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239 lines
10 KiB
239 lines
10 KiB
4 months ago
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# RUN: llc -O1 -start-after=livedebugvalues -o - %s | FileCheck %s
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# Reproducer based on the following C file:
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#
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# int global1, global2, global3;
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#
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# extern void ext1(int);
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# extern void ext2(int, int);
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# extern void ext3(int, int, int);
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#
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# int test1() {
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# int local[3] = {global1, 123, 456};
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# ext2(local[0], local[1]);
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# return local[1];
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# }
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#
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# int test2() {
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# int local[3] = {global1, global2, global3};
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# ext3(local[0], local[1], local[2]);
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# return local[0];
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# }
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#
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# Compiled using -O1 -g.
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--- |
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@global1 = common global i32 0, align 4
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@global2 = common global i32 0, align 4
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@global3 = common global i32 0, align 4
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; Function Attrs: nounwind uwtable
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define i32 @test1() #0 !dbg !8 {
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entry:
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%0 = load i32, i32* @global1, align 4, !dbg !16
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call void @llvm.dbg.value(metadata i32 %0, metadata !12, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 32)), !dbg !16
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call void @llvm.dbg.value(metadata i32 123, metadata !12, metadata !DIExpression(DW_OP_LLVM_fragment, 32, 32)), !dbg !16
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call void @llvm.dbg.value(metadata i32 456, metadata !12, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 32)), !dbg !16
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tail call void @ext2(i32 %0, i32 123), !dbg !16
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ret i32 123, !dbg !17
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}
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declare void @ext2(i32, i32)
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; Function Attrs: nounwind uwtable
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define i32 @test2() #0 !dbg !18 {
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entry:
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%0 = load i32, i32* @global1, align 4, !dbg !20
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call void @llvm.dbg.value(metadata i32 %0, metadata !19, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 32)), !dbg !20
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%1 = load i32, i32* @global2, align 4, !dbg !20
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call void @llvm.dbg.value(metadata i32 %1, metadata !19, metadata !DIExpression(DW_OP_LLVM_fragment, 32, 32)), !dbg !20
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%2 = load i32, i32* @global3, align 4, !dbg !20
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call void @llvm.dbg.value(metadata i32 %2, metadata !19, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 32)), !dbg !20
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tail call void @ext3(i32 %0, i32 %1, i32 %2) #3, !dbg !20
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ret i32 %0, !dbg !21
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}
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declare void @ext3(i32, i32, i32)
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { nounwind uwtable }
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attributes #1 = { nounwind readnone speculatable }
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!llvm.dbg.cu = !{!1}
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!llvm.module.flags = !{!5, !6}
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!llvm.ident = !{!7}
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!1 = distinct !DICompileUnit(language: DW_LANG_C99, file: !2, producer: "clang version 9.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !3, globals: !3, nameTableKind: None)
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!2 = !DIFile(filename: "foo.c", directory: "/")
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!3 = !{}
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!4 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!5 = !{i32 2, !"Dwarf Version", i32 4}
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!6 = !{i32 2, !"Debug Info Version", i32 3}
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!7 = !{!"clang version 9.0.0"}
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!8 = distinct !DISubprogram(name: "test1", scope: !2, file: !2, line: 7, type: !9, scopeLine: 7, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !1, retainedNodes: !11)
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!9 = !DISubroutineType(types: !10)
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!10 = !{!4}
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!11 = !{!12}
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!12 = !DILocalVariable(name: "local", scope: !8, file: !2, line: 8, type: !13)
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!13 = !DICompositeType(tag: DW_TAG_array_type, baseType: !4, size: 96, elements: !14)
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!14 = !{!15}
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!15 = !DISubrange(count: 3)
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!16 = !DILocation(line: 8, scope: !8)
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!17 = !DILocation(line: 9, scope: !8)
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!18 = distinct !DISubprogram(name: "test2", scope: !2, file: !2, line: 7, type: !9, scopeLine: 7, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !1, retainedNodes: !11)
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!19 = !DILocalVariable(name: "local", scope: !18, file: !2, line: 8, type: !13)
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!20 = !DILocation(line: 15, scope: !18)
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!21 = !DILocation(line: 16, scope: !18)
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...
