| ; RUN: llc %s -stop-after=finalize-isel -o - \ |
| ; RUN: | FileCheck %s --implicit-check-not=DBG_VALUE |
| |
| |
| ; RUN: llc --try-experimental-debuginfo-iterators %s -stop-after=finalize-isel -o - \ |
| ; RUN: | FileCheck %s --implicit-check-not=DBG_VALUE |
| |
| ;; Check that sandwiching instructions between a linked store and dbg.assign |
| ;; results in a dbg.value(prev_value) being inserted at the store, and a |
| ;; dbg.value(deref) at the dbg.assign. |
| ;; Same as use-known-value-at-early-mem-def.ll except the "early mem def" is |
| ;; for a fragment of the variable rather than the whole. |
| |
| ; CHECK: bb.0.entry: |
| ; CHECK-NEXT: DBG_VALUE %stack.0.c, $noreg, ![[var:[0-9]+]], !DIExpression(DW_OP_deref), debug-location |
| ; CHECK: MOV64mi32 %stack.0.c, 1, $noreg, 0, $noreg, 5 |
| ;; No DBG_VALUE required because the stack location is still valid. |
| |
| ; CHECK: MOV32mi %stack.0.c, 1, $noreg, 0, $noreg, 1 |
| ; CHECK-NEXT: DBG_VALUE $noreg, $noreg, ![[var]], !DIExpression(DW_OP_LLVM_fragment, 0, 32), debug-location |
| ;; This DBG_VALUE is added by the frag-agg pass because bits [32, 64) are still |
| ;; live in memory. |
| ; CHECK-NEXT: DBG_VALUE %stack.0.c, $noreg, ![[var]], !DIExpression(DW_OP_plus_uconst, 4, DW_OP_deref, DW_OP_LLVM_fragment, 32, 32) |
| |
| ;; After the call to @d there's a dbg.assign linked to the store to bits 0-32 |
| ;; that comes before it. Meaning the stack location for bits 0-32 are valid |
| ;; from here (bits 32-64 for the variable are already located in memory). |
| ; CHECK: CALL64pcrel32 @d |
| ; CHECK-NEXT: ADJCALLSTACKUP64 |
| ; CHECK-NEXT: DBG_VALUE %stack.0.c, $noreg, ![[var]], !DIExpression(DW_OP_deref), debug-location |
| |
| target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| ; Function Attrs: nounwind uwtable |
| define dso_local void @b() local_unnamed_addr #0 !dbg !7 { |
| entry: |
| %c = alloca i64, align 1, !DIAssignID !13 |
| call void @llvm.dbg.assign(metadata i1 undef, metadata !11, metadata !DIExpression(), metadata !13, metadata ptr %c, metadata !DIExpression()), !dbg !14 |
| call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %c) #4, !dbg !15 |
| store i64 5, ptr %c, align 1, !dbg !16, !DIAssignID !20 |
| call void @llvm.dbg.assign(metadata i64 5, metadata !11, metadata !DIExpression(), metadata !20, metadata ptr %c, metadata !DIExpression()), !dbg !14 |
| tail call void (...) @d() #4, !dbg !21 |
| |
| ; --- VV Hand written VV --- ; |
| store i32 1, ptr %c, align 1, !dbg !16, !DIAssignID !31 |
| ;; Check that a dbg.value(undef, frag(0, 32)) is inserted here. The value of |
| ;; the fragment is "unknown". TODO: In this case the value of the fragment is |
| ;; still obviously 5; a future improvement could be to be smarter and work |
| ;; this out. But that's a lot of work for an uncommon case. |
| tail call void (...) @d() #4, !dbg !21 |
| call void @llvm.dbg.assign(metadata i32 1, metadata !11, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 32), metadata !31, metadata ptr %c, metadata !DIExpression()), !dbg !14 |
| ; --- AA Hand written AA --- ; |
| |
| call void @a(ptr nonnull %c) #4, !dbg !22 |
| call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %c) #4, !dbg !23 |
| ret void, !dbg !23 |
| } |
| |
| declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1 |
| declare !dbg !24 dso_local void @d(...) local_unnamed_addr #2 |
| declare !dbg !27 dso_local void @a(ptr) local_unnamed_addr #2 |
| declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1 |
| declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata) #3 |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5, !1000} |
| !llvm.ident = !{!6} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None) |
| !1 = !DIFile(filename: "reduce.c", directory: "/") |
| !2 = !{} |
| !3 = !{i32 7, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 4} |
| !6 = !{!"clang version 12.0.0"} |
| !7 = distinct !DISubprogram(name: "b", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{null} |
| !10 = !{!11} |
| !11 = !DILocalVariable(name: "c", scope: !7, file: !1, line: 4, type: !12) |
| !12 = !DIBasicType(name: "char", size: 64, encoding: DW_ATE_unsigned) |
| !13 = distinct !DIAssignID() |
| !14 = !DILocation(line: 0, scope: !7) |
| !15 = !DILocation(line: 4, column: 3, scope: !7) |
| !16 = !DILocation(line: 4, column: 8, scope: !7) |
| !20 = distinct !DIAssignID() |
| !21 = !DILocation(line: 5, column: 3, scope: !7) |
| !22 = !DILocation(line: 6, column: 3, scope: !7) |
| !23 = !DILocation(line: 7, column: 1, scope: !7) |
| !24 = !DISubprogram(name: "d", scope: !1, file: !1, line: 2, type: !25, spFlags: DISPFlagOptimized, retainedNodes: !2) |
| !25 = !DISubroutineType(types: !26) |
| !26 = !{null, null} |
| !27 = !DISubprogram(name: "a", scope: !1, file: !1, line: 1, type: !28, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2) |
| !28 = !DISubroutineType(types: !29) |
| !29 = !{null, !30} |
| !30 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64) |
| !31 = distinct !DIAssignID() |
| !1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true} |