86 lines
2.9 KiB
Plaintext
86 lines
2.9 KiB
Plaintext
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# Check that the backend can produce a branch-on-count instruction also in
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# the presence of a DEBUG_VALUE machine instruction.
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#
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# RUN: llc %s -mtriple=s390x-linux-gnu -mcpu=z13 -start-before=postrapseudos \
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# RUN: -o - 2>&1 | FileCheck %s
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#
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# CHECK: brctg
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--- |
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define dso_local void @put_charge_groups_in_box() local_unnamed_addr #0 !dbg !5 {
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bb:
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br label %bb2
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bb2: ; preds = %bb2, %bb3, %bb
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br i1 undef, label %bb2, label %bb3.preheader
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bb3.preheader: ; preds = %bb2
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br label %bb3
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bb3: ; preds = %bb3.preheader, %bb3
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%tmp4 = phi i64 [ %tmp6, %bb3 ], [ 2, %bb3.preheader ]
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%tmp6 = add nsw i64 %tmp4, -1
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; Keep the dbg metadata live by referencing it in the IR.
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call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !7, metadata !DIExpression())
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%tmp8 = icmp eq i64 %tmp6, 0
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br i1 %tmp8, label %bb2, label %bb3
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}
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
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declare void @llvm.stackprotector(i8*, i8**) #2
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attributes #0 = { "target-cpu"="z13" "use-soft-float"="false" }
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attributes #1 = { nounwind readnone speculatable "target-cpu"="z13" }
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attributes #2 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "llvm", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "test.ll", directory: "/tmp")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!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)
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!6 = !DISubroutineType(types: !2)
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!7 = !DILocalVariable(name: "in", arg: 1, scope: !5, file: !1, line: 1, type: !8)
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!8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!9 = !DILocation(line: 1, column: 1, scope: !5)
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...
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---
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name: put_charge_groups_in_box
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alignment: 16
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tracksRegLiveness: true
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frameInfo:
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maxCallFrameSize: 0
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body: |
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bb.0.bb:
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renamable $r0l = LHIMux 0
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bb.1.bb2:
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liveins: $r0l
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CHIMux renamable $r0l, 0, implicit-def $cc
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BRC 14, 6, %bb.1, implicit killed $cc
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bb.2.bb3.preheader:
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liveins: $r0l
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renamable $r1d = LGHI 2
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bb.3.bb3:
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successors: %bb.1(0x04000000), %bb.3(0x7c000000)
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liveins: $r1d, $r0l
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renamable $r1d = nsw AGHI killed renamable $r1d, -1, implicit-def dead $cc
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DBG_VALUE $r1d, $noreg, !7, !DIExpression(), debug-location !9
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CGHI renamable $r1d, 0, implicit-def $cc
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DBG_VALUE $r1d, $noreg, !7, !DIExpression(), debug-location !9
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BRC 14, 6, %bb.3, implicit $cc
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J %bb.1
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...
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