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 25define void @f() personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) { 26entry: 27 %tmp = alloca i32, align 4 28 %i7 = alloca i32, align 4 29 br label %for.cond 30 31for.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 36for.body: ; preds = %for.cond 37 %cond = icmp eq i32 %i.0, 3 38 br i1 %cond, label %if.then, label %for.inc 39 40if.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 46catch.dispatch: ; preds = %if.then 47 %tmp2 = catchswitch within none [label %catch, label %catch2] unwind to caller 48 49catch: ; 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 53catch2: ; preds = %catch.dispatch 54 %tmp4 = catchpad within %tmp2 [i8* null, i32 64, i8* null] 55 catchret from %tmp4 to label %for.end 56 57for.inc: ; preds = %catch, %for.body 58 %inc = add nsw i32 %i.0, 1 59 br label %for.cond 60 61for.end: ; preds = %catch2, %for.cond 62 ret void 63 64unreachable: ; 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 94declare void @_CxxThrowException(i8*, %eh.ThrowInfo*) 95 96declare i32 @__CxxFrameHandler3(...) 97