diff options
Diffstat (limited to 'llvm/test/Transforms/LoopSimplify/do-preheader-dbg.ll')
| -rwxr-xr-x | llvm/test/Transforms/LoopSimplify/do-preheader-dbg.ll | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopSimplify/do-preheader-dbg.ll b/llvm/test/Transforms/LoopSimplify/do-preheader-dbg.ll new file mode 100755 index 00000000000..7cacc49cd80 --- /dev/null +++ b/llvm/test/Transforms/LoopSimplify/do-preheader-dbg.ll @@ -0,0 +1,122 @@ +; Confirm that the line number for the do.body.preheader block +; branch is the the start of the loop. + +; RUN: opt -simplifycfg -loop-simplify -keep-loops="false" -S <%s | FileCheck %s + +; CHECK: do.body.preheader: +; CHECK-NEXT: phi +; CHECK-NEXT: phi +; CHECK-NEXT: br label %do.body, !dbg ![[DL:[0-9]+]] +; CHECK: ![[DL]] = !DILocation(line: 4, + +; This IR can be generated by running: +; clang src.cpp -O2 -g -S -emit-llvm -mllvm -opt-bisect-limit=62 -o - +; +; Where src.cpp contains: +; int foo(char *Bytes, int Count) +; { +; int Total = 0; +; do +; Total += Bytes[--Count]; +; while (Count); +; return Total; +; } + +define dso_local i32 @"foo"(i8* nocapture readonly %Bytes, i32 %Count) local_unnamed_addr !dbg !8 { +entry: + %0 = sext i32 %Count to i64, !dbg !10 + %min.iters.check = icmp ult i32 %Count, 8, !dbg !10 + br i1 %min.iters.check, label %do.body.preheader, label %vector.ph, !dbg !10 + +vector.ph: ; preds = %entry + %n.vec = and i64 %0, -8, !dbg !10 + %ind.end = sub nsw i64 %0, %n.vec, !dbg !10 + br label %vector.body, !dbg !10 + +vector.body: ; preds = %vector.body, %vector.ph + %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ] + %vec.phi = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %11, %vector.body ] + %vec.phi5 = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %12, %vector.body ] + %1 = xor i64 %index, -1, !dbg !11 + %2 = add i64 %1, %0, !dbg !11 + %3 = getelementptr inbounds i8, i8* %Bytes, i64 %2, !dbg !11 + %4 = getelementptr inbounds i8, i8* %3, i64 -3, !dbg !11 + %5 = bitcast i8* %4 to <4 x i8>*, !dbg !11 + %wide.load = load <4 x i8>, <4 x i8>* %5, align 1, !dbg !11, !tbaa !12 + %reverse = shufflevector <4 x i8> %wide.load, <4 x i8> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>, !dbg !11 + %6 = getelementptr inbounds i8, i8* %3, i64 -4, !dbg !11 + %7 = getelementptr inbounds i8, i8* %6, i64 -3, !dbg !11 + %8 = bitcast i8* %7 to <4 x i8>*, !dbg !11 + %wide.load6 = load <4 x i8>, <4 x i8>* %8, align 1, !dbg !11, !tbaa !12 + %reverse7 = shufflevector <4 x i8> %wide.load6, <4 x i8> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>, !dbg !11 + %9 = sext <4 x i8> %reverse to <4 x i32>, !dbg !11 + %10 = sext <4 x i8> %reverse7 to <4 x i32>, !dbg !11 + %11 = add nsw <4 x i32> %vec.phi, %9, !dbg !11 + %12 = add nsw <4 x i32> %vec.phi5, %10, !dbg !11 + %index.next = add i64 %index, 8 + %13 = icmp eq i64 %index.next, %n.vec + br i1 %13, label %middle.block, label %vector.body, !llvm.loop !15 + +middle.block: ; preds = %vector.body + %.lcssa12 = phi <4 x i32> [ %11, %vector.body ], !dbg !11 + %.lcssa = phi <4 x i32> [ %12, %vector.body ], !dbg !11 + %bin.rdx = add <4 x i32> %.lcssa, %.lcssa12, !dbg !11 + %rdx.shuf = shufflevector <4 x i32> %bin.rdx, <4 x i32> undef, <4 x i32> <i32 2, i32 3, i32 undef, i32 undef>, !dbg !11 + %bin.rdx8 = add <4 x i32> %bin.rdx, %rdx.shuf, !dbg !11 + %rdx.shuf9 = shufflevector <4 x i32> %bin.rdx8, <4 x i32> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef>, !dbg !11 + %bin.rdx10 = add <4 x i32> %bin.rdx8, %rdx.shuf9, !dbg !11 + %14 = extractelement <4 x i32> %bin.rdx10, i32 0, !dbg !11 + %cmp.n = icmp eq i64 %n.vec, %0 + br i1 %cmp.n, label %do.end, label %do.body.preheader, !dbg !10 + +do.body.preheader: ; preds = %middle.block, %entry + %indvars.iv.ph = phi i64 [ %0, %entry ], [ %ind.end, %middle.block ] + %Total.0.ph = phi i32 [ 0, %entry ], [ %14, %middle.block ] + br label %do.body, !dbg !11 + +do.body: ; preds = %do.body.preheader, %do.body + %indvars.iv = phi i64 [ %indvars.iv.next, %do.body ], [ %indvars.iv.ph, %do.body.preheader ] + %Total.0 = phi i32 [ %add, %do.body ], [ %Total.0.ph, %do.body.preheader ], !dbg !18 + %indvars.iv.next = add nsw i64 %indvars.iv, -1, !dbg !11 + %arrayidx = getelementptr inbounds i8, i8* %Bytes, i64 %indvars.iv.next, !dbg !11 + %15 = load i8, i8* %arrayidx, align 1, !dbg !11, !tbaa !12 + %conv = sext i8 %15 to i32, !dbg !11 + %add = add nsw i32 %Total.0, %conv, !dbg !11 + %16 = icmp eq i64 %indvars.iv.next, 0 + br i1 %16, label %do.end.loopexit, label %do.body, !dbg !11, !llvm.loop !19 + +do.end.loopexit: ; preds = %do.body + %add.lcssa11 = phi i32 [ %add, %do.body ], !dbg !11 + br label %do.end, !dbg !21 + +do.end: ; preds = %do.end.loopexit, %middle.block + %add.lcssa = phi i32 [ %14, %middle.block ], [ %add.lcssa11, %do.end.loopexit ], !dbg !11 + ret i32 %add.lcssa, !dbg !21 +} + +!llvm.dbg.cu = !{!0} +!llvm.module.flags = !{!3, !4, !5, !6} +!llvm.ident = !{!7} + +!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2, nameTableKind: None) +!1 = !DIFile(filename: "src2.cpp", directory: "") +!2 = !{} +!3 = !{i32 2, !"CodeView", i32 1} +!4 = !{i32 2, !"Debug Info Version", i32 3} +!5 = !{i32 1, !"wchar_size", i32 2} +!6 = !{i32 7, !"PIC Level", i32 2} +!7 = !{!""} +!8 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !9, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2) +!9 = !DISubroutineType(types: !2) +!10 = !DILocation(line: 4, scope: !8) +!11 = !DILocation(line: 5, scope: !8) +!12 = !{!13, !13, i64 0} +!13 = !{!"omnipotent char", !14, i64 0} +!14 = !{!"Simple C++ TBAA"} +!15 = distinct !{!15, !10, !16, !17} +!16 = !DILocation(line: 6, scope: !8) +!17 = !{!"llvm.loop.isvectorized", i32 1} +!18 = !DILocation(line: 0, scope: !8) +!19 = distinct !{!19, !10, !16, !20, !17} +!20 = !{!"llvm.loop.unroll.runtime.disable"} +!21 = !DILocation(line: 7, scope: !8) |
