176 lines
7.8 KiB
LLVM
176 lines
7.8 KiB
LLVM
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; RUN: llc -mtriple=x86_64-windows-msvc < %s | FileCheck %s --check-prefix=ASM
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; RUN: llc -mtriple=x86_64-windows-msvc < %s -filetype=obj | llvm-readobj --codeview - | FileCheck %s --check-prefix=OBJ
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; 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
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; this is to use a LocalVariableAddrGap. If the gap is too large, multiple
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; ranges should be emitted.
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; Source to regenerate:
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; int barrier();
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; int vardef();
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; void use(int);
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; void __declspec(noreturn) call_noreturn(int);
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; int f() {
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; if (barrier()) {
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; int p = vardef();
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; if (barrier()) // Unlikely, will be placed after return
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; call_noreturn(p);
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; use(p);
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; } else {
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; barrier();
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; }
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; return 0;
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; }
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; ASM: f: # @f
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; ASM: pushq %rsi
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; ASM: subq $32, %rsp
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; ASM: callq barrier
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; ASM: testl %eax, %eax
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; ASM: je .LBB0_3
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; ASM: callq vardef
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; ASM: movl %eax, %esi
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; ASM: [[p_b1:\.Ltmp[0-9]+]]:
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; ASM: #DEBUG_VALUE: p <- $esi
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; ASM: callq barrier
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; ASM: movl %esi, %ecx
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; ASM: testl %eax, %eax
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; 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
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; ASM: jmp .LBB0_4
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; ASM: [[p_e1:\.Ltmp[0-9]+]]:
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; ASM: .LBB0_3: # %if.else
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; ASM: callq barrier
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; ASM: .LBB0_4: # %if.end6
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; ASM: xorl %eax, %eax
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; ASM: addq $32, %rsp
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; ASM: popq %rsi
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; ASM: retq
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; ASM: .LBB0_5: # %if.then4
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; ASM: [[p_b2:\.Ltmp[0-9]+]]:
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; ASM: #DEBUG_VALUE: p <- $esi
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; ASM: callq call_noreturn
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; ASM: int3
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; ASM: .Lfunc_end0:
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; ASM: .short {{.*}} # Record length
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; ASM: .short 4414 # Record kind: S_LOCAL
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; ASM: .long 116 # TypeIndex
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; ASM: .short 0 # Flags
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; ASM: .asciz "p"
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; ASM: .cv_def_range [[p_b1]] [[p_e1]] [[p_b2]] .Lfunc_end0, reg, 23
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; ASM: .short 2 # Record length
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; ASM: .short 4431 # Record kind: S_PROC_ID_END
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; OBJ: LocalSym {
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; OBJ: Type: int (0x74)
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; OBJ: VarName: p
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; OBJ: }
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; OBJ-NOT: LocalSym {
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; OBJ: DefRangeRegisterSym {
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; OBJ-NEXT: Kind:
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; OBJ-NEXT: Register: ESI (0x17)
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; OBJ-NEXT: MayHaveNoName: 0
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; OBJ-NEXT: LocalVariableAddrRange {
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; OBJ-NEXT: OffsetStart: .text+0x{{.*}}
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; OBJ-NEXT: ISectStart: 0x0
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; OBJ-NEXT: Range: 0x{{.*}}
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; OBJ-NEXT: }
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; OBJ-NEXT: LocalVariableAddrGap [
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; OBJ-NEXT: GapStartOffset: 0x{{.*}}
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; OBJ-NEXT: Range: 0x{{.*}}
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; OBJ-NEXT: ]
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; OBJ-NEXT: }
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; ModuleID = 't.cpp'
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source_filename = "t.cpp"
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc19.0.24210"
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; Function Attrs: nounwind uwtable
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define i32 @f() local_unnamed_addr #0 !dbg !7 {
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entry:
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%call = tail call i32 bitcast (i32 (...)* @barrier to i32 ()*)() #4, !dbg !15
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%tobool = icmp eq i32 %call, 0, !dbg !15
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br i1 %tobool, label %if.else, label %if.then, !dbg !16
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if.then: ; preds = %entry
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%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
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%tobool3 = icmp eq i32 %call2, 0, !dbg !20
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br i1 %tobool3, label %if.end, label %if.then4, !dbg !22
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if.then4: ; preds = %if.then
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tail call void @call_noreturn(i32 %call1) #5, !dbg !23
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unreachable, !dbg !23
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if.end: ; preds = %if.then
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tail call void @use(i32 %call1) #4, !dbg !24
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br label %if.end6, !dbg !25
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if.else: ; preds = %entry
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%call5 = tail call i32 bitcast (i32 (...)* @barrier to i32 ()*)() #4, !dbg !26
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br label %if.end6
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if.end6: ; preds = %if.else, %if.end
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ret i32 0, !dbg !28
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}
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declare i32 @barrier(...) local_unnamed_addr #1
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declare i32 @vardef(...) local_unnamed_addr #1
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; Function Attrs: noreturn
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declare void @call_noreturn(i32) local_unnamed_addr #2
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declare void @use(i32) local_unnamed_addr #1
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; 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" "frame-pointer"="none" "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" }
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attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "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" }
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attributes #2 = { noreturn "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "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" }
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attributes #3 = { nounwind readnone }
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attributes #4 = { nounwind }
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attributes #5 = { noreturn nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "t.cpp", directory: "C:\5Csrc\5Cllvm\5Cbuild")
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!2 = !{}
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!3 = !{i32 2, !"CodeView", i32 1}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"PIC Level", i32 2}
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!6 = !{!"clang version 4.0.0 "}
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!7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 19, type: !8, isLocal: false, isDefinition: true, scopeLine: 19, isOptimized: true, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10}
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!10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!11 = !{!12}
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!12 = !DILocalVariable(name: "p", scope: !13, file: !1, line: 21, type: !10)
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!13 = distinct !DILexicalBlock(scope: !14, file: !1, line: 20, column: 18)
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!14 = distinct !DILexicalBlock(scope: !7, file: !1, line: 20, column: 7)
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!15 = !DILocation(line: 20, column: 7, scope: !14)
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!16 = !DILocation(line: 20, column: 7, scope: !7)
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!17 = !DILocation(line: 21, column: 13, scope: !13)
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!18 = !DIExpression()
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!19 = !DILocation(line: 21, column: 9, scope: !13)
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!20 = !DILocation(line: 22, column: 9, scope: !21)
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!21 = distinct !DILexicalBlock(scope: !13, file: !1, line: 22, column: 9)
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!22 = !DILocation(line: 22, column: 9, scope: !13)
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!23 = !DILocation(line: 23, column: 7, scope: !21)
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!24 = !DILocation(line: 24, column: 5, scope: !13)
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!25 = !DILocation(line: 25, column: 3, scope: !13)
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!26 = !DILocation(line: 26, column: 5, scope: !27)
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!27 = distinct !DILexicalBlock(scope: !14, file: !1, line: 25, column: 10)
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!28 = !DILocation(line: 28, column: 3, scope: !7)
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