c672ba7dde
With intrinsics representing debug-info, we just clone all the intrinsics when inlining a function and don't think about it any further. With non-instruction debug-info however we need to be a bit more careful and manually move the debug-info from one place to another. For the most part, this means keeping a "cursor" during block cloning of where we last copied debug-info from, and performing debug-info copying whenever we successfully clone another instruction. There are several utilities in LLVM for doing this, all of which now need to manually call cloneDebugInfo. The testing story for this is not well covered as we could rely on normal instruction-cloning mechanisms to do all the hard stuff. Thus, I've added a few tests to explicitly test dbg.value behaviours, ahead of them becoming not-instructions.
81 lines
3.6 KiB
LLVM
81 lines
3.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=jump-threading %s -o - -S | FileCheck %s
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; RUN: opt -S -passes=jump-threading %s -o - -S --try-experimental-debuginfo-iterators | FileCheck %s
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; Test that debug-info records in the Merge block, to be copied by
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; DuplicateInstructionsInSplitBetween, get duplicated into the relevant
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; parent blocks. And that ino jump-threading, the old dbg.value gets
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; deleted.
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declare void @llvm.experimental.guard(i1, ...)
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declare i32 @f1()
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declare i32 @f2()
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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define i32 @branch_implies_guard(i32 %a) !dbg !7 {
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; CHECK-LABEL: @branch_implies_guard(
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; CHECK-NEXT: [[COND:%.*]] = icmp slt i32 [[A:%.*]], 10
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; CHECK-NEXT: br i1 [[COND]], label [[T1_SPLIT:%.*]], label [[F1_SPLIT:%.*]], !dbg [[DBG12:![0-9]+]]
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; CHECK: T1.split:
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; CHECK-NEXT: [[V1:%.*]] = call i32 @f1(), !dbg [[DBG12]]
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 0, metadata [[META13:![0-9]+]], metadata !DIExpression()), !dbg [[DBG14:![0-9]+]]
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; CHECK-NEXT: [[RETVAL3:%.*]] = add i32 [[V1]], 10, !dbg [[DBG12]]
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; CHECK-NEXT: [[CONDGUARD4:%.*]] = icmp slt i32 [[A]], 20, !dbg [[DBG12]]
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; CHECK-NEXT: br label [[MERGE:%.*]]
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; CHECK: F1.split:
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; CHECK-NEXT: [[V2:%.*]] = call i32 @f2(), !dbg [[DBG12]]
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 0, metadata [[META13]], metadata !DIExpression()), !dbg [[DBG14]]
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; CHECK-NEXT: [[RETVAL1:%.*]] = add i32 [[V2]], 10, !dbg [[DBG12]]
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; CHECK-NEXT: [[CONDGUARD2:%.*]] = icmp slt i32 [[A]], 20, !dbg [[DBG12]]
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[CONDGUARD2]]) [ "deopt"() ]
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; CHECK-NEXT: br label [[MERGE]]
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; CHECK: Merge:
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; CHECK-NEXT: [[RETPHI:%.*]] = phi i32 [ [[V1]], [[T1_SPLIT]] ], [ [[V2]], [[F1_SPLIT]] ]
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; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ [[RETVAL3]], [[T1_SPLIT]] ], [ [[RETVAL1]], [[F1_SPLIT]] ]
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; CHECK-NEXT: ret i32 [[TMP1]], !dbg [[DBG12]]
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;
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%cond = icmp slt i32 %a, 10
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br i1 %cond, label %T1, label %F1, !dbg !26
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T1:
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%v1 = call i32 @f1(), !dbg !26
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br label %Merge
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F1:
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%v2 = call i32 @f2(), !dbg !26
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br label %Merge
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Merge:
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%retPhi = phi i32 [ %v1, %T1 ], [ %v2, %F1 ]
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call void @llvm.dbg.value(metadata i32 0, metadata !12, metadata !DIExpression()), !dbg !13
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%retVal = add i32 %retPhi, 10, !dbg !26
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%condGuard = icmp slt i32 %a, 20, !dbg !26
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call void(i1, ...) @llvm.experimental.guard(i1 %condGuard) [ "deopt"() ]
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ret i32 %retVal, !dbg !26
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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, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: "/tmp/out.c")
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!2 = !{}
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!3 = !{i32 7, !"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 = !{!""}
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!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !11, !11}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
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!12 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 3, type: !11)
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!13 = !DILocation(line: 0, scope: !7)
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!14 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 3, type: !11)
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!19 = distinct !DILexicalBlock(scope: !7, file: !1, line: 8, column: 7)
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!26 = !DILocation(line: 13, column: 3, scope: !7)
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