--- /dev/null
+# RUN: llc %s -o - -run-pass=livedebugvalues -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefix=CHECK
+# RUN: llc %s -o - -start-before=livedebugvalues -filetype=obj -mtriple=x86_64-unknown-unknown | llvm-dwarfdump - | FileCheck %s --check-prefix=RANGES
+# Check that livedebugvalues does the right thing when register and constant
+# DBG_VALUEs interact, and that their ranges are correctly terminated by the
+# debug printing backend.
+--- |
+ ; All these IR functions are duds, see the MIR below.
+ source_filename = "<stdin>"
+ target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+
+ define i32 @foo(i32* %bees, i32* %output) !dbg !4 {
+ entry:
+ br i1 undef, label %bb1, label %bb1
+ bb1:
+ br label %bb3
+ bb2:
+ br label %bb3
+ bb3:
+ ret i32 0
+ }
+
+ define i32 @bar(i32* %bees, i32* %output) !dbg !40 {
+ entry:
+ br i1 undef, label %bb1, label %bb1
+ bb1:
+ br label %bb3
+ bb2:
+ br label %bb3
+ bb3:
+ ret i32 0
+ }
+
+ define i32 @baz(i32* %bees, i32* %output) !dbg !80 {
+ entry:
+ br i1 undef, label %bb1, label %bb1
+ bb1:
+ br label %bb3
+ bb2:
+ br label %bb3
+ bb3:
+ ret i32 0
+ }
+
+ define i32 @qux(i32* %bees, i32* %output) !dbg !120 {
+ entry:
+ br i1 undef, label %bb1, label %bb1
+ bb1:
+ br label %bb3
+ bb2:
+ br label %bb3
+ bb3:
+ ret i32 0
+ }
+
+ ; Function Attrs: nounwind readnone speculatable
+ declare void @llvm.dbg.value(metadata, metadata, metadata)
+
+ ; Function Attrs: nounwind readnone speculatable
+ declare void @llvm.dbg.declare(metadata, metadata, metadata)
+
+ ; Function Attrs: nounwind
+ declare void @llvm.stackprotector(i8*, i8**)
+
+ !llvm.module.flags = !{!0, !100}
+ !llvm.dbg.cu = !{!1}
+
+ !100 = !{i32 2, !"Dwarf Version", i32 4}
+ !0 = !{i32 2, !"Debug Info Version", i32 3}
+ !1 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "beards", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
+ !2 = !DIFile(filename: "bees.cpp", directory: ".")
+ !3 = !DILocalVariable(name: "flannel", scope: !4, file: !2, line: 1, type: !16)
+ !4 = distinct !DISubprogram(name: "nope", scope: !2, file: !2, line: 1, spFlags: DISPFlagDefinition, unit: !1, retainedNodes: !13, type: !14, isDefinition: true)
+ !5 = !DILocation(line: 0, scope: !4)
+ !6 = !DILocation(line: 1, scope: !4)
+ !7 = !DILocation(line: 2, scope: !4)
+ !8 = !DILocation(line: 4, scope: !4)
+ !9 = !DILocation(line: 5, scope: !4)
+ !10 = !DILocation(line: 6, scope: !4)
+ !11 = !DILocation(line: 7, scope: !4)
+ !12 = !DILocation(line: 8, scope: !4)
+ !13 = !{!3}
+ !14 = !DISubroutineType(types: !15)
+ !15 = !{!16}
+ !16 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+ !40 = distinct !DISubprogram(name: "bar", scope: !2, file: !2, line: 1, spFlags: DISPFlagDefinition, unit: !1, retainedNodes: !13, type: !14, isDefinition: true)
+ !41 = !DILocalVariable(name: "towel", scope: !40, file: !2, line: 1, type: !16)
+ !42 = !DILocation(line: 40, scope: !40)
+ !80 = distinct !DISubprogram(name: "baz", scope: !2, file: !2, line: 1, spFlags: DISPFlagDefinition, unit: !1, retainedNodes: !13, type: !14, isDefinition: true)
+ !81 = !DILocalVariable(name: "socks", scope: !80, file: !2, line: 1, type: !16)
+ !82 = !DILocation(line: 40, scope: !80)
+ !120 = distinct !DISubprogram(name: "qux", scope: !2, file: !2, line: 1, spFlags: DISPFlagDefinition, unit: !1, retainedNodes: !13, type: !14, isDefinition: true)
+ !121 = !DILocalVariable(name: "shoes", scope: !120, file: !2, line: 1, type: !16)
+ !122 = !DILocation(line: 40, scope: !120)
+
+...
