xref: /aosp_15_r20/external/llvm/test/Transforms/LCSSA/mixed-catch.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58)
1*9880d681SAndroid Build Coastguard Worker; RUN: opt -lcssa -S < %s | FileCheck %s
2*9880d681SAndroid Build Coastguard Worker; RUN: opt -passes=lcssa -S < %s | FileCheck %s
3*9880d681SAndroid Build Coastguard Worker
4*9880d681SAndroid Build Coastguard Worker; This test is based on the following C++ code:
5*9880d681SAndroid Build Coastguard Worker;
6*9880d681SAndroid Build Coastguard Worker; void f()
7*9880d681SAndroid Build Coastguard Worker; {
8*9880d681SAndroid Build Coastguard Worker;   for (int i=0; i<12; i++) {
9*9880d681SAndroid Build Coastguard Worker;     try {
10*9880d681SAndroid Build Coastguard Worker;       if (i==3)
11*9880d681SAndroid Build Coastguard Worker;         throw i;
12*9880d681SAndroid Build Coastguard Worker;     } catch (int) {
13*9880d681SAndroid Build Coastguard Worker;       continue;
14*9880d681SAndroid Build Coastguard Worker;     } catch (...) { }
15*9880d681SAndroid Build Coastguard Worker;     if (i==3) break;
16*9880d681SAndroid Build Coastguard Worker;   }
17*9880d681SAndroid Build Coastguard Worker; }
18*9880d681SAndroid Build Coastguard Worker;
19*9880d681SAndroid Build Coastguard Worker; The loop info analysis identifies the catch pad for the second catch as being
20*9880d681SAndroid Build Coastguard Worker; outside the loop (because it returns to %for.end) but the associated
21*9880d681SAndroid Build Coastguard Worker; catchswitch block is identified as being inside the loop.  Because of this
22*9880d681SAndroid Build Coastguard Worker; analysis, the LCSSA pass wants to create a PHI node in the catchpad block
23*9880d681SAndroid Build Coastguard Worker; for the catchswitch value, but this is a token, so it can't.
24*9880d681SAndroid Build Coastguard Worker
25*9880d681SAndroid Build Coastguard Workerdefine void @f() personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
26*9880d681SAndroid Build Coastguard Workerentry:
27*9880d681SAndroid Build Coastguard Worker  %tmp = alloca i32, align 4
28*9880d681SAndroid Build Coastguard Worker  %i7 = alloca i32, align 4
29*9880d681SAndroid Build Coastguard Worker  br label %for.cond
30*9880d681SAndroid Build Coastguard Worker
31*9880d681SAndroid Build Coastguard Workerfor.cond:                                         ; preds = %for.inc, %entry
32*9880d681SAndroid Build Coastguard Worker  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
33*9880d681SAndroid Build Coastguard Worker  %cmp = icmp slt i32 %i.0, 12
34*9880d681SAndroid Build Coastguard Worker  br i1 %cmp, label %for.body, label %for.end
35*9880d681SAndroid Build Coastguard Worker
36*9880d681SAndroid Build Coastguard Workerfor.body:                                         ; preds = %for.cond
37*9880d681SAndroid Build Coastguard Worker  %cond = icmp eq i32 %i.0, 3
38*9880d681SAndroid Build Coastguard Worker  br i1 %cond, label %if.then, label %for.inc
39*9880d681SAndroid Build Coastguard Worker
40*9880d681SAndroid Build Coastguard Workerif.then:                                          ; preds = %for.body
41*9880d681SAndroid Build Coastguard Worker  store i32 %i.0, i32* %tmp, align 4
42*9880d681SAndroid Build Coastguard Worker  %tmp1 = bitcast i32* %tmp to i8*
43*9880d681SAndroid Build Coastguard Worker  invoke void @_CxxThrowException(i8* %tmp1, %eh.ThrowInfo* nonnull @_TI1H) #1
44*9880d681SAndroid Build Coastguard Worker          to label %unreachable unwind label %catch.dispatch
45*9880d681SAndroid Build Coastguard Worker
46*9880d681SAndroid Build Coastguard Workercatch.dispatch:                                   ; preds = %if.then
47*9880d681SAndroid Build Coastguard Worker  %tmp2 = catchswitch within none [label %catch, label %catch2] unwind to caller
