; RUN: llc -march=x86 < %s -verify-machineinstrs
; RUN: llc -march=x86-64 < %s -verify-machineinstrs

; PR6497

; Chain and flag folding issues.
define i32 @test1() nounwind ssp {
entry:
  %tmp5.i = load volatile i32* undef              ; <i32> [#uses=1]
  %conv.i = zext i32 %tmp5.i to i64               ; <i64> [#uses=1]
  %tmp12.i = load volatile i32* undef             ; <i32> [#uses=1]
  %conv13.i = zext i32 %tmp12.i to i64            ; <i64> [#uses=1]
  %shl.i = shl i64 %conv13.i, 32                  ; <i64> [#uses=1]
  %or.i = or i64 %shl.i, %conv.i                  ; <i64> [#uses=1]
  %add16.i = add i64 %or.i, 256                   ; <i64> [#uses=1]
  %shr.i = lshr i64 %add16.i, 8                   ; <i64> [#uses=1]
  %conv19.i = trunc i64 %shr.i to i32             ; <i32> [#uses=1]
  store volatile i32 %conv19.i, i32* undef
  ret i32 undef
}

; PR6533
define void @test2(i1 %x, i32 %y) nounwind {
  %land.ext = zext i1 %x to i32                   ; <i32> [#uses=1]
  %and = and i32 %y, 1                        ; <i32> [#uses=1]
  %xor = xor i32 %and, %land.ext                  ; <i32> [#uses=1]
  %cmp = icmp eq i32 %xor, 1                      ; <i1> [#uses=1]
  br i1 %cmp, label %if.end, label %if.then

if.then:                                          ; preds = %land.end
  ret void

if.end:                                           ; preds = %land.end
  ret void
}

; PR6577
%pair = type { i64, double }

define void @test3() {
dependentGraph243.exit:
  %subject19 = load %pair* undef                     ; <%1> [#uses=1]
  %0 = extractvalue %pair %subject19, 1              ; <double> [#uses=2]
  %1 = select i1 undef, double %0, double undef   ; <double> [#uses=1]
  %2 = select i1 undef, double %1, double %0      ; <double> [#uses=1]
  %3 = insertvalue %pair undef, double %2, 1         ; <%1> [#uses=1]
  store %pair %3, %pair* undef
  ret void
}

; PR6605
define i64 @test4(i8* %P) nounwind ssp {
entry:
  %tmp1 = load i8* %P                           ; <i8> [#uses=3]
  %tobool = icmp eq i8 %tmp1, 0                   ; <i1> [#uses=1]
  %tmp58 = sext i1 %tobool to i8                  ; <i8> [#uses=1]
  %mul.i = and i8 %tmp58, %tmp1                   ; <i8> [#uses=1]
  %conv6 = zext i8 %mul.i to i32                  ; <i32> [#uses=1]
  %cmp = icmp ne i8 %tmp1, 1                      ; <i1> [#uses=1]
  %conv11 = zext i1 %cmp to i32                   ; <i32> [#uses=1]
  %call12 = tail call i32 @safe(i32 %conv11) nounwind ; <i32> [#uses=1]
  %and = and i32 %conv6, %call12                  ; <i32> [#uses=1]
  %tobool13 = icmp eq i32 %and, 0                 ; <i1> [#uses=1]
  br i1 %tobool13, label %if.else, label %return

if.else:                                          ; preds = %entry
  br label %return

return:                                           ; preds = %if.else, %entry
  ret i64 undef
}

declare i32 @safe(i32)

; PR6607
define fastcc void @test5(i32 %FUNC) nounwind {
foo:
  %0 = load i8* undef, align 1                    ; <i8> [#uses=3]
  %1 = sext i8 %0 to i32                          ; <i32> [#uses=2]
  %2 = zext i8 %0 to i32                          ; <i32> [#uses=1]
  %tmp1.i5037 = urem i32 %2, 10                   ; <i32> [#uses=1]
  %tmp.i5038 = icmp ugt i32 %tmp1.i5037, 15       ; <i1> [#uses=1]
  %3 = zext i1 %tmp.i5038 to i8                   ; <i8> [#uses=1]
  %4 = icmp slt i8 %0, %3                         ; <i1> [#uses=1]
  %5 = add nsw i32 %1, 256                        ; <i32> [#uses=1]
  %storemerge.i.i57 = select i1 %4, i32 %5, i32 %1 ; <i32> [#uses=1]
  %6 = shl i32 %storemerge.i.i57, 16              ; <i32> [#uses=1]
  %7 = sdiv i32 %6, -256                          ; <i32> [#uses=1]
  %8 = trunc i32 %7 to i8                         ; <i8> [#uses=1]
  store i8 %8, i8* undef, align 1
  ret void
}


