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207108d4a4
Dead code elimination during coalescing could cause a virtual register to be split into connected components. The following rewriting would be confused about the already joined copies present in the code, but without a corresponding value number in the live range. Erase all joined copies instantly when joining intervals such that the MI and LiveInterval representations are always in sync. llvm-svn: 157135
123 lines
4.3 KiB
LLVM
123 lines
4.3 KiB
LLVM
; RUN: llc < %s -verify-coalescing
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; PR12892
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;
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; Dead code elimination during coalesing causes a live range to split into two
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; virtual registers. Stale identity copies that had already been joined were
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; interfering with the liveness computations.
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target triple = "i386-pc-linux-gnu"
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define void @_ZN4llvm17AsmMatcherEmitter3runERNS_11raw_ostreamE() align 2 {
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invoke void @_ZNK4llvm13CodeGenTarget12getAsmParserEv()
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to label %1 unwind label %5
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; <label>:1 ; preds = %0
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invoke void @_ZNK4llvm6Record16getValueAsStringENS_9StringRefE()
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to label %4 unwind label %2
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; <label>:2 ; preds = %1
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%3 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
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cleanup
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unreachable
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; <label>:4 ; preds = %1
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invoke void @_ZN4llvm18isCurrentDebugTypeEPKc()
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to label %12 unwind label %7
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; <label>:5 ; preds = %0
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%6 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
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cleanup
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br label %33
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; <label>:7 ; preds = %4
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%8 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
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cleanup
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br label %9
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; <label>:9 ; preds = %28, %7
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%10 = phi { i8*, i32 } [ %29, %28 ], [ %8, %7 ]
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%11 = extractvalue { i8*, i32 } %10, 1
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invoke fastcc void @_ZN12_GLOBAL__N_114AsmMatcherInfoD2Ev()
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to label %32 unwind label %35
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; <label>:12 ; preds = %4
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invoke void @_ZNK4llvm13CodeGenTarget10getRegBankEv()
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to label %13 unwind label %16
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; <label>:13 ; preds = %12
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br label %14
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; <label>:14 ; preds = %20, %13
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%15 = icmp eq i32 undef, 0
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br i1 %15, label %20, label %18
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; <label>:16 ; preds = %12
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%17 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
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cleanup
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br label %26
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; <label>:18 ; preds = %14
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invoke void @_ZNSs4_Rep9_S_createEjjRKSaIcE()
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to label %19 unwind label %21
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; <label>:19 ; preds = %18
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unreachable
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; <label>:20 ; preds = %14
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br label %14
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; <label>:21 ; preds = %18
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%22 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
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cleanup
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%23 = extractvalue { i8*, i32 } %22, 1
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br i1 undef, label %26, label %24
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; <label>:24 ; preds = %21
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br i1 undef, label %25, label %26
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; <label>:25 ; preds = %24
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unreachable
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; <label>:26 ; preds = %24, %21, %16
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%27 = phi i32 [ 0, %16 ], [ %23, %21 ], [ %23, %24 ]
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invoke void @_ZNSt6vectorISt4pairISsSsESaIS1_EED1Ev()
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to label %28 unwind label %30
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; <label>:28 ; preds = %26
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%29 = insertvalue { i8*, i32 } undef, i32 %27, 1
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br label %9
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; <label>:30 ; preds = %26
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%31 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
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catch i8* null
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unreachable
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; <label>:32 ; preds = %9
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br label %33
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; <label>:33 ; preds = %32, %5
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%34 = phi i32 [ undef, %5 ], [ %11, %32 ]
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unreachable
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; <label>:35 ; preds = %9
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%36 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
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catch i8* null
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unreachable
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}
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declare void @_ZNK4llvm13CodeGenTarget12getAsmParserEv()
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declare i32 @__gxx_personality_v0(...)
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declare void @_ZNK4llvm6Record16getValueAsStringENS_9StringRefE()
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declare void @_ZN4llvm18isCurrentDebugTypeEPKc()
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declare fastcc void @_ZN12_GLOBAL__N_114AsmMatcherInfoD2Ev() unnamed_addr inlinehint align 2
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declare hidden void @_ZNSt6vectorISt4pairISsSsESaIS1_EED1Ev() unnamed_addr align 2
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declare void @_ZNSs4_Rep9_S_createEjjRKSaIcE()
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declare void @_ZNK4llvm13CodeGenTarget10getRegBankEv()
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