1# RUN: llc %s -o - -mtriple=x86_64-unknown-unknown \ 2# RUN: -experimental-debug-variable-locations -run-pass=livedebugvalues\ 3# RUN: | FileCheck %s 4# 5# Test that a DBG_INSTR_REF that refers to a DBG_PHI, will be translated into a 6# DBG_VALUE of the value read at that DBG_PHI. Same original code as 7# phi-coalescing.mir. 8# 9--- | 10 ; ModuleID = 'phi-coalescing.mir' 11 source_filename = "test.c" 12 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 13 target triple = "x86_64-unknown-linux-gnu" 14 15 define dso_local i32 @foo(i64 %bar, i64 %baz) !dbg !7 { 16 entry: 17 call void @llvm.dbg.value(metadata i64 %bar, metadata !12, metadata !DIExpression()), !dbg !13 18 call void @llvm.dbg.value(metadata i64 %baz, metadata !14, metadata !DIExpression()), !dbg !13 19 call void @ext(i64 %bar), !dbg !15 20 %add = add nsw i64 %bar, 12, !dbg !16 21 call void @llvm.dbg.value(metadata i64 %add, metadata !12, metadata !DIExpression()), !dbg !13 22 call void @ext(i64 %add), !dbg !17 23 %call = call i64 @getlong(), !dbg !18 24 %tobool = icmp ne i64 %call, 0, !dbg !18 25 br i1 %tobool, label %if.then, label %if.end, !dbg !20 26 27 if.then: ; preds = %entry 28 %add1 = add nsw i64 %add, 1, !dbg !21 29 call void @llvm.dbg.value(metadata i64 %add1, metadata !12, metadata !DIExpression()), !dbg !13 30 br label %if.end, !dbg !22 31 32 if.end: ; preds = %if.then, %entry 33 %bar.addr.0 = phi i64 [ %add1, %if.then ], [ %add, %entry ], !dbg !13 34 call void @llvm.dbg.value(metadata i64 %bar.addr.0, metadata !12, metadata !DIExpression()), !dbg !13 35 %add2 = add nsw i64 %bar.addr.0, %baz, !dbg !23 36 call void @llvm.dbg.value(metadata i64 %add2, metadata !12, metadata !DIExpression()), !dbg !13 37 call void @ext(i64 %add2), !dbg !24 38 %conv = trunc i64 %add2 to i32, !dbg !25 39 ret i32 %conv, !dbg !26 40 } 41 42 ; Function Attrs: nounwind readnone speculatable willreturn 43 declare void @llvm.dbg.declare(metadata, metadata, metadata) 44 45 declare dso_local void @ext(i64) 46 47 declare dso_local i64 @getlong() 48 49 ; Function Attrs: nounwind readnone speculatable willreturn 50 declare void @llvm.dbg.value(metadata, metadata, metadata) 51 52 !llvm.dbg.cu = !{!0} 53 !llvm.module.flags = !{!3, !4, !5} 54 !llvm.ident = !{!6} 55 56 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None) 57 !1 = !DIFile(filename: "test.c", directory: "/tmp/out.c") 58 !2 = !{} 59 !3 = !{i32 7, !"Dwarf Version", i32 4} 60 !4 = !{i32 2, !"Debug Info Version", i32 3} 61 !5 = !{i32 1, !"wchar_size", i32 4} 62 !6 = !{!""} 63 !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2) 64 !8 = !DISubroutineType(types: !9) 65 !9 = !{!10, !11, !11} 66 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 67 !11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed) 68 !12 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 3, type: !11) 69 !13 = !DILocation(line: 0, scope: !7) 70 !14 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 3, type: !11) 71 !15 = !DILocation(line: 4, column: 3, scope: !7) 72 !16 = !DILocation(line: 5, column: 7, scope: !7) 73 !17 = !DILocation(line: 6, column: 3, scope: !7) 74 !18 = !DILocation(line: 8, column: 7, scope: !19) 75 !19 = distinct !DILexicalBlock(scope: !7, file: !1, line: 8, column: 7) 76 !20 = !DILocation(line: 8, column: 7, scope: !7) 77 !21 = !DILocation(line: 9, column: 9, scope: !19) 78 !22 = !DILocation(line: 9, column: 5, scope: !19) 79 !23 = !DILocation(line: 11, column: 7, scope: !7) 80 !24 = !DILocation(line: 12, column: 3, scope: !7) 81 !25 = !DILocation(line: 13, column: 10, scope: !7) 82 !26 = !DILocation(line: 13, column: 3, scope: !7) 83 84... 