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; RUN: llc < %s -verify-coalescing
; PR12892
;
; Dead code elimination during coalesing causes a live range to split into two
; virtual registers. Stale identity copies that had already been joined were
; interfering with the liveness computations.
target triple = "i386-pc-linux-gnu"
define void @_ZN4llvm17AsmMatcherEmitter3runERNS_11raw_ostreamE() align 2 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
invoke void @_ZNK4llvm13CodeGenTarget12getAsmParserEv()
to label %1 unwind label %5
; <label>:1 ; preds = %0
invoke void @_ZNK4llvm6Record16getValueAsStringENS_9StringRefE()
to label %4 unwind label %2
; <label>:2 ; preds = %1
%3 = landingpad { i8*, i32 }
cleanup
unreachable
; <label>:4 ; preds = %1
invoke void @_ZN4llvm18isCurrentDebugTypeEPKc()
to label %12 unwind label %7
; <label>:5 ; preds = %0
%6 = landingpad { i8*, i32 }
cleanup
br label %33
; <label>:7 ; preds = %4
%8 = landingpad { i8*, i32 }
cleanup
br label %9
; <label>:9 ; preds = %28, %7
%10 = phi { i8*, i32 } [ %29, %28 ], [ %8, %7 ]
%11 = extractvalue { i8*, i32 } %10, 1
invoke fastcc void @_ZN12_GLOBAL__N_114AsmMatcherInfoD2Ev()
to label %32 unwind label %35
; <label>:12 ; preds = %4
invoke void @_ZNK4llvm13CodeGenTarget10getRegBankEv()
to label %13 unwind label %16
; <label>:13 ; preds = %12
br label %14
; <label>:14 ; preds = %20, %13
%15 = icmp eq i32 undef, 0
br i1 %15, label %20, label %18
; <label>:16 ; preds = %12
%17 = landingpad { i8*, i32 }
cleanup
br label %26
; <label>:18 ; preds = %14
invoke void @_ZNSs4_Rep9_S_createEjjRKSaIcE()
to label %19 unwind label %21
; <label>:19 ; preds = %18
unreachable
; <label>:20 ; preds = %14
br label %14
; <label>:21 ; preds = %18
%22 = landingpad { i8*, i32 }
cleanup
%23 = extractvalue { i8*, i32 } %22, 1
br i1 undef, label %26, label %24
; <label>:24 ; preds = %21
br i1 undef, label %25, label %26
; <label>:25 ; preds = %24
unreachable
; <label>:26 ; preds = %24, %21, %16
%27 = phi i32 [ 0, %16 ], [ %23, %21 ], [ %23, %24 ]
invoke void @_ZNSt6vectorISt4pairISsSsESaIS1_EED1Ev()
to label %28 unwind label %30
; <label>:28 ; preds = %26
%29 = insertvalue { i8*, i32 } undef, i32 %27, 1
br label %9
; <label>:30 ; preds = %26
%31 = landingpad { i8*, i32 }
catch i8* null
unreachable
; <label>:32 ; preds = %9
br label %33
; <label>:33 ; preds = %32, %5
%34 = phi i32 [ undef, %5 ], [ %11, %32 ]
unreachable
; <label>:35 ; preds = %9
%36 = landingpad { i8*, i32 }
catch i8* null
unreachable
}
declare void @_ZNK4llvm13CodeGenTarget12getAsmParserEv()
declare i32 @__gxx_personality_v0(...)
declare void @_ZNK4llvm6Record16getValueAsStringENS_9StringRefE()
declare void @_ZN4llvm18isCurrentDebugTypeEPKc()
declare fastcc void @_ZN12_GLOBAL__N_114AsmMatcherInfoD2Ev() unnamed_addr inlinehint align 2
declare hidden void @_ZNSt6vectorISt4pairISsSsESaIS1_EED1Ev() unnamed_addr align 2
declare void @_ZNSs4_Rep9_S_createEjjRKSaIcE()
declare void @_ZNK4llvm13CodeGenTarget10getRegBankEv()
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