1; RUN: llc %s -o - -verify-machineinstrs | FileCheck %s 2 3target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 4target triple = "x86_64-unknown-unknown" 5 6; The machine level BranchFolding pass will try to remove the 'unreachable' block 7; and rewrite 'entry' to jump to the block 'unreachable' falls through to. 8; That will be a landing pad and result in 'entry' jumping to 2 landing pads. 9; This tests that we don't do this change when the fallthrough is itself a landing 10; pad. 11 12declare i32 @__gxx_personality_v0(...) 13declare void @foo() 14 15; Function Attrs: noreturn 16declare void @_throw() 17 18; CHECK-LABEL: @main 19; CHECK: %unreachable 20 21define i32 @main(ptr %cleanup) personality ptr @__gxx_personality_v0 { 22entry: 23 invoke void @_throw() #0 24 to label %unreachable unwind label %catch.dispatch9 25 26catch.dispatch9: ; preds = %entry 27 %tmp13 = landingpad { ptr, i32 } 28 cleanup 29 catch ptr null 30 invoke void @_throw() #0 31 to label %unreachable unwind label %lpad31 32 33lpad31: ; preds = %catch.dispatch9 34 %tmp20 = landingpad { ptr, i32 } 35 cleanup 36 catch ptr null 37 call void @foo() 38 unreachable 39 40unreachable: ; preds = %catch.dispatch9, %entry 41 unreachable 42} 43 44attributes #0 = { noreturn } 45 46