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1# RUN: llc --run-pass=livedebugvalues %s -o - -experimental-debug-variable-locations | FileCheck %s2 3## Tests that when a block that is not directly reachable from the entry block4## contains a DBG_PHI, we treat those DBG_PHIs as referring to live-in values,5## and resolve them for users as normal.6## FIXME: "def" currently does not have a value due to blocks that are not7## directly reachable from the entry block not being fully covered by the8## LiveDebugValues analysis.9 10# CHECK-DAG: ![[UNDEFVAR:[0-9]+]] = !DILocalVariable(name: "undef"11# CHECK-DAG: ![[DEFVAR:[0-9]+]] = !DILocalVariable(name: "def"12 13# CHECK-LABEL: bb.1.bb114# CHECK: DBG_VALUE_LIST ![[UNDEFVAR]], {{.+}}, $noreg15# CHECK-LABEL: bb.4.bb316# CHECK: DBG_VALUE_LIST ![[DEFVAR]], {{.+}}, $noreg17 18--- |19 ; ModuleID = 'llvm/test/DebugInfo/X86/instr-ref-unreachable.mir'20 source_filename = "/tmp/b.ll"21 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"22 target triple = "x86_64-unknown-linux-gnu"23 24 @global = private constant [2 x ptr] [ptr blockaddress(@foo, %bb3), ptr blockaddress(@foo, %bb1)]25 26 define ptr @foo() !dbg !4 {27 bb:28 br label %bb329 30 bb1: ; preds = %bb331 call void @llvm.dbg.value(metadata i64 %phi, metadata !6, metadata !DIExpression()), !dbg !832 call void @llvm.dbg.value(metadata i64 %phi, metadata !9, metadata !DIExpression()), !dbg !833 store i32 0, ptr null, align 4, !dbg !1034 %getelementptr = getelementptr i32, ptr null, i64 %phi35 store i32 0, ptr %getelementptr, align 436 br label %bb237 38 bb2: ; preds = %bb2, %bb139 %select = select i1 false, i1 false, i1 false40 br i1 %select, label %bb3, label %bb241 42 bb3: ; preds = %bb2, %bb43 %phi = phi i64 [ 1, %bb ], [ 0, %bb2 ]44 br label %bb145 }46 47 declare void @llvm.dbg.value(metadata, metadata, metadata)48 49 !llvm.dbg.cu = !{!0}50 !llvm.module.flags = !{!3}51 52 !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)53 !1 = !DIFile(filename: "test.cpp", directory: ".")54 !2 = !{}55 !3 = !{i32 2, !"Debug Info Version", i32 3}56 !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)57 !5 = distinct !DISubroutineType(types: !2)58 !6 = !DILocalVariable(name: "undef", scope: !4, file: !1, line: 263, type: !7)59 !7 = !DIBasicType(name: "unsigned long", size: 64, encoding: DW_ATE_unsigned)60 !8 = !DILocation(line: 0, scope: !4)61 !9 = !DILocalVariable(name: "def", scope: !4, file: !1, line: 263, type: !7)62 !10 = !DILocation(line: 151, column: 41, scope: !4)63 64...65---66name: foo67alignment: 1668tracksRegLiveness: true69debugInstrRef: true70tracksDebugUserValues: true71frameInfo:72 maxAlignment: 173body: |74 bb.0.bb:75 successors: %bb.1(0x80000000)76 77 $ecx = MOV32ri 1, implicit-def $rcx78 renamable $al = MOV8ri 179 80 bb.1.bb1 (ir-block-address-taken %ir-block.bb1, align 16):81 successors: %bb.2(0x80000000)82 liveins: $al, $rcx83 84 DBG_INSTR_REF !6, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !885 MOV32mi $noreg, 1, $noreg, 0, $noreg, 0, debug-location !10 :: (store (s32) into `ptr null`)86 MOV32mi $noreg, 4, killed renamable $rcx, 0, $noreg, 0 :: (store (s32) into %ir.getelementptr)87 88 bb.2.bb2 (align 16):89 successors: %bb.3(0x04000000), %bb.2(0x7c000000)90 liveins: $al91 92 TEST8rr renamable $al, renamable $al, implicit-def $eflags93 JCC_1 %bb.2, 5, implicit killed $eflags94 95 bb.3:96 successors: %bb.1(0x80000000)97 liveins: $al98 99 renamable $ecx = XOR32rr undef $ecx, undef $ecx, implicit-def dead $eflags, implicit-def $rcx100 JMP_1 %bb.1101 102 bb.4.bb3 (ir-block-address-taken %ir-block.bb3):103 successors: %bb.1(0x80000000)104 liveins: $al, $rcx105 106 DBG_PHI $rcx, 1107 DBG_INSTR_REF !9, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !8108 JMP_1 %bb.1109 110...111