1# RUN: llc %s -o - -run-pass=livedebugvalues -mtriple=x86_64-unknown-unknown | FileCheck %s 2# RUN: llc %s -o - -force-instr-ref-livedebugvalues=1 -run-pass=livedebugvalues -mtriple=x86_64-unknown-unknown | FileCheck %s 3# 4# In this lightly modified test case, the transfer in the entry block from 5# geti32's return value in $eax to the non-volatile $ebx should be recognized, 6# and propagated throughout the whole function. 7# 8# CHECK-LABEL: bb.0.entry 9# CHECK: DBG_VALUE $eax 10# CHECK: DBG_VALUE $ebx 11# CHECK-LABEL: bb.1.loop2 12# CHECK: DBG_VALUE $ebx 13# CHECK-LABEL: bb.2.loop 14# CHECK: DBG_VALUE $ebx 15# CHECK-LABEL: bb.3.exit 16# CHECK: DBG_VALUE $ebx 17--- | 18 ; ModuleID = 'asdf' 19 source_filename = "asdf.ll" 20 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 21 target triple = "x86_64-unknown-unknown" 22 23 @glob = global i32 0 24 25 declare i1 @booler() 26 27 declare i32 @geti32() 28 29 declare void @escape(i32) 30 31 ; Function Attrs: nounwind readnone speculatable willreturn 32 declare void @llvm.dbg.value(metadata, metadata, metadata) 33 34 define i32 @foo() !dbg !4 { 35 entry: 36 %bar = call i32 @geti32(), !dbg !10 37 call void @llvm.dbg.value(metadata i32 %bar, metadata !9, metadata !DIExpression()), !dbg !10 38 br label %loop 39 40 loop: ; preds = %loop2, %entry 41 call void @escape(i32 %bar) 42 %retval = call i1 @booler(), !dbg !10 43 br i1 %retval, label %loop2, label %exit 44 45 loop2: ; preds = %loop 46 store i32 %bar, ptr @glob 47 br label %loop 48 49 exit: ; preds = %loop 50 ret i32 %bar 51 } 52 53 ; Function Attrs: nounwind 54 declare void @llvm.stackprotector(ptr, ptr) 55 56 !llvm.module.flags = !{!0, !1} 57 !llvm.dbg.cu = !{!2} 58 59 !0 = !{i32 2, !"Debug Info Version", i32 3} 60 !1 = !{i32 2, !"Dwarf Version", i32 4} 61 !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "beards", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug) 62 !3 = !DIFile(filename: "bees.cpp", directory: ".") 63 !4 = distinct !DISubprogram(name: "nope", scope: !3, file: !3, line: 1, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !8) 64 !5 = !DISubroutineType(types: !6) 65 !6 = !{!7} 66 !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 67 !8 = !{!9} 68 !9 = !DILocalVariable(name: "toast", scope: !4, file: !3, line: 1, type: !7) 69 !10 = !DILocation(line: 1, scope: !4) 70 71... 72--- 73name: foo 74tracksRegLiveness: true 75frameInfo: 76 stackSize: 8 77 offsetAdjustment: -8 78 adjustsStack: true 79 hasCalls: true 80 cvBytesOfCalleeSavedRegisters: 8 81fixedStack: 82 - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default, 83 callee-saved-register: '$rbx', callee-saved-restored: true, debug-info-variable: '', 84 debug-info-expression: '', debug-info-location: '' } 85stack: [] 86body: | 87 bb.0.entry: 88 successors: %bb.1(0x80000000) 89 liveins: $rbx 90 91 frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp, debug-location !10 92 CFI_INSTRUCTION def_cfa_offset 16 93 CFI_INSTRUCTION offset $rbx, -16 94 CALL64pcrel32 @geti32, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !10 95 DBG_VALUE $eax, $noreg, !9, !DIExpression(), debug-location !10 96 $ebx = MOV32rr killed $eax, debug-location !10 97 JMP_1 %bb.1 98 99 bb.1.loop2: 100 successors: %bb.2 101 liveins: $ebx 102 103 MOV32mr $rip, 1, $noreg, @glob, $noreg, renamable $ebx :: (store (s32) into @glob) 104 105 bb.2.loop: 106 successors: %bb.1, %bb.3 107 liveins: $ebx 108 109 $edi = MOV32rr $ebx 110 CALL64pcrel32 @escape, csr_64, implicit $rsp, implicit $ssp, implicit killed $edi, implicit-def $rsp, implicit-def $ssp 111 CALL64pcrel32 @booler, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $al, debug-location !10 112 TEST8ri killed renamable $al, 1, implicit-def $eflags 113 JCC_1 %bb.1, 5, implicit $eflags 114 115 bb.3.exit: 116 liveins: $ebx 117 118 $eax = MOV32rr killed $ebx 119 $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp 120 CFI_INSTRUCTION def_cfa_offset 8 121 RET64 $eax 122 123... 124