) ; <i32>:2 [#uses=0] 20 call i32 @qux( ) ; <i32>:3 [#uses=0] 21 call i32 @qux( ) ; <i32>:4 [#uses=0] 22 call i32 @qux( ) ; <i32>:5 [#uses=0] 23 call i32 @qux( ) ; <i32>:6 [#uses=0] 24 ret i32 %R 25 } 26 27 declare i32 @qux() 28