+---
+name: foo
+alignment: 4
+tracksRegLiveness: true
+registers: []
+liveins:
+ - { reg: '$rdi', virtual-reg: '' }
+body: |
+
+ ; Two DBG_VALUEs for eax merge into bb3, check that livedebugvalues propagates
+ ; the location.
+ ; CHECK-LABEL: name: foo
+ ; CHECK-LABEL: bb.1.bb1
+ ; CHECK: $eax = MOV32rr
+ ; CHECK-NEXT: DBG_VALUE $eax
+ ; CHECK-NEXT: JMP_1 %bb.3
+ ; CHECK-LABEL: bb.2.bb2
+ ; CHECK: $eax = ADD32ri8
+ ; CHECK-NEXT: DBG_VALUE $eax
+ ; CHECK-NEXT: JMP_1 %bb.3
+ ; CHECK-LABEL: bb.3.bb3
+ ; CHECK: DBG_VALUE $eax
+ ; Test for there being a location-list gap between bb1 and bb2, as the
+ ; variable does not have a location over the ADD32ri. The range should also
+ ; extend over the final bb.
+ ; RANGES-LABEL: DW_TAG_subprogram
+ ; RANGES: DW_AT_high_pc (0x[[NOPEHIGHPC:[0-9a-f]+]])
+ ; RANGES-LABEL: DW_AT_name ("nope")
+ ; RANGES: DW_AT_location (0x{{[0-9a-f]+}}
+ ; RANGES-NEXT: [0x{{[0-9a-f]+}}, 0x[[NOPEADDR:[0-9a-f]+]]): DW_OP_reg0 RAX
+ ; RANGES-NEXT: [
+ ; RANGES-NOT: 0x[[NOPEADDR]]
+ ; RANGES-SAME: , 0x[[NOPEHIGHPC]]): DW_OP_reg0 RAX
+
+ bb.0.entry:
+ successors: %bb.1, %bb.2
+ liveins: $rdi
+
+ $ecx = XOR32rr undef $ecx, undef $ecx, implicit-def $eflags
+ JCC_1 %bb.1, 2, implicit killed $eflags
+ JMP_1 %bb.2
+
+ bb.1.bb1 (align 4):
+ successors: %bb.3
+ liveins: $ecx, $rdi
+
+ $eax = MOV32rr killed $ecx, implicit-def $rax
+ DBG_VALUE $eax, $noreg, !3, !DIExpression(), debug-location !8
+ JMP_1 %bb.3
+
+ bb.2.bb2:
+ successors: %bb.3
+ liveins: $rax
+
+ $eax = ADD32ri8 $eax, 3, implicit-def dead $eflags, implicit killed $rax, implicit-def $rax
+ DBG_VALUE $eax, $noreg, !3, !DIExpression(), debug-location !8
+ JMP_1 %bb.3
+
+ bb.3.bb3:
+ liveins: $rax
+ RETQ $eax, debug-location !9
+
+...
+---
+name: bar
+alignment: 4
+tracksRegLiveness: true
+registers: []
+liveins:
+ - { reg: '$rdi', virtual-reg: '' }
+body: |
+ ; Two DBG_VALUEs, one for eax, the other for zero, merge into bb3. Check that
+ ; livedebugvalues does not propagate anything.
+ ; the location.
+ ; CHECK-LABEL: name: bar
+ ; CHECK-LABEL: bb.1.bb1
+ ; CHECK: $eax = MOV32rr
+ ; CHECK-NEXT: DBG_VALUE 0
+ ; CHECK-NEXT: JMP_1 %bb.3
+ ; CHECK-LABEL: bb.2.bb2
+ ; CHECK: $eax = ADD32ri8
+ ; CHECK-NEXT: DBG_VALUE $eax
+ ; CHECK-NEXT: JMP_1 %bb.3
+ ; CHECK-LABEL: bb.3.bb3
+ ; CHECK-NOT: DBG_VALUE
+ ; Test for there being a location-list gap between bb1 and bb2, the variable
+ ; should not have a location over the ADD32ri. The range of the last entry
+ ; should not cover the last block.