; Crash commoning identical asms.
; PR6803
define void @test6(i1 %C) nounwind optsize ssp {
entry:
  br i1 %C, label %do.body55, label %do.body92

do.body55:                                        ; preds = %if.else36
  call void asm sideeffect "foo", "~{dirflag},~{fpsr},~{flags}"() nounwind, !srcloc !0
  ret void

do.body92:                                        ; preds = %if.then66
  call void asm sideeffect "foo", "~{dirflag},~{fpsr},~{flags}"() nounwind, !srcloc !1
  ret void
}

!0 = metadata !{i32 633550}                       
!1 = metadata !{i32 634261}                       


; Crash during XOR optimization.
; <rdar://problem/7869290>

define void @test7() nounwind ssp {
entry:
  br i1 undef, label %bb14, label %bb67

bb14:
  %tmp0 = trunc i16 undef to i1
  %tmp1 = load i8* undef, align 8
  %tmp2 = shl i8 %tmp1, 4
  %tmp3 = lshr i8 %tmp2, 7
  %tmp4 = trunc i8 %tmp3 to i1
  %tmp5 = icmp ne i1 %tmp0, %tmp4
  br i1 %tmp5, label %bb14, label %bb67

bb67:
  ret void
}

; Crash when trying to copy AH to AL.
; PR7540
define void @copy8bitregs() nounwind {
entry:
  %div.i = sdiv i32 115200, 0
  %shr8.i = lshr i32 %div.i, 8
  %conv4.i = trunc i32 %shr8.i to i8
  call void asm sideeffect "outb $0, ${1:w}", "{ax},N{dx},~{dirflag},~{fpsr},~{flags}"(i8 %conv4.i, i32 1017) nounwind
  unreachable
}

; Crash trying to form conditional increment with fp value.
; PR8981
define i32 @test9(double %X) ssp align 2 {
entry:
  %0 = fcmp one double %X, 0.000000e+00
  %cond = select i1 %0, i32 1, i32 2
  ret i32 %cond
}


; PR8514 - Crash in match address do to "heroics" turning and-of-shift into
; shift of and.
%struct.S0 = type { i8, [2 x i8], i8 }

define void @func_59(i32 %p_63) noreturn nounwind {
entry:
  br label %for.body

for.body:                                         ; preds = %for.inc44, %entry
  %p_63.addr.1 = phi i32 [ %p_63, %entry ], [ 0, %for.inc44 ]
  %l_74.0 = phi i32 [ 0, %entry ], [ %add46, %for.inc44 ]
  br i1 undef, label %for.inc44, label %bb.nph81

bb.nph81:                                         ; preds = %for.body
  %tmp98 = add i32 %p_63.addr.1, 0
  br label %for.body22

for.body22:                                       ; preds = %for.body22, %bb.nph81
  %l_75.077 = phi i64 [ %ins, %for.body22 ], [ undef, %bb.nph81 ]
  %tmp110 = trunc i64 %l_75.077 to i32
  %tmp111 = and i32 %tmp110, 65535
  %arrayidx32.0 = getelementptr [9 x [5 x [2 x %struct.S0]]]* undef, i32 0, i32 %l_74.0, i32 %tmp98, i32 %tmp111, i32 0
  store i8 1, i8* %arrayidx32.0, align 4
  %tmp106 = shl i32 %tmp110, 2
  %tmp107 = and i32 %tmp106, 262140
  %scevgep99.sum114 = or i32 %tmp107, 1
  %arrayidx32.1.1 = getelementptr [9 x [5 x [2 x %struct.S0]]]* undef, i32 0, i32 %l_74.0, i32 %tmp98, i32 0, i32 1, i32 %scevgep99.sum114
  store i8 0, i8* %arrayidx32.1.1, align 1
  %ins = or i64 undef, undef
  br label %for.body22

for.inc44:                                        ; preds = %for.body
  %add46 = add i32 %l_74.0, 1
  br label %for.body
}

