diff options
| -rw-r--r-- | llvm/lib/CodeGen/TailDuplicator.cpp | 3 | ||||
| -rw-r--r-- | llvm/test/CodeGen/X86/tail-dup-debugloc.ll | 56 |
2 files changed, 58 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/TailDuplicator.cpp b/llvm/lib/CodeGen/TailDuplicator.cpp index 7709236bbaa..d2414200e9d 100644 --- a/llvm/lib/CodeGen/TailDuplicator.cpp +++ b/llvm/lib/CodeGen/TailDuplicator.cpp @@ -725,6 +725,7 @@ bool TailDuplicator::duplicateSimpleBB( if (PredTBB == NextBB && PredFBB == nullptr) PredTBB = nullptr; + auto DL = PredBB->findBranchDebugLoc(); TII->removeBranch(*PredBB); if (!PredBB->isSuccessor(NewTarget)) @@ -735,7 +736,7 @@ bool TailDuplicator::duplicateSimpleBB( } if (PredTBB) - TII->insertBranch(*PredBB, PredTBB, PredFBB, PredCond, DebugLoc()); + TII->insertBranch(*PredBB, PredTBB, PredFBB, PredCond, DL); TDBBs.push_back(PredBB); } diff --git a/llvm/test/CodeGen/X86/tail-dup-debugloc.ll b/llvm/test/CodeGen/X86/tail-dup-debugloc.ll new file mode 100644 index 00000000000..c5ca6fc5750 --- /dev/null +++ b/llvm/test/CodeGen/X86/tail-dup-debugloc.ll @@ -0,0 +1,56 @@ +; RUN: llc -stop-after=tailduplication -march=x86-64 < %s | FileCheck %s +; +; Check that DebugLoc attached to the branch instruction of +; 'while.cond1.preheader.lr.ph' survives after tailduplication pass. +; +; CHECK: [[DLOC:![0-9]+]] = !DILocation(line: 9, column: 5, scope: !{{[0-9]+}}) +; CHECK: [[VREG:%[^ ]+]] = COPY %rdi +; CHECK: TEST64rr [[VREG]], [[VREG]] +; CHECK-NEXT: JE_1 {{.+}}, debug-location [[DLOC]] +; CHECK-NEXT: JMP_1 {{.+}}, debug-location [[DLOC]] + +target triple = "x86_64-unknown-linux-gnu" + +%struct.Node = type { %struct.Node* } + +define i32 @foo(%struct.Node* readonly %node, %struct.Node* readnone %root) !dbg !6 { +entry: + %cmp = icmp eq %struct.Node* %node, %root, !dbg !8 + br i1 %cmp, label %while.end4, label %while.cond1.preheader.lr.ph, !dbg !10 + +while.cond1.preheader.lr.ph: ; preds = %entry + %tobool = icmp eq %struct.Node* %node, null + br i1 %tobool, label %while.cond1.preheader.us.preheader, label %while.body2.preheader, !dbg !11 + +while.body2.preheader: ; preds = %while.cond1.preheader.lr.ph + br label %while.body2, !dbg !11 + +while.cond1.preheader.us.preheader: ; preds = %while.cond1.preheader.lr.ph + br label %while.cond1.preheader.us, !dbg !10 + +while.cond1.preheader.us: ; preds = %while.cond1.preheader.us.preheader, %while.cond1.preheader.us + br label %while.cond1.preheader.us, !dbg !10 + +while.body2: ; preds = %while.body2.preheader, %while.body2 + br label %while.body2, !dbg !11 + +while.end4: ; preds = %entry + ret i32 0, !dbg !12 +} + +!llvm.dbg.cu = !{!0} +!llvm.module.flags = !{!3, !4} + +!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: true, emissionKind: LineTablesOnly) +!1 = !DIFile(filename: "foo.c", directory: "b/") +!2 = !{} +!3 = !{i32 2, !"Dwarf Version", i32 4} +!4 = !{i32 2, !"Debug Info Version", i32 3} +!5 = !{} +!6 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 5, type: !7, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !2) +!7 = !DISubroutineType(types: !2) +!8 = !DILocation(line: 7, column: 15, scope: !9) +!9 = !DILexicalBlockFile(scope: !6, file: !1, discriminator: 2) +!10 = !DILocation(line: 7, column: 3, scope: !9) +!11 = !DILocation(line: 9, column: 5, scope: !9) +!12 = !DILocation(line: 14, column: 3, scope: !6) |