48*9880d681SAndroid Build Coastguard Worker
49*9880d681SAndroid Build Coastguard Workercatch:                                            ; preds = %catch.dispatch
50*9880d681SAndroid Build Coastguard Worker  %tmp3 = catchpad within %tmp2 [%rtti.TypeDescriptor2* @"\01??_R0H@8", i32 0, i32* %i7]
51*9880d681SAndroid Build Coastguard Worker  catchret from %tmp3 to label %for.inc
52*9880d681SAndroid Build Coastguard Worker
53*9880d681SAndroid Build Coastguard Workercatch2:                                           ; preds = %catch.dispatch
54*9880d681SAndroid Build Coastguard Worker  %tmp4 = catchpad within %tmp2 [i8* null, i32 64, i8* null]
55*9880d681SAndroid Build Coastguard Worker  catchret from %tmp4 to label %for.end
56*9880d681SAndroid Build Coastguard Worker
57*9880d681SAndroid Build Coastguard Workerfor.inc:                                          ; preds = %catch, %for.body
58*9880d681SAndroid Build Coastguard Worker  %inc = add nsw i32 %i.0, 1
59*9880d681SAndroid Build Coastguard Worker  br label %for.cond
60*9880d681SAndroid Build Coastguard Worker
61*9880d681SAndroid Build Coastguard Workerfor.end:                                          ; preds = %catch2, %for.cond
62*9880d681SAndroid Build Coastguard Worker  ret void
63*9880d681SAndroid Build Coastguard Worker
64*9880d681SAndroid Build Coastguard Workerunreachable:                                      ; preds = %if.then
65*9880d681SAndroid Build Coastguard Worker  unreachable
66*9880d681SAndroid Build Coastguard Worker}
67*9880d681SAndroid Build Coastguard Worker
68*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: define void @f()
69*9880d681SAndroid Build Coastguard Worker; CHECK: catch2:
70*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: phi
71*9880d681SAndroid Build Coastguard Worker; CHECK:   %tmp4 = catchpad within %tmp2
72*9880d681SAndroid Build Coastguard Worker; CHECK:   catchret from %tmp4 to label %for.end
73*9880d681SAndroid Build Coastguard Worker
74*9880d681SAndroid Build Coastguard Worker%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
75*9880d681SAndroid Build Coastguard Worker%eh.CatchableType = type { i32, i32, i32, i32, i32, i32, i32 }
76*9880d681SAndroid Build Coastguard Worker%eh.CatchableTypeArray.1 = type { i32, [1 x i32] }
77*9880d681SAndroid Build Coastguard Worker%eh.ThrowInfo = type { i32, i32, i32, i32 }
78*9880d681SAndroid Build Coastguard Worker
79*9880d681SAndroid Build Coastguard Worker$"\01??_R0H@8" = comdat any
80*9880d681SAndroid Build Coastguard Worker
81*9880d681SAndroid Build Coastguard Worker$"_CT??_R0H@84" = comdat any
82*9880d681SAndroid Build Coastguard Worker
83*9880d681SAndroid Build Coastguard Worker$_CTA1H = comdat any
84*9880d681SAndroid Build Coastguard Worker
85*9880d681SAndroid Build Coastguard Worker$_TI1H = comdat any
86*9880d681SAndroid Build Coastguard Worker
87*9880d681SAndroid Build Coastguard Worker@"\01??_7type_info@@6B@" = external constant i8*
88*9880d681SAndroid Build Coastguard Worker@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
89*9880d681SAndroid Build Coastguard Worker@__ImageBase = external constant i8
90*9880d681SAndroid Build Coastguard Worker@"_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
91*9880d681SAndroid Build Coastguard Worker@_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
92*9880d681SAndroid Build Coastguard Worker@_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
93*9880d681SAndroid Build Coastguard Worker
94*9880d681SAndroid Build Coastguard Workerdeclare void @_CxxThrowException(i8*, %eh.ThrowInfo*)
95*9880d681SAndroid Build Coastguard Worker
96*9880d681SAndroid Build Coastguard Workerdeclare i32 @__CxxFrameHandler3(...)
97