110 lines
4.2 KiB
YAML
110 lines
4.2 KiB
YAML
# RUN: llc --run-pass=livedebugvalues %s -o - -experimental-debug-variable-locations | FileCheck %s
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## Tests that when a block that is not directly reachable from the entry block
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## contains a DBG_PHI, we treat those DBG_PHIs as referring to live-in values,
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## and resolve them for users as normal.
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## FIXME: "def" currently does not have a value due to blocks that are not
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## directly reachable from the entry block not being fully covered by the
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## LiveDebugValues analysis.
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# CHECK-DAG: ![[UNDEFVAR:[0-9]+]] = !DILocalVariable(name: "undef"
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# CHECK-DAG: ![[DEFVAR:[0-9]+]] = !DILocalVariable(name: "def"
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# CHECK-LABEL: bb.1.bb1
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# CHECK: DBG_VALUE_LIST ![[UNDEFVAR]], {{.+}}, $noreg
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# CHECK-LABEL: bb.4.bb3
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# CHECK: DBG_VALUE_LIST ![[DEFVAR]], {{.+}}, $noreg
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--- |
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; ModuleID = 'llvm/test/DebugInfo/X86/instr-ref-unreachable.mir'
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source_filename = "/tmp/b.ll"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@global = private constant [2 x ptr] [ptr blockaddress(@foo, %bb3), ptr blockaddress(@foo, %bb1)]
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define ptr @foo() !dbg !4 {
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bb:
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br label %bb3
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bb1: ; preds = %bb3
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call void @llvm.dbg.value(metadata i64 %phi, metadata !6, metadata !DIExpression()), !dbg !8
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call void @llvm.dbg.value(metadata i64 %phi, metadata !9, metadata !DIExpression()), !dbg !8
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store i32 0, ptr null, align 4, !dbg !10
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%getelementptr = getelementptr i32, ptr null, i64 %phi
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store i32 0, ptr %getelementptr, align 4
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br label %bb2
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bb2: ; preds = %bb2, %bb1
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%select = select i1 false, i1 false, i1 false
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br i1 %select, label %bb3, label %bb2
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bb3: ; preds = %bb2, %bb
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%phi = phi i64 [ 1, %bb ], [ 0, %bb2 ]
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br label %bb1
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !2, imports: !2, splitDebugInlining: false, nameTableKind: GNU)
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!1 = !DIFile(filename: "test.cpp", directory: ".")
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!2 = !{}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = distinct !DISubprogram(name: "GetNumericFormat", linkageName: "f", scope: null, file: !1, line: 980, type: !5, scopeLine: 984, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
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!5 = distinct !DISubroutineType(types: !2)
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!6 = !DILocalVariable(name: "undef", scope: !4, file: !1, line: 263, type: !7)
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!7 = !DIBasicType(name: "unsigned long", size: 64, encoding: DW_ATE_unsigned)
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!8 = !DILocation(line: 0, scope: !4)
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!9 = !DILocalVariable(name: "def", scope: !4, file: !1, line: 263, type: !7)
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!10 = !DILocation(line: 151, column: 41, scope: !4)
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...
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---
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name: foo
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alignment: 16
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tracksRegLiveness: true
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debugInstrRef: true
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tracksDebugUserValues: true
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frameInfo:
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maxAlignment: 1
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body: |
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bb.0.bb:
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successors: %bb.1(0x80000000)
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$ecx = MOV32ri 1, implicit-def $rcx
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renamable $al = MOV8ri 1
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bb.1.bb1 (ir-block-address-taken %ir-block.bb1, align 16):
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successors: %bb.2(0x80000000)
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liveins: $al, $rcx
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DBG_INSTR_REF !6, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !8
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MOV32mi $noreg, 1, $noreg, 0, $noreg, 0, debug-location !10 :: (store (s32) into `ptr null`)
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MOV32mi $noreg, 4, killed renamable $rcx, 0, $noreg, 0 :: (store (s32) into %ir.getelementptr)
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bb.2.bb2 (align 16):
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successors: %bb.3(0x04000000), %bb.2(0x7c000000)
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liveins: $al
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TEST8rr renamable $al, renamable $al, implicit-def $eflags
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JCC_1 %bb.2, 5, implicit killed $eflags
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bb.3:
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successors: %bb.1(0x80000000)
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liveins: $al
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renamable $ecx = XOR32rr undef $ecx, undef $ecx, implicit-def dead $eflags, implicit-def $rcx
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JMP_1 %bb.1
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bb.4.bb3 (ir-block-address-taken %ir-block.bb3):
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successors: %bb.1(0x80000000)
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liveins: $al, $rcx
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DBG_PHI $rcx, 1
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DBG_INSTR_REF !9, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !8
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JMP_1 %bb.1
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...
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