; PR9028
define void @func_60(i64 %A) nounwind {
entry:
  %0 = zext i64 %A to i160
  %1 = shl i160 %0, 64
  %2 = zext i160 %1 to i576
  %3 = zext i96 undef to i576
  %4 = or i576 %3, %2
  store i576 %4, i576* undef, align 8
  ret void
}

; <rdar://problem/9187792>
define fastcc void @func_61() nounwind sspreq {
entry:
  %t1 = tail call i64 @llvm.objectsize.i64(i8* undef, i1 false)
  %t2 = icmp eq i64 %t1, -1
  br i1 %t2, label %bb2, label %bb1

bb1:
  ret void

bb2:
  ret void
}

declare i64 @llvm.objectsize.i64(i8*, i1) nounwind readnone

; PR10277
; This test has dead code elimination caused by remat during spilling.
; DCE causes a live interval to break into connected components.
; One of the components is spilled.

%t2 = type { i8 }
%t9 = type { %t10 }
%t10 = type { %t11 }
%t11 = type { %t12 }
%t12 = type { %t13*, %t13*, %t13* }
%t13 = type { %t14*, %t15, %t15 }
%t14 = type opaque
%t15 = type { i8, i32, i32 }
%t16 = type { %t17, i8* }
%t17 = type { %t18 }
%t18 = type { %t19 }
%t19 = type { %t20*, %t20*, %t20* }
%t20 = type { i32, i32 }
%t21 = type { %t13* }

define void @_ZNK4llvm17MipsFrameLowering12emitPrologueERNS_15MachineFunctionE() ssp align 2 {
bb:
  %tmp = load %t9** undef, align 4, !tbaa !0
  %tmp2 = getelementptr inbounds %t9* %tmp, i32 0, i32 0
  %tmp3 = getelementptr inbounds %t9* %tmp, i32 0, i32 0, i32 0, i32 0, i32 1
  br label %bb4

bb4:                                              ; preds = %bb37, %bb
  %tmp5 = phi i96 [ undef, %bb ], [ %tmp38, %bb37 ]
  %tmp6 = phi i96 [ undef, %bb ], [ %tmp39, %bb37 ]
  br i1 undef, label %bb34, label %bb7

bb7:                                              ; preds = %bb4
  %tmp8 = load i32* undef, align 4
  %tmp9 = and i96 %tmp6, 4294967040
  %tmp10 = zext i32 %tmp8 to i96
  %tmp11 = shl nuw nsw i96 %tmp10, 32
  %tmp12 = or i96 %tmp9, %tmp11
  %tmp13 = or i96 %tmp12, 1
  %tmp14 = load i32* undef, align 4
  %tmp15 = and i96 %tmp5, 4294967040
  %tmp16 = zext i32 %tmp14 to i96
  %tmp17 = shl nuw nsw i96 %tmp16, 32
  %tmp18 = or i96 %tmp15, %tmp17
  %tmp19 = or i96 %tmp18, 1
  %tmp20 = load i8* undef, align 1
  %tmp21 = and i8 %tmp20, 1
  %tmp22 = icmp ne i8 %tmp21, 0
  %tmp23 = select i1 %tmp22, i96 %tmp19, i96 %tmp13
  %tmp24 = select i1 %tmp22, i96 %tmp13, i96 %tmp19
  store i96 %tmp24, i96* undef, align 4
  %tmp25 = load %t13** %tmp3, align 4
  %tmp26 = icmp eq %t13* %tmp25, undef
  br i1 %tmp26, label %bb28, label %bb27

bb27:                                             ; preds = %bb7
  br label %bb29

bb28:                                             ; preds = %bb7
  call void @_ZNSt6vectorIN4llvm11MachineMoveESaIS1_EE13_M_insert_auxEN9__gnu_cxx17__normal_iteratorIPS1_S3_EERKS1_(%t10* %tmp2, %t21* byval align 4 undef, %t13* undef)
  br label %bb29

