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