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; RUN: llc -mtriple=x86_64-windows-msvc < %s | FileCheck %s --check-prefix=ASM
; RUN: llc -mtriple=x86_64-windows-msvc < %s -filetype=obj | llvm-readobj -codeview - | FileCheck %s --check-prefix=OBJ
; This test attempts to exercise gaps in local variables. The local variable 'p'
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; will end up in some CSR (esi), which will be used in both the BB scheduled
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; discontiguously out of line and the normal return BB. The best way to encode
; this is to use a LocalVariableAddrGap. If the gap is too large, multiple
; ranges should be emitted.
; Source to regenerate:
; int barrier();
; int vardef();
; void use(int);
; void __declspec(noreturn) call_noreturn(int);
; int f() {
; if (barrier()) {
; int p = vardef();
; if (barrier()) // Unlikely, will be placed after return
; call_noreturn(p);
; use(p);
; } else {
; barrier();
; }
; return 0;
; }
; ASM: f: # @f
; ASM: pushq %rsi
; ASM: subq $32, %rsp
; ASM: callq barrier
; ASM: testl %eax, %eax
; ASM: je .LBB0_3
; ASM: callq vardef
; ASM: movl %eax, %esi
; ASM: [[p_b1:\.Ltmp[0-9]+]]:
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; ASM: #DEBUG_VALUE: p <- $esi
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; ASM: callq barrier
; ASM: movl %esi, %ecx
; ASM: testl %eax, %eax
; ASM: jne .LBB0_5
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; ASM: # %bb.2: # %if.end
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; ASM: #DEBUG_VALUE: p <- $esi
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; ASM: callq use
; ASM: jmp .LBB0_4
; ASM: [[p_e1:\.Ltmp[0-9]+]]:
; ASM: .LBB0_3: # %if.else
; ASM: callq barrier
; ASM: .LBB0_4: # %if.end6
; ASM: xorl %eax, %eax
; ASM: addq $32, %rsp
; ASM: popq %rsi
; ASM: retq
; ASM: .LBB0_5: # %if.then4
; ASM: [[p_b2:\.Ltmp[0-9]+]]:
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; ASM: #DEBUG_VALUE: p <- $esi
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; ASM: callq call_noreturn
; ASM: ud2
; ASM: .Lfunc_end0:
; ASM: .short {{.*}} # Record length
; ASM: .short 4414 # Record kind: S_LOCAL
; ASM: .long 116 # TypeIndex
; ASM: .short 0 # Flags
; ASM: .asciz "p"
; ASM: .cv_def_range [[p_b1]] [[p_e1]] [[p_b2]] .Lfunc_end0, "A\021\027\000\000\000"
; ASM: .short 2 # Record length
; ASM: .short 4431 # Record kind: S_PROC_ID_END
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; OBJ: LocalSym {
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; OBJ: Type: int (0x74)
; OBJ: VarName: p
; OBJ: }
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; OBJ-NOT: LocalSym {
; OBJ: DefRangeRegisterSym {
; OBJ-NEXT: Kind:
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; OBJ-NEXT: Register: ESI (0x17)
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; OBJ-NEXT: MayHaveNoName: 0
; OBJ-NEXT: LocalVariableAddrRange {
; OBJ-NEXT: OffsetStart: .text+0x{{.*}}
; OBJ-NEXT: ISectStart: 0x0
; OBJ-NEXT: Range: 0x{{.*}}
; OBJ-NEXT: }
; OBJ-NEXT: LocalVariableAddrGap [
; OBJ-NEXT: GapStartOffset: 0x{{.*}}
; OBJ-NEXT: Range: 0x{{.*}}
; OBJ-NEXT: ]
; OBJ-NEXT: }
; ModuleID = 't.cpp'
source_filename = "t.cpp"
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc19.0.24210"
; Function Attrs: nounwind uwtable
define i32 @f ( ) local_unnamed_addr #0 !dbg !7 {
entry:
%call = tail call i32 bitcast ( i32 ( . . . ) * @barrier to i32 ( ) * ) ( ) #4 , !dbg !15
%tobool = icmp eq i32 %call , 0 , !dbg !15
br i1 %tobool , label %if.else , label %if.then , !dbg !16
if.then: ; preds = %entry
%call1 = tail call i32 bitcast ( i32 ( . . . ) * @vardef to i32 ( ) * ) ( ) #4 , !dbg !17
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tail call void @llvm.dbg.value ( metadata i32 %call1 , metadata !12 , metadata !18 ) , !dbg !19
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%call2 = tail call i32 bitcast ( i32 ( . . . ) * @barrier to i32 ( ) * ) ( ) #4 , !dbg !20
%tobool3 = icmp eq i32 %call2 , 0 , !dbg !20
br i1 %tobool3 , label %if.end , label %if.then4 , !dbg !22
if.then4: ; preds = %if.then
tail call void @call_noreturn ( i32 %call1 ) #5 , !dbg !23
unreachable , !dbg !23
