59fab22642
This patch adds support for CloneBasicBlock duplicating the DPValues attached to instructions, and adds facilities to remap them into their new context. The plumbing to achieve this is fairly straightforwards and mechanical. I've also added illustrative uses to LoopUnrollRuntime, SimpleLoopUnswitch and SimplifyCFG. The former only updates for the epilogue right now so I've added CHECK lines just for the end of an unrolled loop (further updates coming later). SimpleLoopUnswitch had no debug-info tests so I've added a new one. The two modified parts of SimplifyCFG are covered by the two modified SimplifyCFG tests. These are scenarios where we have to do extra cloning for copying of DPValues because they're no longer instructions, and remap them too.
96 lines
4.5 KiB
LLVM
96 lines
4.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=simplifycfg < %s | FileCheck %s
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;; Test that we correct clone debug-info when folding in
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;; FoldCondBranchOnValueKnownInPredecessorImpl. There should be two paths
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;; through this program, assigning [0 1 2 3 4 5 6 7] to the variable down
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;; one path, and [0 1 2 3 6 7] down the other.
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declare void @foo()
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declare void @bar()
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declare void @use.i1(i1)
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declare void @use.i32(i32)
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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define void @test_phi_extra_use(i1 %c) {
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; CHECK-LABEL: @test_phi_extra_use(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: if:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 0, metadata [[META7:![0-9]+]], metadata !DIExpression()), !dbg [[DBG13:![0-9]+]]
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 1, metadata [[META7]], metadata !DIExpression()), !dbg [[DBG13]]
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; CHECK-NEXT: call void @use.i1(i1 true)
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 2, metadata [[META7]], metadata !DIExpression()), !dbg [[DBG13]]
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 3, metadata [[META7]], metadata !DIExpression()), !dbg [[DBG13]]
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[JOIN2:%.*]]
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; CHECK: else:
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 0, metadata [[META7]], metadata !DIExpression()), !dbg [[DBG13]]
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 1, metadata [[META7]], metadata !DIExpression()), !dbg [[DBG13]]
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; CHECK-NEXT: call void @use.i1(i1 false)
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 2, metadata [[META7]], metadata !DIExpression()), !dbg [[DBG13]]
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 3, metadata [[META7]], metadata !DIExpression()), !dbg [[DBG13]]
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 4, metadata [[META7]], metadata !DIExpression()), !dbg [[DBG13]]
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 5, metadata [[META7]], metadata !DIExpression()), !dbg [[DBG13]]
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[JOIN2]]
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; CHECK: join2:
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 6, metadata [[META7]], metadata !DIExpression()), !dbg [[DBG13]]
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 7, metadata [[META7]], metadata !DIExpression()), !dbg [[DBG13]]
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; CHECK-NEXT: ret void, !dbg [[DBG13]]
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;
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br i1 %c, label %if, label %else
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if:
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call void @foo()
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br label %join
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else:
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call void @bar()
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br label %join
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join:
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%c2 = phi i1 [ true, %if ], [ false, %else ]
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call void @llvm.dbg.value(metadata i32 0, metadata !12, metadata !DIExpression()), !dbg !15
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call void @llvm.dbg.value(metadata i32 1, metadata !12, metadata !DIExpression()), !dbg !15
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call void @use.i1(i1 %c2)
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call void @llvm.dbg.value(metadata i32 2, metadata !12, metadata !DIExpression()), !dbg !15
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call void @llvm.dbg.value(metadata i32 3, metadata !12, metadata !DIExpression()), !dbg !15
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br i1 %c2, label %if2, label %else2
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if2:
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call void @foo()
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br label %join2
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else2:
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call void @llvm.dbg.value(metadata i32 4, metadata !12, metadata !DIExpression()), !dbg !15
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call void @llvm.dbg.value(metadata i32 5, metadata !12, metadata !DIExpression()), !dbg !15
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call void @bar()
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br label %join2
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join2:
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call void @llvm.dbg.value(metadata i32 6, metadata !12, metadata !DIExpression()), !dbg !15
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call void @llvm.dbg.value(metadata i32 7, metadata !12, metadata !DIExpression()), !dbg !15
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ret void, !dbg !15
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: ".", directory: "/foo")
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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 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang"}
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!7 = distinct !DISubprogram(name: "test1", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !10, !10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12}
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!12 = !DILocalVariable(name: "getdirt", arg: 1, scope: !7, file: !1, line: 1, type: !10)
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!15 = !DILocation(line: 1, column: 15, scope: !7)
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