1 # RUN: llc --run-pass=livedebugvalues %s -o - -experimental-debug-variable-locations | FileCheck %s
3 ## Tests that when a block that is not directly reachable from the entry block
4 ## 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 not
7 ## directly reachable from the entry block not being fully covered by the
8 ## LiveDebugValues analysis.
10 # CHECK-DAG: ![[UNDEFVAR:[0-9]+]] = !DILocalVariable(name: "undef"
11 # CHECK-DAG: ![[DEFVAR:[0-9]+]] = !DILocalVariable(name: "def"
13 # CHECK-LABEL: bb.1.bb1
14 # CHECK: DBG_VALUE_LIST ![[UNDEFVAR]], {{.+}}, $noreg
15 # CHECK-LABEL: bb.4.bb3
16 # CHECK: DBG_VALUE_LIST ![[DEFVAR]], {{.+}}, $noreg
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"
24 @global = private constant [2 x ptr] [ptr blockaddress(@foo, %bb3), ptr blockaddress(@foo, %bb1)]
26 define ptr @foo() !dbg !4 {
31 call void @llvm.dbg.value(metadata i64 %phi, metadata !6, metadata !DIExpression()), !dbg !8
32 call void @llvm.dbg.value(metadata i64 %phi, metadata !9, metadata !DIExpression()), !dbg !8
33 store i32 0, ptr null, align 4, !dbg !10
34 %getelementptr = getelementptr i32, ptr null, i64 %phi
35 store i32 0, ptr %getelementptr, align 4
38 bb2: ; preds = %bb2, %bb1
39 %select = select i1 false, i1 false, i1 false
40 br i1 %select, label %bb3, label %bb2
42 bb3: ; preds = %bb2, %bb
43 %phi = phi i64 [ 1, %bb ], [ 0, %bb2 ]
47 declare void @llvm.dbg.value(metadata, metadata, metadata)
50 !llvm.module.flags = !{!3}
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: ".")
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)
68 tracksRegLiveness: true
70 tracksDebugUserValues: true
75 successors: %bb.1(0x80000000)
77 $ecx = MOV32ri 1, implicit-def $rcx
78 renamable $al = MOV8ri 1
80 bb.1.bb1 (ir-block-address-taken %ir-block.bb1, align 16):
81 successors: %bb.2(0x80000000)
84 DBG_INSTR_REF !6, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !8
85 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)
89 successors: %bb.3(0x04000000), %bb.2(0x7c000000)
92 TEST8rr renamable $al, renamable $al, implicit-def $eflags
93 JCC_1 %bb.2, 5, implicit killed $eflags
96 successors: %bb.1(0x80000000)
99 renamable $ecx = XOR32rr undef $ecx, undef $ecx, implicit-def dead $eflags, implicit-def $rcx
102 bb.4.bb3 (ir-block-address-taken %ir-block.bb3):
103 successors: %bb.1(0x80000000)
107 DBG_INSTR_REF !9, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !8