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      1 # Verify that a CFI instruction with no debug location
      2 # does not result in a line-0 location in the assembler.
      3 # RUN: %llc_dwarf -start-after=prologepilog -march=x86-64 -use-unknown-locations=Enable %s -o - | FileCheck %s
      4 #
      5 # CHECK-NOT: .loc 1 0
      6 # CHECK:     .cfi_def_cfa_offset
      7 # UNSUPPORTED: cygwin,mingw32,win32,x86_64-pc-windows-gnu
      8 
      9 --- |
     10   ; ModuleID = 'no-cfi-loc.ll'
     11   source_filename = "no-cfi-loc.ll"
     12   target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
     13   
     14   define void @foo() !dbg !6 {
     15   entry:
     16     call void @bar(), !dbg !8
     17     ret void, !dbg !9
     18   }
     19   
     20   declare void @bar()
     21   
     22   ; Function Attrs: nounwind
     23   declare void @llvm.stackprotector(i8*, i8**) #0
     24   
     25   attributes #0 = { nounwind }
     26   
     27   !llvm.dbg.cu = !{!0}
     28   !llvm.module.flags = !{!3, !4}
     29   !llvm.ident = !{!5}
     30   
     31   !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0 (trunk 288778)", isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2)
     32   !1 = !DIFile(filename: "t.c", directory: "/home/probinson/projects/scratch")
     33   !2 = !{}
     34   !3 = !{i32 2, !"Dwarf Version", i32 4}
     35   !4 = !{i32 2, !"Debug Info Version", i32 3}
     36   !5 = !{!"clang version 4.0.0 (trunk 288778)"}
     37   !6 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !7, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
     38   !7 = !DISubroutineType(types: !2)
     39   !8 = !DILocation(line: 3, column: 2, scope: !6)
     40   !9 = !DILocation(line: 4, column: 1, scope: !6)
     41 
     42 ...
     43 ---
     44 name:            foo
     45 alignment:       4
     46 exposesReturnsTwice: false
     47 legalized:       false
     48 regBankSelected: false
     49 selected:        false
     50 tracksRegLiveness: true
     51 calleeSavedRegisters: [ '$bh', '$bl', '$bp', '$bpl', '$bx', '$ebp', '$ebx', 
     52                         '$rbp', '$rbx', '$r12', '$r13', '$r14', '$r15', 
     53                         '$r12b', '$r13b', '$r14b', '$r15b', '$r12d', '$r13d', 
     54                         '$r14d', '$r15d', '$r12w', '$r13w', '$r14w', '$r15w' ]
     55 frameInfo:       
     56   isFrameAddressTaken: false
     57   isReturnAddressTaken: false
     58   hasStackMap:     false
     59   hasPatchPoint:   false
     60   stackSize:       8
     61   offsetAdjustment: 0
     62   maxAlignment:    0
     63   adjustsStack:    true
     64   hasCalls:        true
     65   maxCallFrameSize: 0
     66   hasOpaqueSPAdjustment: false
     67   hasVAStart:      false
     68   hasMustTailInVarArgFunc: false
     69 body:             |
     70   bb.0.entry:
     71     frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp, debug-location !8
     72     CFI_INSTRUCTION def_cfa_offset 16
     73     CALL64pcrel32 @bar, csr_64, implicit $rsp, implicit-def $rsp, debug-location !8
     74     $rax = POP64r implicit-def $rsp, implicit $rsp, debug-location !9
     75     RET 0, debug-location !9
     76 
     77 ...
     78