| ; RUN: opt -S -licm %s | FileCheck %s |
| ; |
| ; LICM should null out debug locations when it hoists instructions out of a loop. |
| ; |
| ; Generated with |
| ; clang -O0 -S -emit-llvm test.cpp -g -gline-tables-only -o t.ll |
| ; opt -S -sroa -adce -simplifycfg -reassociate -domtree -loops \ |
| ; -loop-simplify -lcssa -basic-aa -aa -scalar-evolution -loop-rotate t.ll > test.ll |
| ; |
| ; void bar(int *); |
| ; void foo(int k, int p) |
| ; { |
| ; for (int i = 0; i < k; i++) { |
| ; bar(&p + 4); |
| ; } |
| ; } |
| ; |
| ; We make sure that the instruction that is hoisted into the preheader |
| ; does not have a debug location. |
| ; CHECK: for.body.lr.ph: |
| ; CHECK: getelementptr{{.*}}%p.addr, i64 4{{$}} |
| ; CHECK: for.body: |
| ; |
| ; ModuleID = 't.ll' |
| source_filename = "test.c" |
| |
| ; Function Attrs: nounwind sspstrong uwtable |
| define void @foo(i32 %k, i32 %p) !dbg !7 { |
| entry: |
| %p.addr = alloca i32, align 4 |
| store i32 %p, i32* %p.addr, align 4 |
| %cmp2 = icmp slt i32 0, %k, !dbg !9 |
| br i1 %cmp2, label %for.body.lr.ph, label %for.end, !dbg !9 |
| |
| for.body.lr.ph: ; preds = %entry |
| br label %for.body, !dbg !9 |
| |
| for.body: ; preds = %for.body.lr.ph, %for.body |
| %i.03 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ] |
| %add.ptr = getelementptr inbounds i32, i32* %p.addr, i64 4, !dbg !11 |
| call void @bar(i32* %add.ptr), !dbg !11 |
| %inc = add nsw i32 %i.03, 1, !dbg !12 |
| %cmp = icmp slt i32 %inc, %k, !dbg !9 |
| br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !dbg !9, !llvm.loop !14 |
| |
| for.cond.for.end_crit_edge: ; preds = %for.body |
| br label %for.end, !dbg !9 |
| |
| for.end: ; preds = %for.cond.for.end_crit_edge, %entry |
| ret void, !dbg !16 |
| } |
| |
| declare void @bar(i32*) |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5} |
| !llvm.ident = !{!6} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.1 (PS4 clang version 4.50.0.249 7e7cd823 checking)", isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2) |
| !1 = !DIFile(filename: "test.c", directory: "D:\test") |
| !2 = !{} |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"PIC Level", i32 2} |
| !6 = !{!"clang version 3.9.1 (PS4 clang version 4.50.0.249 7e7cd823 checking)"} |
| !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) |
| !8 = !DISubroutineType(types: !2) |
| !9 = !DILocation(line: 4, scope: !10) |
| !10 = !DILexicalBlockFile(scope: !7, file: !1, discriminator: 1) |
| !11 = !DILocation(line: 5, scope: !7) |
| !12 = !DILocation(line: 4, scope: !13) |
| !13 = !DILexicalBlockFile(scope: !7, file: !1, discriminator: 2) |
| !14 = distinct !{!14, !15} |
| !15 = !DILocation(line: 4, scope: !7) |
| !16 = !DILocation(line: 7, scope: !7) |