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260 lines
8.0 KiB
260 lines
8.0 KiB
4 months ago
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# RUN: llc %s -o - -run-pass=livedebugvalues | FileCheck %s
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#
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# The first func tests that, for two independent variable fragments defined in
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# blocks 1 and 2, _both_ their locations are propagated into the exit block.
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# LiveDebugValues previously ignored fragments and only propagated the last
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# variable location seen.
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#
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# The second func tests that overlapping variable fragments are handled
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# correctly -- that the redefinition of a particular fragment also clobbers
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# any overlaps. The dbg value of $cx in block one should not be propagated to
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# block two, because an overlapping dbg value inst has been encountered.
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#
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# The third function checks that DBG_VALUEs without fragments are seen as
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# overlapping any DBG_VALUE with a fragment.
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#
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# CHECK-LABEL: foo
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# CHECK-LABEL: bb.3.bb3:
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# CHECK: DBG_VALUE $ebx, $noreg, !{{[0-9]+}},
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# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 32, 32)
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# CHECK-NEXT: DBG_VALUE $eax, $noreg, !{{[0-9]+}},
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# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 0, 32)
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# CHECK-NEXT: XOR32rr
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# CHECK-NEXT: RETQ
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#
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# CHECK-LABEL: bar
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# CHECK-LABEL: bb.0.entry:
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# CHECK: DBG_VALUE $cx, $noreg, !{{[0-9]+}},
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# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 0, 16)
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# CHECK-LABEL: bb.1.bb1:
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# CHECK: DBG_VALUE $cx, $noreg, !{{[0-9]+}},
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# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 0, 16)
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# CHECK-NEXT: MOV32rr
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# CHECK-NEXT: DBG_VALUE $ax, $noreg, !{{[0-9]+}},
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# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 8, 16)
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# CHECK-NEXT: JMP_1
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# CHECK-LABEL: bb.2.bb2:
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# CHECK-NOT: DBG_VALUE
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# CHECK: DBG_VALUE $ax, $noreg, !{{[0-9]+}},
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# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 8, 16)
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# CHECK-NEXT: MOV32rr
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# CHECK-NEXT: ADD32ri8
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# CHECK-NEXT: DBG_VALUE $ebx, $noreg, !{{[0-9]+}},
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# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 32, 32)
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# CHECK-NEXT: JMP_1
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# CHECK-LABEL: bb.3.bb3:
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# CHECK: DBG_VALUE $ebx, $noreg, !{{[0-9]+}},
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# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 32, 32)
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# CHECK-NEXT: DBG_VALUE $ax, $noreg, !{{[0-9]+}},
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# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 8, 16)
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# CHECK-NEXT: XOR32rr
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# CHECK-NEXT: RETQ
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# CHECK-LABEL: baz
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# CHECK-LABEL: bb.0.entry:
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# CHECK: DBG_VALUE $cx, $noreg, !{{[0-9]+}},
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# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 0, 16)
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# CHECK-NEXT: JMP_1 %bb.1
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#
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# CHECK-LABEL: bb.1.bb1:
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# CHECK: DBG_VALUE $cx, $noreg, !{{[0-9]+}},
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# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 0, 16)
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# CHECK-NEXT: MOV32rr
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# CHECK-NEXT: DBG_VALUE $rdi, $noreg, !{{[0-9]+}}, !DIExpression()
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# CHECK-NEXT: JMP_1 %bb.2
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#
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# CHECK-LABEL: bb.2.bb2:
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# CHECK-NOT: DBG_VALUE $cx
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# CHECK: DBG_VALUE $rdi, $noreg, !{{[0-9]+}}, !DIExpression()
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# CHECK-NEXT: MOV32rr
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# CHECK-NEXT: ADD32ri8
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# CHECK-NEXT: DBG_VALUE $ebx, $noreg, !{{[0-9]+}},
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# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 32, 32)
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# CHECK-NEXT: JMP_1 %bb.3
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#
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# CHECK-LABEL: bb.3.bb3:
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# CHECK-NOT: DBG_VALUE $rdi
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# CHECK-NOT: DBG_VALUE $cx
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# CHECK: DBG_VALUE $ebx, $noreg, !{{[0-9]+}},
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# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 32, 32)
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# CHECK-NEXT: XOR32rr
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# CHECK-NEXT: RETQ
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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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define i32 @foo(i32* %bees, i32* %output) !dbg !4 {
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entry:
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br label %bb1
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bb1:
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br label %bb2
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bb2:
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br label %bb3
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bb3:
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ret i32 0
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}
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define i32 @bar(i32* %bees, i32* %output) !dbg !40 {
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entry:
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br label %bb1
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bb1:
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br label %bb2
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bb2:
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br label %bb3
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bb3:
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ret i32 0
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}
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define i32 @baz(i32* %bees, i32* %output) !dbg !80 {
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entry:
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br label %bb1
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bb1:
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br label %bb2
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bb2:
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br label %bb3
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bb3:
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ret i32 0
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}
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!llvm.module.flags = !{!0, !100}
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!llvm.dbg.cu = !{!1}
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!100 = !{i32 2, !"Dwarf Version", i32 4}
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!0 = !{i32 2, !"Debug Info Version", i32 3}
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!1 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "beards", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
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!2 = !DIFile(filename: "bees.cpp", directory: ".")
