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 24 define void @f() personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) { 25 entry: 26 %tmp = alloca i32, align 4 27 %i7 = alloca i32, align 4 28 br label %for.cond 29 30 for.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 35 for.body: ; preds = %for.cond 36 %cond = icmp eq i32 %i.0, 3 37 br i1 %cond, label %if.then, label %for.inc 38 39 if.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 45 catch.dispatch: ; preds = %if.then 46 %tmp2 = catchswitch within none [label %catch, label %catch2] unwind to caller 47 48 catch: ; 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 52 catch2: ; preds = %catch.dispatch 53 %tmp4 = catchpad within %tmp2 [i8* null, i32 64, i8* null] 54 catchret from %tmp4 to label %for.end 55 56 for.inc: ; preds = %catch, %for.body 57 %inc = add nsw i32 %i.0, 1 58 br label %for.cond 59 60 for.end: ; preds = %catch2, %for.cond 61 ret void 62 63 unreachable: ; 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 93 declare void @_CxxThrowException(i8*, %eh.ThrowInfo*) 94 95 declare i32 @__CxxFrameHandler3(...) 96
