1# RUN: llc %s -mtriple=x86_64 -run-pass=livedebugvalues -experimental-debug-variable-locations -o - 2>&1 | FileCheck %s 2# 3# Test that we can spill and restore through subregisters too. In this test, 4# eax is def'd and then spilt, but as part of a larger register. 5--- | 6 define i8 @test(i32 %bar) local_unnamed_addr !dbg !7 { 7 entry: 8 ret i8 0, !dbg !12 9 } 10 11 declare dso_local void @ext(i64) 12 13 !llvm.dbg.cu = !{!0} 14 !llvm.module.flags = !{!3, !4, !5, !6} 15 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug) 16 !1 = !DIFile(filename: "foo.cpp", directory: ".") 17 !2 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed) 18 !3 = !{i32 2, !"Dwarf Version", i32 4} 19 !4 = !{i32 2, !"Debug Info Version", i32 3} 20 !5 = !{i32 1, !"wchar_size", i32 2} 21 !6 = !{i32 7, !"PIC Level", i32 2} 22 !7 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !1, file: !1, line: 6, type: !8, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10) 23 !8 = !DISubroutineType(types: !9) 24 !9 = !{!2, !2} 25 !10 = !{!11} 26 !11 = !DILocalVariable(name: "baz", scope: !7, file: !1, line: 7, type: !2) 27 !12 = !DILocation(line: 10, scope: !7) 28... 29--- 30name: test 31tracksRegLiveness: true 32debugInstrRef: true 33liveins: 34 - { reg: '$rdi', virtual-reg: '' } 35stack: 36 - { id: 0, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8, 37 stack-id: default, callee-saved-register: '', callee-saved-restored: true, 38 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } 39body: | 40 bb.0: 41 liveins: $rdi, $rax, $rbx 42 $eax = MOV32ri 0, debug-instr-number 1 43 $edi = COPY $eax 44 MOV64mr $rsp, 1, $noreg, 16, $noreg, $rdi :: (store 8 into %stack.0) 45 $rsi = MOV64rm $rsp, 1, $noreg, 8, $noreg :: (load 8 from %stack.0) 46 47 ; Store a random value onto stack, forces value to be in one place only. 48 ; Clobber other registers that contain the value we're to track. 49 MOV64mr $rsp, 1, $noreg, 16, $noreg, $rbx :: (store 8 into %stack.0) 50 $rax = MOV64ri 0 51 $rdi = MOV64ri 0 52 53 DBG_INSTR_REF !11, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !12 54 ; CHECK: DBG_INSTR_REF 55 ; CHECK-NEXT: DBG_VALUE_LIST {{.+}}, $esi 56 RET64 $rsi, debug-location !12 57... 58