+ ; RANGES-LABEL: DW_TAG_subprogram
+ ; RANGES: DW_AT_high_pc (0x[[BARHIGHPC:[0-9a-f]+]])
+ ; RANGES-LABEL: DW_AT_name ("bar")
+ ; RANGES: DW_AT_location (0x{{[0-9a-f]+}}
+ ; RANGES-NEXT: [0x{{[0-9a-f]+}}, 0x[[BARADDR:[0-9a-f]+]]): DW_OP_consts +0, DW_OP_stack_value
+ ; RANGES-NEXT: [
+ ; RANGES-NOT: 0x[[BARADDR]]
+ ; RANGES-NOT: 0x[[BARHIGHPC]]
+ ; RANGES-SAME: ): DW_OP_reg0 RAX
+
+ bb.0.entry:
+ successors: %bb.1, %bb.2
+ liveins: $rdi
+
+ $ecx = XOR32rr undef $ecx, undef $ecx, implicit-def $eflags
+ JCC_1 %bb.1, 2, implicit killed $eflags
+ JMP_1 %bb.2
+
+ bb.1.bb1 (align 4):
+ successors: %bb.3
+ liveins: $ecx, $rdi
+
+ $eax = MOV32rr killed $ecx, implicit-def $rax
+ DBG_VALUE 0, $noreg, !41, !DIExpression(), debug-location !42
+ JMP_1 %bb.3
+
+ bb.2.bb2:
+ successors: %bb.3
+ liveins: $rax
+
+ $eax = ADD32ri8 $eax, 3, implicit-def dead $eflags, implicit killed $rax, implicit-def $rax
+ DBG_VALUE $eax, $noreg, !41, !DIExpression(), debug-location !42
+ JMP_1 %bb.3
+
+ bb.3.bb3:
+ liveins: $rax
+ RETQ $eax, debug-location !42
+
+...
+---
+name: baz
+alignment: 4
+tracksRegLiveness: true
+registers: []
+liveins:
+ - { reg: '$rdi', virtual-reg: '' }
+body: |
+ ; Two DBG_VALUEs, one for zero, the other for eax, merge into bb3. Check that
+ ; livedebugvalues does not propagate anything.
+ ; the location.
+ ; CHECK-LABEL: name: baz
+ ; CHECK-LABEL: bb.1.bb1
+ ; CHECK: $eax = MOV32rr
+ ; CHECK-NEXT: DBG_VALUE $eax
+ ; CHECK-NEXT: JMP_1 %bb.3
+ ; CHECK-LABEL: bb.2.bb2
+ ; CHECK: $eax = ADD32ri8
+ ; CHECK-NEXT: DBG_VALUE 0
+ ; CHECK-NEXT: JMP_1 %bb.3
+ ; CHECK-LABEL: bb.3.bb3
+ ; CHECK-NOT: DBG_VALUE
+ ; Test for there being a location-list gap between bb1 and bb2, the variable
+ ; should not have a location over the ADD32ri. The range of the last item
+ ; should not cover the last block.