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---
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name: test1
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
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renamable $edi = MOV32rm $rip, 1, $noreg, @global1, $noreg, debug-location !16 :: (dereferenceable load 4 from @global1)
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DBG_VALUE 456, $noreg, !12, !DIExpression(DW_OP_LLVM_fragment, 64, 32), debug-location !16
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DBG_VALUE 123, $noreg, !12, !DIExpression(DW_OP_LLVM_fragment, 32, 32), debug-location !16
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DBG_VALUE $edi, $noreg, !12, !DIExpression(DW_OP_LLVM_fragment, 0, 32), debug-location !16
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$esi = MOV32ri 123, debug-location !16
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CALL64pcrel32 @ext2, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit killed $esi, implicit-def $rsp, implicit-def $ssp, debug-location !16
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$eax = MOV32ri 123, debug-location !17
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$rcx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !17
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RETQ killed $eax, debug-location !17
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...
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# CHECK: .Ltmp1
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# CHECK-NEXT: #DEBUG_VALUE: test1:local <- [DW_OP_LLVM_fragment 64 32] 456
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# CHECK-NEXT: #DEBUG_VALUE: test1:local <- [DW_OP_LLVM_fragment 32 32] 123
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# CHECK-NEXT: #DEBUG_VALUE: test1:local <- [DW_OP_LLVM_fragment 0 32] $edi
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# CHECK: callq ext2
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# CHECK-NEXT: .Ltmp2:
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...
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---
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name: test2
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $rbx
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frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp, debug-location !20
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renamable $ebx = MOV32rm $rip, 1, $noreg, @global1, $noreg, debug-location !20 :: (dereferenceable load 4 from @global1)
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DBG_VALUE $ebx, $noreg, !19, !DIExpression(DW_OP_LLVM_fragment, 0, 32), debug-location !20
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renamable $esi = MOV32rm $rip, 1, $noreg, @global2, $noreg, debug-location !20 :: (dereferenceable load 4 from @global2)
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DBG_VALUE $esi, $noreg, !19, !DIExpression(DW_OP_LLVM_fragment, 32, 32), debug-location !20
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renamable $edx = MOV32rm $rip, 1, $noreg, @global3, $noreg, debug-location !20 :: (dereferenceable load 4 from @global3)
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DBG_VALUE $edx, $noreg, !19, !DIExpression(DW_OP_LLVM_fragment, 64, 32), debug-location !20
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$edi = MOV32rr $ebx, debug-location !20
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CALL64pcrel32 @ext3, csr_64, implicit $rsp, implicit $ssp, implicit killed $edi, implicit $esi, implicit $edx, implicit-def $rsp, implicit-def $ssp, debug-location !20
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$eax = MOV32rr killed $ebx, debug-location !20
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$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !20
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RETQ killed $eax, debug-location !21
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...
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# CHECK: .Ltmp4:
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# CHECK-NEXT: #DEBUG_VALUE: test2:local <- [DW_OP_LLVM_fragment 0 32] $ebx
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# CHECK: .Ltmp5:
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# CHECK-NEXT: #DEBUG_VALUE: test2:local <- [DW_OP_LLVM_fragment 32 32] $esi
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# CHECK: .Ltmp6:
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# CHECK-NEXT: #DEBUG_VALUE: test2:local <- [DW_OP_LLVM_fragment 64 32] $edx
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# CHECK: callq ext3
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# CHECK-NEXT: .Ltmp7:
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# CHECK: popq %rbx
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# CHECK-NEXT: .Ltmp8:
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#### Location list for test1:local.
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# Verify that a location list entry, which does not contain the fragment that
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# is described by the clobbered $edi, is emitted directly after the call to
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# ext2().
