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1# Check that the backend can produce a branch-on-count instruction also in2# the presence of a DEBUG_VALUE machine instruction.3#4# RUN: llc %s -mtriple=s390x-linux-gnu -mcpu=z13 -start-before=postrapseudos \5# RUN: -o - 2>&1 | FileCheck %s6#7# CHECK: brctg8 9--- |10 11 define dso_local void @put_charge_groups_in_box() local_unnamed_addr #0 !dbg !5 {12 bb:13 br label %bb214 15 bb2: ; preds = %bb2, %bb3, %bb16 br i1 undef, label %bb2, label %bb3.preheader17 18 bb3.preheader: ; preds = %bb219 br label %bb320 21 bb3: ; preds = %bb3.preheader, %bb322 %tmp4 = phi i64 [ %tmp6, %bb3 ], [ 2, %bb3.preheader ]23 %tmp6 = add nsw i64 %tmp4, -124 ; Keep the dbg metadata live by referencing it in the IR.25 call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !7, metadata !DIExpression())26 %tmp8 = icmp eq i64 %tmp6, 027 br i1 %tmp8, label %bb2, label %bb328 }29 30 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #131 32 declare void @llvm.stackprotector(ptr, ptr) #233 34 attributes #0 = { "target-cpu"="z13" "use-soft-float"="false" }35 attributes #1 = { nounwind readnone speculatable "target-cpu"="z13" }36 attributes #2 = { nounwind }37 38 !llvm.dbg.cu = !{!0}39 !llvm.module.flags = !{!3, !4}40 41 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "llvm", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)42 !1 = !DIFile(filename: "test.ll", directory: "/tmp")43 !2 = !{}44 !3 = !{i32 2, !"Dwarf Version", i32 4}45 !4 = !{i32 2, !"Debug Info Version", i32 3}46 !5 = distinct !DISubprogram(name: "test_dbg_value", scope: !1, file: !1, line: 1, type: !6, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)47 !6 = !DISubroutineType(types: !2)48 !7 = !DILocalVariable(name: "in", arg: 1, scope: !5, file: !1, line: 1, type: !8)49 !8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)50 !9 = !DILocation(line: 1, column: 1, scope: !5)51 52...53---54name: put_charge_groups_in_box55alignment: 1656tracksRegLiveness: true57frameInfo: 58 maxCallFrameSize: 059body: |60 bb.0.bb:61 renamable $r0l = LHIMux 062 63 bb.1.bb2:64 liveins: $r0l65 66 CHIMux renamable $r0l, 0, implicit-def $cc67 BRC 14, 6, %bb.1, implicit killed $cc68 69 bb.2.bb3.preheader:70 liveins: $r0l71 72 renamable $r1d = LGHI 273 74 bb.3.bb3:75 successors: %bb.1(0x04000000), %bb.3(0x7c000000)76 liveins: $r1d, $r0l77 78 renamable $r1d = nsw AGHI killed renamable $r1d, -1, implicit-def dead $cc79 DBG_VALUE $r1d, $noreg, !7, !DIExpression(), debug-location !980 CGHI renamable $r1d, 0, implicit-def $cc81 DBG_VALUE $r1d, $noreg, !7, !DIExpression(), debug-location !982 BRC 14, 6, %bb.3, implicit $cc83 J %bb.184 85...86