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!3 = !DILocalVariable(name: "flannel", scope: !4, file: !2, line: 1, type: !16)
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!4 = distinct !DISubprogram(name: "nope", scope: !2, file: !2, line: 1, spFlags: DISPFlagDefinition, unit: !1, retainedNodes: !13, type: !14, isDefinition: true)
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!8 = !DILocation(line: 4, scope: !4)
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!13 = !{!3}
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!14 = !DISubroutineType(types: !15)
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!15 = !{!16}
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!16 = !DIBasicType(name: "looong", size: 64, align: 64, encoding: DW_ATE_signed)
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!40 = distinct !DISubprogram(name: "toast", scope: !2, file: !2, line: 1, spFlags: DISPFlagDefinition, unit: !1, retainedNodes: !53, type: !14, isDefinition: true)
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!43 = !DILocalVariable(name: "charm", scope: !40, file: !2, line: 1, type: !16)
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!48 = !DILocation(line: 4, scope: !40)
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!53 = !{!43}
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!80 = distinct !DISubprogram(name: "mort", scope: !2, file: !2, line: 1, spFlags: DISPFlagDefinition, unit: !1, retainedNodes: !93, type: !14, isDefinition: true)
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!83 = !DILocalVariable(name: "bodkin", scope: !80, file: !2, line: 1, type: !16)
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!88 = !DILocation(line: 4, scope: !80)
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!93 = !{!83}
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...
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---
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name: foo
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tracksRegLiveness: true
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registers: []
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liveins:
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- { reg: '$rdi', virtual-reg: '' }
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body: |
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bb.0.entry:
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successors: %bb.1
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liveins: $rdi
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$ecx = XOR32rr undef $ecx, undef $ecx, implicit-def $eflags
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JMP_1 %bb.1
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bb.1.bb1 (align 4):
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successors: %bb.2
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liveins: $ecx, $rdi
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$eax = MOV32rr killed $ecx, implicit-def $rax
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DBG_VALUE $eax, $noreg, !3, !DIExpression(DW_OP_LLVM_fragment, 0, 32), debug-location !8
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JMP_1 %bb.2
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bb.2.bb2:
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successors: %bb.3
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liveins: $eax
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$ebx = MOV32rr $eax
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$ebx = ADD32ri8 $ebx, 3, implicit-def dead $eflags, implicit killed $rbx, implicit-def $rbx
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DBG_VALUE $ebx, $noreg, !3, !DIExpression(DW_OP_LLVM_fragment, 32, 32), debug-location !8
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JMP_1 %bb.3
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bb.3.bb3:
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liveins: $eax, $ebx
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$eax = XOR32rr killed $eax, killed $ebx, implicit-def $eflags
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RETQ $eax, debug-location !8
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...
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---
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name: bar
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tracksRegLiveness: true
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registers: []
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liveins:
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- { reg: '$rdi', virtual-reg: '' }
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body: |
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bb.0.entry:
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successors: %bb.1
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liveins: $rdi
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$ecx = XOR32rr undef $ecx, undef $ecx, implicit-def $eflags
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DBG_VALUE $cx, $noreg, !43, !DIExpression(DW_OP_LLVM_fragment, 0, 16), debug-location !48
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JMP_1 %bb.1
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bb.1.bb1:
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successors: %bb.2
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liveins: $ecx, $rdi
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$eax = MOV32rr killed $ecx, implicit-def $rax
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DBG_VALUE $ax, $noreg, !43, !DIExpression(DW_OP_LLVM_fragment, 8, 16), debug-location !48
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JMP_1 %bb.2
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bb.2.bb2:
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successors: %bb.3
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liveins: $eax
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$ebx = MOV32rr $eax
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$ebx = ADD32ri8 $ebx, 3, implicit-def dead $eflags, implicit killed $rbx, implicit-def $rbx
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DBG_VALUE $ebx, $noreg, !43, !DIExpression(DW_OP_LLVM_fragment, 32, 32), debug-location !48
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JMP_1 %bb.3
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bb.3.bb3:
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liveins: $eax, $ebx
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$eax = XOR32rr killed $eax, killed $ebx, implicit-def $eflags
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RETQ $eax, debug-location !48
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...
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---
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name: baz
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tracksRegLiveness: true
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registers: []
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liveins:
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- { reg: '$rdi', virtual-reg: '' }
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body: |
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bb.0.entry:
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successors: %bb.1
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liveins: $rdi
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$ecx = XOR32rr undef $ecx, undef $ecx, implicit-def $eflags
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DBG_VALUE $cx, $noreg, !83, !DIExpression(DW_OP_LLVM_fragment, 0, 16), debug-location !88
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JMP_1 %bb.1
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bb.1.bb1:
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successors: %bb.2
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liveins: $ecx, $rdi
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$eax = MOV32rr killed $ecx, implicit-def $rax
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DBG_VALUE $rdi, $noreg, !83, !DIExpression(), debug-location !88
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JMP_1 %bb.2
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bb.2.bb2:
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successors: %bb.3
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liveins: $eax
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$ebx = MOV32rr $eax
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$ebx = ADD32ri8 $ebx, 3, implicit-def dead $eflags, implicit killed $rbx, implicit-def $rbx
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DBG_VALUE $ebx, $noreg, !83, !DIExpression(DW_OP_LLVM_fragment, 32, 32), debug-location !88
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JMP_1 %bb.3
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bb.3.bb3:
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liveins: $eax, $ebx
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$eax = XOR32rr killed $eax, killed $ebx, implicit-def $eflags
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RETQ $eax, debug-location !88
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...
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