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# CHECK: .Ldebug_loc0:
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# CHECK-NEXT: .quad .Ltmp1-.Lfunc_begin0
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# CHECK-NEXT: .quad .Ltmp2-.Lfunc_begin0
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# CHECK-NEXT: .short 14 # Loc expr size
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# CHECK-NEXT: .byte 85 # super-register DW_OP_reg5
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# CHECK-NEXT: .byte 147 # DW_OP_piece
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# CHECK-NEXT: .byte 4 # 4
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# CHECK-NEXT: .byte 16 # DW_OP_constu
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# CHECK-NEXT: .byte 123 # 123
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# CHECK-NEXT: .byte 159 # DW_OP_stack_value
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# CHECK-NEXT: .byte 147 # DW_OP_piece
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# CHECK-NEXT: .byte 4 # 4
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# CHECK-NEXT: .byte 16 # DW_OP_constu
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# CHECK-NEXT: .byte 200 # 456
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# CHECK-NEXT: .byte 3 #
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# CHECK-NEXT: .byte 159 # DW_OP_stack_value
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# CHECK-NEXT: .byte 147 # DW_OP_piece
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# CHECK-NEXT: .byte 4 # 4
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# CHECK-NEXT: .quad .Ltmp2-.Lfunc_begin0
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# CHECK-NEXT: .quad .Lfunc_end0-.Lfunc_begin0
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# CHECK-NEXT: .short 13 # Loc expr size
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# CHECK-NEXT: .byte 147 # DW_OP_piece
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# CHECK-NEXT: .byte 4 # 4
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# CHECK-NEXT: .byte 16 # DW_OP_constu
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# CHECK-NEXT: .byte 123 # 123
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# CHECK-NEXT: .byte 159 # DW_OP_stack_value
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# CHECK-NEXT: .byte 147 # DW_OP_piece
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# CHECK-NEXT: .byte 4 # 4
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# CHECK-NEXT: .byte 16 # DW_OP_constu
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# CHECK-NEXT: .byte 200 # 456
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# CHECK-NEXT: .byte 3 #
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# CHECK-NEXT: .byte 159 # DW_OP_stack_value
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# CHECK-NEXT: .byte 147 # DW_OP_piece
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# CHECK-NEXT: .byte 4 # 4
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# CHECK-NEXT: .quad 0
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# CHECK-NEXT: .quad 0
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#### Location list for test2:local.
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# Verify that the debug values that are described by $edi and $edx are
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# considered clobbered by the call to ext3(), leaving a location list entry
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# after the call where the first 32 bits are still described by $ebx.
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# That location list entry is valid until the restore of the register.
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# CHECK: .Ldebug_loc1:
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# CHECK-NEXT: .quad .Ltmp4-.Lfunc_begin0
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# CHECK-NEXT: .quad .Ltmp5-.Lfunc_begin0
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# CHECK-NEXT: .short 3 # Loc expr size
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# CHECK-NEXT: .byte 83 # super-register DW_OP_reg3
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# CHECK-NEXT: .byte 147 # DW_OP_piece
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# CHECK-NEXT: .byte 4 # 4
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# CHECK-NEXT: .quad .Ltmp5-.Lfunc_begin0
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# CHECK-NEXT: .quad .Ltmp6-.Lfunc_begin0
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# CHECK-NEXT: .short 6 # Loc expr size
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# CHECK-NEXT: .byte 83 # super-register DW_OP_reg3
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# CHECK-NEXT: .byte 147 # DW_OP_piece
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# CHECK-NEXT: .byte 4 # 4
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# CHECK-NEXT: .byte 84 # super-register DW_OP_reg4
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# CHECK-NEXT: .byte 147 # DW_OP_piece
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# CHECK-NEXT: .byte 4 # 4
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# CHECK-NEXT: .quad .Ltmp6-.Lfunc_begin0
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# CHECK-NEXT: .quad .Ltmp7-.Lfunc_begin0
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# CHECK-NEXT: .short 9 # Loc expr size
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# CHECK-NEXT: .byte 83 # super-register DW_OP_reg3
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# CHECK-NEXT: .byte 147 # DW_OP_piece
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# CHECK-NEXT: .byte 4 # 4
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# CHECK-NEXT: .byte 84 # super-register DW_OP_reg4
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# CHECK-NEXT: .byte 147 # DW_OP_piece
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# CHECK-NEXT: .byte 4 # 4
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# CHECK-NEXT: .byte 81 # super-register DW_OP_reg1
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# CHECK-NEXT: .byte 147 # DW_OP_piece
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# CHECK-NEXT: .byte 4 # 4
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# CHECK-NEXT: .quad .Ltmp7-.Lfunc_begin0
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# CHECK-NEXT: .quad .Ltmp8-.Lfunc_begin0
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# CHECK-NEXT: .short 3 # Loc expr size
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# CHECK-NEXT: .byte 83 # super-register DW_OP_reg3
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# CHECK-NEXT: .byte 147 # DW_OP_piece
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# CHECK-NEXT: .byte 4 # 4
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# CHECK-NEXT: .quad 0
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# CHECK-NEXT: .quad 0
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