+ ; RANGES-LABEL: DW_TAG_subprogram
+ ; RANGES: DW_AT_high_pc (0x[[BAZHIGHPC:[0-9a-f]+]])
+ ; RANGES-LABEL: DW_AT_name ("baz")
+ ; RANGES: DW_AT_location (0x{{[0-9a-f]+}}
+ ; RANGES-NEXT: [0x{{[0-9a-f]+}}, 0x[[BAZADDR:[0-9a-f]+]]): DW_OP_reg0 RAX
+ ; RANGES-NEXT: [
+ ; RANGES-NOT: 0x[[BAZADDR]]
+ ; RANGES-NOT: 0x[[BAZHIGHPC]]
+ ; RANGES-SAME: ): DW_OP_consts +0, DW_OP_stack_value
+
+ bb.0.entry:
+ successors: %bb.1, %bb.2
+ liveins: $rdi
+
+ $ecx = XOR32rr undef $ecx, undef $ecx, implicit-def $eflags
+ JCC_1 %bb.1, 2, implicit killed $eflags
+ JMP_1 %bb.2
+
+ bb.1.bb1 (align 4):
+ successors: %bb.3
+ liveins: $ecx, $rdi
+
+ $eax = MOV32rr killed $ecx, implicit-def $rax
+ DBG_VALUE $eax, $noreg, !81, !DIExpression(), debug-location !82
+ JMP_1 %bb.3
+
+ bb.2.bb2:
+ successors: %bb.3
+ liveins: $rax
+
+ $eax = ADD32ri8 $eax, 3, implicit-def dead $eflags, implicit killed $rax, implicit-def $rax
+ DBG_VALUE 0, $noreg, !81, !DIExpression(), debug-location !82
+ JMP_1 %bb.3
+
+ bb.3.bb3:
+ liveins: $rax
+ RETQ $eax, debug-location !82
+
+...
+---
+name: qux
+alignment: 4
+tracksRegLiveness: true
+registers: []
+liveins:
+ - { reg: '$rdi', virtual-reg: '' }
+body: |
+ ; Two DBG_VALUEs for zero merging into bb3, Check that livedebugvalues does
+ ; propagate the zero into the merging block.
+ ; CHECK-LABEL: name: qux
+ ; CHECK-LABEL: bb.1.bb1
+ ; CHECK: $eax = MOV32rr
+ ; CHECK-NEXT: DBG_VALUE 0
+ ; CHECK-NEXT: JMP_1 %bb.3
+ ; CHECK-LABEL: bb.2.bb2
+ ; CHECK: $eax = ADD32ri8
+ ; CHECK-NEXT: DBG_VALUE 0
+ ; CHECK-NEXT: JMP_1 %bb.3
+ ; CHECK-LABEL: bb.3.bb3
+ ; CHECK: DBG_VALUE 0
+ ; Test for there being a location-list gap between bb1 and bb2, the variable
+ ; should not have a location over the ADD32ri. The final entry should cover
+ ; the final block.
+ ; RANGES-LABEL: DW_TAG_subprogram
+ ; RANGES: DW_AT_high_pc (0x[[QUXHIGHPC:[0-9a-f]+]])
+ ; RANGES-LABEL: DW_AT_name ("qux")
+ ; RANGES: DW_AT_location (0x{{[0-9a-f]+}}
+ ; RANGES-NEXT: [0x{{[0-9a-f]+}}, 0x[[QUXADDR:[0-9a-f]+]]): DW_OP_consts +0, DW_OP_stack_value
+ ; RANGES-NOT: 0x[[QUXADDR]]
+ ; RANGES-NEXT: [0x{{[0-9a-f]+}}, 0x[[QUXHIGHPC]]): DW_OP_consts +0, DW_OP_stack_value
+
+ bb.0.entry:
+ successors: %bb.1, %bb.2
+ liveins: $rdi
+
+ $ecx = XOR32rr undef $ecx, undef $ecx, implicit-def $eflags
+ JCC_1 %bb.1, 2, implicit killed $eflags
+ JMP_1 %bb.2
+
+ bb.1.bb1 (align 4):
+ successors: %bb.3
+ liveins: $ecx, $rdi
+
+ $eax = MOV32rr killed $ecx, implicit-def $rax
+ DBG_VALUE 0, $noreg, !121, !DIExpression(), debug-location !122
+ JMP_1 %bb.3
+
+ bb.2.bb2:
+ successors: %bb.3
+ liveins: $rax
+
+ $eax = ADD32ri8 $eax, 3, implicit-def dead $eflags, implicit killed $rax, implicit-def $rax
+ DBG_VALUE 0, $noreg, !121, !DIExpression(), debug-location !122
+ JMP_1 %bb.3
+
+ bb.3.bb3:
+ liveins: $rax
+ RETQ $eax, debug-location !122
+
+...
projects / llvm / commitdiff