bb29:                                             ; preds = %bb28, %bb27
  store i96 %tmp23, i96* undef, align 4
  %tmp30 = load %t13** %tmp3, align 4
  br i1 false, label %bb33, label %bb31

bb31:                                             ; preds = %bb29
  %tmp32 = getelementptr inbounds %t13* %tmp30, i32 1
  store %t13* %tmp32, %t13** %tmp3, align 4
  br label %bb37

bb33:                                             ; preds = %bb29
  unreachable

bb34:                                             ; preds = %bb4
  br i1 undef, label %bb36, label %bb35

bb35:                                             ; preds = %bb34
  store %t13* null, %t13** %tmp3, align 4
  br label %bb37

bb36:                                             ; preds = %bb34
  call void @_ZNSt6vectorIN4llvm11MachineMoveESaIS1_EE13_M_insert_auxEN9__gnu_cxx17__normal_iteratorIPS1_S3_EERKS1_(%t10* %tmp2, %t21* byval align 4 undef, %t13* undef)
  br label %bb37

bb37:                                             ; preds = %bb36, %bb35, %bb31
  %tmp38 = phi i96 [ %tmp23, %bb31 ], [ %tmp5, %bb35 ], [ %tmp5, %bb36 ]
  %tmp39 = phi i96 [ %tmp24, %bb31 ], [ %tmp6, %bb35 ], [ %tmp6, %bb36 ]
  %tmp40 = add i32 undef, 1
  br label %bb4
}

declare %t14* @_ZN4llvm9MCContext16CreateTempSymbolEv(%t2*)

declare void @_ZNSt6vectorIN4llvm11MachineMoveESaIS1_EE13_M_insert_auxEN9__gnu_cxx17__normal_iteratorIPS1_S3_EERKS1_(%t10*, %t21* byval align 4, %t13*)

declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind

declare void @llvm.lifetime.end(i64, i8* nocapture) nounwind

; PR10463
; Spilling a virtual register with <undef> uses.
define void @autogen_239_1000() {
BB:
    %Shuff = shufflevector <8 x double> undef, <8 x double> undef, <8 x i32> <i32 0, i32 2, i32 4, i32 6, i32 8, i32 10, i32 undef, i32 undef>
    br label %CF

CF:
    %B16 = frem <8 x double> zeroinitializer, %Shuff
    %E19 = extractelement <8 x double> %Shuff, i32 5
    br i1 undef, label %CF, label %CF75

CF75:
    br i1 undef, label %CF75, label %CF76

CF76:
    store double %E19, double* undef
    br i1 undef, label %CF76, label %CF77

CF77:
    %B55 = fmul <8 x double> %B16, undef
    br label %CF77
}

; PR10527
define void @pr10527() nounwind uwtable {
entry:
  br label %"4"

"3":
  %0 = load <2 x i32>* null, align 8
  %1 = xor <2 x i32> zeroinitializer, %0
  %2 = and <2 x i32> %1, %6
  %3 = or <2 x i32> undef, %2
  %4 = and <2 x i32> %3, undef
  store <2 x i32> %4, <2 x i32>* undef
  %5 = load <2 x i32>* undef, align 1
  br label %"4"

"4":
  %6 = phi <2 x i32> [ %5, %"3" ], [ zeroinitializer, %entry ]
  %7 = icmp ult i32 undef, undef
  br i1 %7, label %"3", label %"5"

"5":
  ret void
}

; PR11078
;
; A virtual register used by the "foo" inline asm memory operand gets
; constrained to GR32_ABCD during coalescing.  This makes the inline asm
; impossible to allocate without splitting the live range and reinflating the
; register class around the inline asm.
;
; The constraint originally comes from the TEST8ri optimization of (icmp (and %t0, 1), 0).

