| # RUN: llc %s -march=x86-64 -run-pass=livedebugvalues -experimental-debug-variable-locations -o - 2>&1 | FileCheck %s |
| # |
| # Test that we can spill and restore through subregisters too. In this test, |
| # eax is def'd and then spilt, but as part of a larger register. |
| --- | |
| define i8 @test(i32 %bar) local_unnamed_addr !dbg !7 { |
| entry: |
| ret i8 0, !dbg !12 |
| } |
| |
| declare dso_local void @ext(i64) |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5, !6} |
| !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug) |
| !1 = !DIFile(filename: "foo.cpp", directory: ".") |
| !2 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed) |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 2} |
| !6 = !{i32 7, !"PIC Level", i32 2} |
| !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) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{!2, !2} |
| !10 = !{!11} |
| !11 = !DILocalVariable(name: "baz", scope: !7, file: !1, line: 7, type: !2) |
| !12 = !DILocation(line: 10, scope: !7) |
| ... |
| --- |
| name: test |
| tracksRegLiveness: true |
| liveins: |
| - { reg: '$rdi', virtual-reg: '' } |
| stack: |
| - { id: 0, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8, |
| stack-id: default, callee-saved-register: '', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| body: | |
| bb.0: |
| liveins: $rdi, $rax, $rbx |
| $eax = MOV32ri 0, debug-instr-number 1 |
| $edi = COPY $eax |
| MOV64mr $rsp, 1, $noreg, 16, $noreg, $rdi :: (store 8 into %stack.0) |
| $rsi = MOV64rm $rsp, 1, $noreg, 8, $noreg :: (load 8 from %stack.0) |
| |
| ; Store a random value onto stack, forces value to be in one place only. |
| ; Clobber other registers that contain the value we're to track. |
| MOV64mr $rsp, 1, $noreg, 16, $noreg, $rbx :: (store 8 into %stack.0) |
| $rax = MOV64ri 0 |
| $rdi = MOV64ri 0 |
| |
| DBG_INSTR_REF 1, 0, !11, !DIExpression(), debug-location !12 |
| ; CHECK: DBG_INSTR_REF |
| ; CHECK-NEXT: DBG_VALUE $esi |
| RET64 $rsi, debug-location !12 |
| ... |