85--- 86name: foo 87alignment: 16 88tracksRegLiveness: true 89debugInstrRef: true 90liveins: 91 - { reg: '$rdi' } 92 - { reg: '$rsi' } 93frameInfo: 94 stackSize: 24 95 offsetAdjustment: -24 96 maxAlignment: 1 97 adjustsStack: true 98 hasCalls: true 99 maxCallFrameSize: 0 100 cvBytesOfCalleeSavedRegisters: 16 101fixedStack: 102 - { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, callee-saved-register: '$rbx' } 103 - { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '$r14' } 104machineFunctionInfo: {} 105body: | 106 bb.0.entry: 107 liveins: $rdi, $rsi, $r14, $rbx 108 109 frame-setup PUSH64r killed $r14, implicit-def $rsp, implicit $rsp 110 CFI_INSTRUCTION def_cfa_offset 16 111 frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp 112 CFI_INSTRUCTION def_cfa_offset 24 113 frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp 114 CFI_INSTRUCTION def_cfa_offset 32 115 CFI_INSTRUCTION offset $rbx, -24 116 CFI_INSTRUCTION offset $r14, -16 117 $r14 = MOV64rr $rsi 118 $rbx = MOV64rr $rdi 119 CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !15 120 renamable $rbx = ADD64ri32 killed renamable $rbx, 12, implicit-def $eflags, debug-location !16 121 $rdi = MOV64rr $rbx, debug-location !17 122 CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !17 123 CALL64pcrel32 @getlong, csr_64, implicit $rsp, implicit $ssp, implicit-def $rax, debug-location !18 124 CMP64ri8 killed renamable $rax, 0, implicit-def $eflags, debug-location !18 125 JCC_1 %bb.2, 4, implicit $eflags, debug-location !20 126 127 bb.1.if.then: 128 liveins: $rbx, $r14 129 130 renamable $rbx = ADD64ri32 killed renamable $rbx, 1, implicit-def $eflags, debug-location !21 131 132 bb.2.if.end: 133 liveins: $rbx, $r14 134 135 DBG_PHI $rbx, 1 136 $rax = COPY $rbx 137 $rbx = MOV64ri 0 138 DBG_INSTR_REF !12, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !13 139 140 ; This sequence should mark the contents of rbx on block entry as being the 141 ; value for the variable at this DBG_INSTR_REF. We've force it to be in 142 ; $rax now, so we should see a DBG_VALUE for rax: 143 ; CHECK: DBG_PHI $rbx, 1 144 ; CHECK-NEXT: $rax = COPY $rbx 145 ; CHECK-NEXT: $rbx = MOV64ri 0 146 ; CHECK-NEXT: DBG_INSTR_REF {{.+}}, dbg-instr-ref(1, 0) 147 ; CHECK-NEXT: DBG_VALUE_LIST {{.+}} $rax 148 149 $rbx = COPY $rax 150 renamable $rbx = ADD64rr killed renamable $rbx, killed renamable $r14, implicit-def $eflags, debug-location !23 151 DBG_VALUE $rbx, $noreg, !12, !DIExpression(), debug-location !13 152 $rdi = MOV64rr $rbx, debug-location !24 153 CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !24 154 $eax = MOV32rr $ebx, implicit killed $rbx, debug-location !26 155 $rsp = frame-destroy ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !26 156 CFI_INSTRUCTION def_cfa_offset 24, debug-location !26 157 $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !26 158 CFI_INSTRUCTION def_cfa_offset 16, debug-location !26 159 $r14 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !26 160 CFI_INSTRUCTION def_cfa_offset 8, debug-location !26 161 RET64 implicit $eax, debug-location !26 162 163... 164