@__force_order = external hidden global i32, align 4
define void @pr11078(i32* %pgd) nounwind {
entry:
  %t0 = load i32* %pgd, align 4
  %and2 = and i32 %t0, 1
  %tobool = icmp eq i32 %and2, 0
  br i1 %tobool, label %if.then, label %if.end

if.then:
  %t1 = tail call i32 asm sideeffect "bar", "=r,=*m,~{dirflag},~{fpsr},~{flags}"(i32* @__force_order) nounwind
  br label %if.end

if.end:
  %t6 = inttoptr i32 %t0 to i64*
  %t11 = tail call i64 asm sideeffect "foo", "=*m,=A,{bx},{cx},1,~{memory},~{dirflag},~{fpsr},~{flags}"(i64* %t6, i32 0, i32 0, i64 0) nounwind
  ret void
}

; Avoid emitting wrong kill flags from InstrEmitter.
; InstrEmitter::EmitSubregNode() may steal virtual registers from already
; emitted blocks when isCoalescableExtInstr points out the opportunity.
; Make sure kill flags are cleared on the newly global virtual register.
define i64 @ov_read(i8* %vf, i8* nocapture %buffer, i32 %length, i32 %bigendianp, i32 %word, i32 %sgned, i32* %bitstream) nounwind uwtable ssp {
entry:
  br i1 undef, label %return, label %while.body.preheader

while.body.preheader:                             ; preds = %entry
  br i1 undef, label %if.then3, label %if.end7

if.then3:                                         ; preds = %while.body.preheader
  %0 = load i32* undef, align 4
  br i1 undef, label %land.lhs.true.i255, label %if.end7

land.lhs.true.i255:                               ; preds = %if.then3
  br i1 undef, label %if.then.i256, label %if.end7

if.then.i256:                                     ; preds = %land.lhs.true.i255
  %sub.i = sub i32 0, %0
  %conv = sext i32 %sub.i to i64
  br i1 undef, label %if.end7, label %while.end

if.end7:                                          ; preds = %if.then.i256, %land.lhs.true.i255, %if.then3, %while.body.preheader
  unreachable

while.end:                                        ; preds = %if.then.i256
  %cmp18 = icmp sgt i32 %sub.i, 0
  %.conv = select i1 %cmp18, i64 -131, i64 %conv
  ret i64 %.conv

return:                                           ; preds = %entry
  ret i64 -131
}

; The tail call to a varargs function sets %AL.
; uitofp expands to an FCMOV instruction which splits the basic block.
; Make sure the live range of %AL isn't split.
@.str = private unnamed_addr constant { [1 x i8], [63 x i8] } zeroinitializer, align 32
define void @pr13188(i64* nocapture %this) uwtable ssp sanitize_address align 2 {
entry:
  %x7 = load i64* %this, align 8
  %sub = add i64 %x7, -1
  %conv = uitofp i64 %sub to float
  %div = fmul float %conv, 5.000000e-01
  %conv2 = fpext float %div to double
  tail call void (...)* @_Z6PrintFz(i8* getelementptr inbounds ({ [1 x i8], [63 x i8] }* @.str, i64 0, i32 0, i64 0), double %conv2)
  ret void
}
declare void @_Z6PrintFz(...)

@a = external global i32, align 4
@fn1.g = private unnamed_addr constant [9 x i32*] [i32* null, i32* @a, i32* null, i32* null, i32* null, i32* null, i32* null, i32* null, i32* null], align 16
@e = external global i32, align 4

define void @pr13943() nounwind uwtable ssp {
entry:
  %srcval = load i576* bitcast ([9 x i32*]* @fn1.g to i576*), align 16
  br label %for.cond

for.cond:                                         ; preds = %for.inc, %entry
  %g.0 = phi i576 [ %srcval, %entry ], [ %ins, %for.inc ]
  %0 = load i32* @e, align 4
  %1 = lshr i576 %g.0, 64
  %2 = trunc i576 %1 to i64
  %3 = inttoptr i64 %2 to i32*
  %cmp = icmp eq i32* undef, %3
  %conv2 = zext i1 %cmp to i32
  %and = and i32 %conv2, %0
  tail call void (...)* @fn3(i32 %and) nounwind
  %tobool = icmp eq i32 undef, 0
  br i1 %tobool, label %for.inc, label %if.then

if.then:                                          ; preds = %for.cond
  ret void

for.inc:                                          ; preds = %for.cond
  %4 = shl i576 %1, 384
  %mask = and i576 %g.0, -726838724295606890509921801691610055141362320587174446476410459910173841445449629921945328942266354949348255351381262292727973638307841
  %5 = and i576 %4, 726838724295606890509921801691610055141362320587174446476410459910173841445449629921945328942266354949348255351381262292727973638307840
  %ins = or i576 %5, %mask
  br label %for.cond
}

declare void @fn3(...)

