1; RUN: llc < %s | FileCheck %s 2 3; Started from this code: 4; void f() { 5; try { 6; try { 7; throw 42; 8; } catch (int) { 9; } 10; try { 11; throw 42; 12; } catch (int) { 13; } 14; } catch (int) { 15; } 16; } 17 18; Don't tail merge the calls. 19; CHECK: calll __CxxThrowException@8 20; CHECK: calll __CxxThrowException@8 21 22; ModuleID = 'cppeh-pingpong.cpp' 23target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" 24target triple = "i686-pc-windows-msvc" 25 26%rtti.TypeDescriptor2 = type { ptr, ptr, [3 x i8] } 27%eh.CatchableType = type { i32, ptr, i32, i32, i32, i32, ptr } 28%eh.CatchableTypeArray.1 = type { i32, [1 x ptr] } 29%eh.ThrowInfo = type { i32, ptr, ptr, ptr } 30 31$"\01??_R0H@8" = comdat any 32 33$"_CT??_R0H@84" = comdat any 34 35$_CTA1H = comdat any 36 37$_TI1H = comdat any 38 39@"\01??_7type_info@@6B@" = external constant ptr 40@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { ptr @"\01??_7type_info@@6B@", ptr null, [3 x i8] c".H\00" }, comdat 41@"_CT??_R0H@84" = linkonce_odr unnamed_addr constant %eh.CatchableType { i32 1, ptr @"\01??_R0H@8", i32 0, i32 -1, i32 0, i32 4, ptr null }, section ".xdata", comdat 42@_CTA1H = linkonce_odr unnamed_addr constant %eh.CatchableTypeArray.1 { i32 1, [1 x ptr] [ptr @"_CT??_R0H@84"] }, section ".xdata", comdat 43@_TI1H = linkonce_odr unnamed_addr constant %eh.ThrowInfo { i32 0, ptr null, ptr null, ptr @_CTA1H }, section ".xdata", comdat 44 45define void @"\01?f@@YAXXZ"() #0 personality ptr @__CxxFrameHandler3 { 46entry: 47 %i = alloca i32, align 4 48 %tmp = alloca i32, align 4 49 %tmp1 = alloca i32, align 4 50 store i32 0, ptr %i, align 4 51 store i32 42, ptr %tmp, align 4 52 invoke void @_CxxThrowException(ptr %tmp, ptr @_TI1H) #1 53 to label %unreachable unwind label %catch.dispatch 54 55catch.dispatch: ; preds = %entry 56 %cs1 = catchswitch within none [label %catch] unwind label %catch.dispatch.7 57 58catch: ; preds = %catch.dispatch 59 %0 = catchpad within %cs1 [ptr @"\01??_R0H@8", i32 0, ptr null] 60 catchret from %0 to label %catchret.dest 61 62catchret.dest: ; preds = %catch 63 br label %try.cont 64 65try.cont: ; preds = %catchret.dest 66 store i32 42, ptr %tmp1, align 4 67 invoke void @_CxxThrowException(ptr %tmp1, ptr @_TI1H) #1 68 to label %unreachable unwind label %catch.dispatch.2 69 70catch.dispatch.2: ; preds = %try.cont 71 %cs2 = catchswitch within none [label %catch.4] unwind label %catch.dispatch.7 72 73catch.4: ; preds = %catch.dispatch.2 74 %1 = catchpad within %cs2 [ptr @"\01??_R0H@8", i32 0, ptr null] 75 catchret from %1 to label %catchret.dest.5 76 77catchret.dest.5: ; preds = %catch.4 78 br label %try.cont.6 79 80try.cont.6: ; preds = %catchret.dest.5 81 br label %try.cont.11 82 83catch.dispatch.7: 84 %cs3 = catchswitch within none [label %catch.9] unwind to caller 85 86catch.9: ; preds = %catch.dispatch.7 87 %2 = catchpad within %cs3 [ptr @"\01??_R0H@8", i32 0, ptr null] 88 catchret from %2 to label %catchret.dest.10 89 90catchret.dest.10: ; preds = %catch.9 91 br label %try.cont.11 92 93try.cont.11: ; preds = %catchret.dest.10, %try.cont.6 94 ret void 95 96unreachable: ; preds = %try.cont, %entry 97 unreachable 98} 99 100declare x86_stdcallcc void @_CxxThrowException(ptr, ptr) 101 102declare i32 @__CxxFrameHandler3(...) 103 104attributes #0 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 105attributes #1 = { noreturn } 106