1 ; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
3 ; Teach CGP to dup returns to enable tail call optimization.
6 define i32 @foo(i32 %x) nounwind ssp {
9 switch i32 %x, label %return [
18 sw.bb: ; preds = %entry
20 %call = tail call i32 @f1() nounwind
23 sw.bb1: ; preds = %entry
25 %call2 = tail call i32 @f2() nounwind
28 sw.bb3: ; preds = %entry
30 %call4 = tail call i32 @f3() nounwind
33 sw.bb5: ; preds = %entry
35 %call6 = tail call i32 @f4() nounwind
38 sw.bb7: ; preds = %entry
40 %call8 = tail call i32 @f5() nounwind
43 sw.bb9: ; preds = %entry
45 %call10 = tail call i32 @f6() nounwind
48 return: ; preds = %entry, %sw.bb9, %sw.bb7, %sw.bb5, %sw.bb3, %sw.bb1, %sw.bb
49 %retval.0 = phi i32 [ %call10, %sw.bb9 ], [ %call8, %sw.bb7 ], [ %call6, %sw.bb5 ], [ %call4, %sw.bb3 ], [ %call2, %sw.bb1 ], [ %call, %sw.bb ], [ 0, %entry ]
68 declare i8* @bar(i8*) uwtable optsize noinline ssp
70 define hidden %0* @thingWithValue(i8* %self) uwtable ssp {
72 ; CHECK-LABEL: thingWithValue:
74 br i1 undef, label %if.then.i, label %if.else.i
76 if.then.i: ; preds = %entry
77 br label %someThingWithValue.exit
79 if.else.i: ; preds = %entry
80 %call4.i = tail call i8* @bar(i8* undef) optsize
81 br label %someThingWithValue.exit
83 someThingWithValue.exit: ; preds = %if.else.i, %if.then.i
84 %retval.0.in.i = phi i8* [ undef, %if.then.i ], [ %call4.i, %if.else.i ]
85 %retval.0.i = bitcast i8* %retval.0.in.i to %0*