1; RUN: opt -lcssa -S < %s | FileCheck %s
2
3; This test is based on the following C++ code:
4;
5; void f()
6; {
7;   for (int i=0; i<12; i++) {
8;     try {
9;       if (i==3)
10;         throw i;
11;     } catch (int) {
12;       continue;
13;     } catch (...) { }
14;     if (i==3) break;
15;   }
16; }
17;
18; The loop info analysis identifies the catch pad for the second catch as being
19; outside the loop (because it returns to %for.end) but the associated
20; catchswitch block is identified as being inside the loop.  Because of this
21; analysis, the LCSSA pass wants to create a PHI node in the catchpad block
22; for the catchswitch value, but this is a token, so it can't.
23
24define void @f() personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
25entry:
26  %tmp = alloca i32, align 4
27  %i7 = alloca i32, align 4
28  br label %for.cond
29
30for.cond:                                         ; preds = %for.inc, %entry
31  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
32  %cmp = icmp slt i32 %i.0, 12
33  br i1 %cmp, label %for.body, label %for.end
34
35for.body:                                         ; preds = %for.cond
36  %cond = icmp eq i32 %i.0, 3
37  br i1 %cond, label %if.then, label %for.inc
38
39if.then:                                          ; preds = %for.body
40  store i32 %i.0, i32* %tmp, align 4
41  %tmp1 = bitcast i32* %tmp to i8*
42  invoke void @_CxxThrowException(i8* %tmp1, %eh.ThrowInfo* nonnull @_TI1H) #1
43          to label %unreachable unwind label %catch.dispatch
44
45catch.dispatch:                                   ; preds = %if.then
46  %tmp2 = catchswitch within none [label %catch, label %catch2] unwind to caller
47
48catch:                                            ; preds = %catch.dispatch
49  %tmp3 = catchpad within %tmp2 [%rtti.TypeDescriptor2* @"\01??_R0H@8", i32 0, i32* %i7]
50  catchret from %tmp3 to label %for.inc
51
52catch2:                                           ; preds = %catch.dispatch
53  %tmp4 = catchpad within %tmp2 [i8* null, i32 64, i8* null]
54  catchret from %tmp4 to label %for.end
55
56for.inc:                                          ; preds = %catch, %for.body
57  %inc = add nsw i32 %i.0, 1
58  br label %for.cond
59
60for.end:                                          ; preds = %catch2, %for.cond
61  ret void
62
63unreachable:                                      ; preds = %if.then
64  unreachable
65}
66
67; CHECK-LABEL: define void @f()
68; CHECK: catch2:
69; CHECK-NOT: phi
70; CHECK:   %tmp4 = catchpad within %tmp2
71; CHECK:   catchret from %tmp4 to label %for.end
72
73%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
74%eh.CatchableType = type { i32, i32, i32, i32, i32, i32, i32 }
75%eh.CatchableTypeArray.1 = type { i32, [1 x i32] }
76%eh.ThrowInfo = type { i32, i32, i32, i32 }
77
78$"\01??_R0H@8" = comdat any
79
80$"_CT??_R0H@84" = comdat any
81
82$_CTA1H = comdat any
83
84$_TI1H = comdat any
85
86@"\01??_7type_info@@6B@" = external constant i8*
87@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
88@__ImageBase = external constant i8
89@"_CT??_R0H@84" = linkonce_odr unnamed_addr constant %eh.CatchableType { i32 1, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32), i32 0, i32 -1, i32 0, i32 4, i32 0 }, section ".xdata", comdat
90@_CTA1H = linkonce_odr unnamed_addr constant %eh.CatchableTypeArray.1 { i32 1, [1 x i32] [i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%eh.CatchableType* @"_CT??_R0H@84" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32)] }, section ".xdata", comdat
91@_TI1H = linkonce_odr unnamed_addr constant %eh.ThrowInfo { i32 0, i32 0, i32 0, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%eh.CatchableTypeArray.1* @_CTA1H to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32) }, section ".xdata", comdat
92
93declare void @_CxxThrowException(i8*, %eh.ThrowInfo*)
94
95declare i32 @__CxxFrameHandler3(...)
96