; Check coalescing of IMPLICIT_DEF instructions:
;
; %vreg1 = IMPLICIT_DEF
; %vreg2 = MOV32r0
;
; When coalescing %vreg1 and %vreg2, the IMPLICIT_DEF instruction should be
; erased along with its value number.
;
define void @rdar12474033() nounwind ssp {
bb:
  br i1 undef, label %bb21, label %bb1

bb1:                                              ; preds = %bb
  switch i32 undef, label %bb10 [
    i32 4, label %bb2
    i32 1, label %bb9
    i32 5, label %bb3
    i32 6, label %bb3
    i32 2, label %bb9
  ]

bb2:                                              ; preds = %bb1
  unreachable

bb3:                                              ; preds = %bb1, %bb1
  br i1 undef, label %bb4, label %bb5

bb4:                                              ; preds = %bb3
  unreachable

bb5:                                              ; preds = %bb3
  %tmp = load <4 x float>* undef, align 1
  %tmp6 = bitcast <4 x float> %tmp to i128
  %tmp7 = load <4 x float>* undef, align 1
  %tmp8 = bitcast <4 x float> %tmp7 to i128
  br label %bb10

bb9:                                              ; preds = %bb1, %bb1
  unreachable

bb10:                                             ; preds = %bb5, %bb1
  %tmp11 = phi i128 [ undef, %bb1 ], [ %tmp6, %bb5 ]
  %tmp12 = phi i128 [ 0, %bb1 ], [ %tmp8, %bb5 ]
  switch i32 undef, label %bb21 [
    i32 2, label %bb18
    i32 3, label %bb13
    i32 5, label %bb16
    i32 6, label %bb17
    i32 1, label %bb18
  ]

bb13:                                             ; preds = %bb10
  br i1 undef, label %bb15, label %bb14

bb14:                                             ; preds = %bb13
  br label %bb21

bb15:                                             ; preds = %bb13
  unreachable

bb16:                                             ; preds = %bb10
  unreachable

bb17:                                             ; preds = %bb10
  unreachable

bb18:                                             ; preds = %bb10, %bb10
  %tmp19 = bitcast i128 %tmp11 to <4 x float>
  %tmp20 = bitcast i128 %tmp12 to <4 x float>
  br label %bb21

bb21:                                             ; preds = %bb18, %bb14, %bb10, %bb
  %tmp22 = phi <4 x float> [ undef, %bb ], [ undef, %bb10 ], [ undef, %bb14 ], [ %tmp20, %bb18 ]
  %tmp23 = phi <4 x float> [ undef, %bb ], [ undef, %bb10 ], [ undef, %bb14 ], [ %tmp19, %bb18 ]
  store <4 x float> %tmp23, <4 x float>* undef, align 16
  store <4 x float> %tmp22, <4 x float>* undef, align 16
  switch i32 undef, label %bb29 [
    i32 5, label %bb27
    i32 1, label %bb24
    i32 2, label %bb25
    i32 14, label %bb28
    i32 4, label %bb26
  ]

bb24:                                             ; preds = %bb21
  unreachable

bb25:                                             ; preds = %bb21
  br label %bb29

bb26:                                             ; preds = %bb21
  br label %bb29

bb27:                                             ; preds = %bb21
  unreachable

bb28:                                             ; preds = %bb21
  br label %bb29

bb29:                                             ; preds = %bb28, %bb26, %bb25, %bb21
  unreachable
}

define void @pr14194() nounwind uwtable {
  %tmp = load i64* undef, align 16
  %tmp1 = trunc i64 %tmp to i32
  %tmp2 = lshr i64 %tmp, 32
  %tmp3 = trunc i64 %tmp2 to i32
  %tmp4 = call { i32, i32 } asm sideeffect "", "=&r,=&r,r,r,0,1,~{dirflag},~{fpsr},~{flags}"(i32 %tmp3, i32 undef, i32 %tmp3, i32 %tmp1) nounwind
 ret void
}