if.end: ; preds = %if.then
tail call void @use ( i32 %call1 ) #4 , !dbg !24
br label %if.end6 , !dbg !25
if.else: ; preds = %entry
%call5 = tail call i32 bitcast ( i32 ( . . . ) * @barrier to i32 ( ) * ) ( ) #4 , !dbg !26
br label %if.end6
if.end6: ; preds = %if.else, %if.end
ret i32 0 , !dbg !28
}
declare i32 @barrier ( . . . ) local_unnamed_addr #1
declare i32 @vardef ( . . . ) local_unnamed_addr #1
; Function Attrs: noreturn
declare void @call_noreturn ( i32 ) local_unnamed_addr #2
declare void @use ( i32 ) local_unnamed_addr #1
; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value ( metadata , metadata , metadata ) #3
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attributes #0 = { nounwind uwtable "correctly-rounded-divide-sqrt-fp-math" = "false" "disable-tail-calls" = "false" "less-precise-fpmad" = "false" "no-frame-pointer-elim" = "false" "no-infs-fp-math" = "false" "no-jump-tables" = "false" "no-nans-fp-math" = "false" "no-signed-zeros-fp-math" = "false" "no-trapping-math" = "false" "stack-protector-buffer-size" = "8" "target-cpu" = "x86-64" "target-features" = "+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math" = "false" "use-soft-float" = "false" }
attributes #1 = { "correctly-rounded-divide-sqrt-fp-math" = "false" "disable-tail-calls" = "false" "less-precise-fpmad" = "false" "no-frame-pointer-elim" = "false" "no-infs-fp-math" = "false" "no-nans-fp-math" = "false" "no-signed-zeros-fp-math" = "false" "no-trapping-math" = "false" "stack-protector-buffer-size" = "8" "target-cpu" = "x86-64" "target-features" = "+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math" = "false" "use-soft-float" = "false" }
attributes #2 = { noreturn "correctly-rounded-divide-sqrt-fp-math" = "false" "disable-tail-calls" = "false" "less-precise-fpmad" = "false" "no-frame-pointer-elim" = "false" "no-infs-fp-math" = "false" "no-nans-fp-math" = "false" "no-signed-zeros-fp-math" = "false" "no-trapping-math" = "false" "stack-protector-buffer-size" = "8" "target-cpu" = "x86-64" "target-features" = "+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math" = "false" "use-soft-float" = "false" }
attributes #3 = { nounwind readnone }
attributes #4 = { nounwind }
attributes #5 = { noreturn nounwind }
!llvm.dbg.cu = ! { !0 }
!llvm.module.flags = ! { !3 , !4 , !5 }
!llvm.ident = ! { !6 }
!0 = distinct !DICompileUnit ( language: D W _ L A N G _ C 99 , file: !1 , producer: "clang version 4.0.0 " , isOptimized: true , runtimeVersion: 0 , emissionKind: F u l l D e b u g , enums: !2 )
!1 = !DIFile ( filename: "t.cpp" , directory: "C:\5Csrc\5Cllvm\5Cbuild" )
!2 = ! { }
!3 = ! { i32 2 , !"CodeView" , i32 1 }
!4 = ! { i32 2 , !"Debug Info Version" , i32 3 }
!5 = ! { i32 1 , !"PIC Level" , i32 2 }
!6 = ! { !"clang version 4.0.0 " }
!7 = distinct !DISubprogram ( name: "f" , scope: !1 , file: !1 , line: 19 , type: !8 , isLocal: false , isDefinition: true , scopeLine: 19 , isOptimized: true , unit: !0 , variables: !11 )
!8 = !DISubroutineType ( types: !9 )
!9 = ! { !10 }
!10 = !DIBasicType ( name: "int" , size: 32 , align: 32 , encoding: D W _ A T E _ s i g n e d )
!11 = ! { !12 }
!12 = !DILocalVariable ( name: "p" , scope: !13 , file: !1 , line: 21 , type: !10 )
!13 = distinct !DILexicalBlock ( scope: !14 , file: !1 , line: 20 , column: 18 )
!14 = distinct !DILexicalBlock ( scope: !7 , file: !1 , line: 20 , column: 7 )
!15 = !DILocation ( line: 20 , column: 7 , scope: !14 )
!16 = !DILocation ( line: 20 , column: 7 , scope: !7 )
!17 = !DILocation ( line: 21 , column: 13 , scope: !13 )
!18 = !DIExpression ( )
!19 = !DILocation ( line: 21 , column: 9 , scope: !13 )
!20 = !DILocation ( line: 22 , column: 9 , scope: !21 )
!21 = distinct !DILexicalBlock ( scope: !13 , file: !1 , line: 22 , column: 9 )
!22 = !DILocation ( line: 22 , column: 9 , scope: !13 )
!23 = !DILocation ( line: 23 , column: 7 , scope: !21 )
!24 = !DILocation ( line: 24 , column: 5 , scope: !13 )
!25 = !DILocation ( line: 25 , column: 3 , scope: !13 )
!26 = !DILocation ( line: 26 , column: 5 , scope: !27 )
!27 = distinct !DILexicalBlock ( scope: !14 , file: !1 , line: 25 , column: 10 )
!28 = !DILocation ( line: 28 , column: 3 , scope: !7 )