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1; RUN: llc < %s -stop-after=virtregrewriter -o - | FileCheck %s2;3; NVPTX produces a different order of the BBs4; XFAIL: target=nvptx{{.*}}5; Both RISC-V and AMDGPU(GCN) deploy two VirtRegRewriter in their codegen6; pipeline. This test prematurely stops at the first one, which doesn't cleanup7; the virtual register map and cause an assertion failure. Ideally we can solve8; this by teaching `-stop-after` how to stop at the last instance of a Pass,9; but we're just marking XFAIL for these two targets for now.10; XFAIL: target=riscv{{.*}}11; XFAIL: target=amdgcn-{{.*}}12 13; Generated with "clang++ -g -O1 -S -emit-llvm"14;15; inline bool bar(char c) {16; return c >= '0' && c <= '9';17; }18;19; unsigned foo(const char* data,20; int length,21; int* parsing_result) {22; unsigned value = 0;23; int result = 1;24; bool overflow = 0;25;26; while (bar(*data)) {27; if (value > 1) {28; result = 2;29; overflow = 1;30; }31;32; if (!overflow)33; value = value + 1;34; }35;36; if (length == 0 || value) {37; if (!overflow)38; result = 0;39; } else {40; result = 1;41; }42; bye:43; *parsing_result = result;44; return result == 0 ? value : 0;45; }46;47; CHECK: {{^body:}}48; CHECK: bye.thread21:49; CHECK: DBG_LABEL !1450; CHECK: if.then5:51; CHECK: DBG_LABEL !1452; CHECK-NOT: DBG_LABEL !1453 54$_Z3barc = comdat any55 56; Function Attrs: nounwind uwtable57define dso_local i32 @_Z3fooPKciPi(ptr nocapture readonly %data, i32 %length, ptr nocapture %parsing_result) local_unnamed_addr !dbg !4 {58entry:59 %0 = load i8, ptr %data, align 160 %call23 = tail call zeroext i1 @_Z3barc(i8 signext %0), !dbg !1561 br i1 %call23, label %while.body, label %while.end62 63while.body: ; preds = %entry, %while.body64 %overflow.026 = phi i8 [ %spec.select18, %while.body ], [ 0, %entry ]65 %result.025 = phi i32 [ %spec.select, %while.body ], [ 1, %entry ]66 %value.024 = phi i32 [ %value.1, %while.body ], [ 0, %entry ]67 %cmp = icmp ugt i32 %value.024, 168 %spec.select = select i1 %cmp, i32 2, i32 %result.02569 %spec.select18 = select i1 %cmp, i8 1, i8 %overflow.02670 %1 = and i8 %spec.select18, 171 %2 = xor i8 %1, 172 %3 = zext i8 %2 to i3273 %value.1 = add i32 %value.024, %374 %4 = load i8, ptr %data, align 175 %call = tail call zeroext i1 @_Z3barc(i8 signext %4), !dbg !1576 br i1 %call, label %while.body, label %while.end.loopexit77 78while.end.loopexit: ; preds = %while.body79 %phitmp = and i8 %spec.select18, 180 br label %while.end81 82while.end: ; preds = %while.end.loopexit, %entry83 %value.0.lcssa = phi i32 [ 0, %entry ], [ %value.1, %while.end.loopexit ]84 %result.0.lcssa = phi i32 [ 1, %entry ], [ %spec.select, %while.end.loopexit ]85 %overflow.0.lcssa = phi i8 [ 0, %entry ], [ %phitmp, %while.end.loopexit ]86 %cmp3 = icmp eq i32 %length, 087 %tobool4 = icmp ne i32 %value.0.lcssa, 088 %or.cond = or i1 %cmp3, %tobool489 br i1 %or.cond, label %if.then5, label %bye.thread2190 91bye.thread21: ; preds = %while.end92 call void @llvm.dbg.label(metadata !14), !dbg !1693 store i32 1, ptr %parsing_result, align 494 br label %695 96if.then5: ; preds = %while.end97 %tobool6 = icmp eq i8 %overflow.0.lcssa, 098 call void @llvm.dbg.label(metadata !14), !dbg !1699 call void @llvm.dbg.label(metadata !14), !dbg !16100 br i1 %tobool6, label %bye.thread, label %bye101 102bye.thread: ; preds = %if.then5103 store i32 0, ptr %parsing_result, align 4104 br label %5105 106bye: ; preds = %if.then5107 store i32 %result.0.lcssa, ptr %parsing_result, align 4108 %cmp10 = icmp eq i32 %result.0.lcssa, 0109 br i1 %cmp10, label %5, label %6110 111; <label>:5: ; preds = %bye.thread, %bye112 br label %6113 114; <label>:6: ; preds = %bye.thread21, %bye, %5115 %7 = phi i32 [ %value.0.lcssa, %5 ], [ 0, %bye ], [ 0, %bye.thread21 ]116 ret i32 %7117}118 119; Function Attrs: inlinehint nounwind uwtable120define linkonce_odr dso_local zeroext i1 @_Z3barc(i8 signext %c) local_unnamed_addr comdat {121entry:122 %c.off = add i8 %c, -48123 %0 = icmp ult i8 %c.off, 10124 ret i1 %0125}126 127; Function Attrs: nounwind readnone speculatable128declare void @llvm.dbg.label(metadata) #0129 130attributes #0 = { nounwind readnone speculatable }131 132!llvm.dbg.cu = !{!0}133!llvm.module.flags = !{!3}134 135!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)136!1 = !DIFile(filename: "live-debug-label.cc", directory: ".")137!2 = !{}138!3 = !{i32 2, !"Debug Info Version", i32 3}139!4 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooPKciPi", scope: !1, file: !1, line: 5, type: !5, isLocal: false, isDefinition: true, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !13)140!5 = !DISubroutineType(types: !6)141!6 = !{!7, !8, !11, !12}142!7 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)143!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64)144!9 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !10)145!10 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)146!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)147!12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64)148!13 = !{!14}149!14 = !DILabel(scope: !4, name: "bye", file: !1, line: 28)150!15 = !DILocation(line: 12, column: 10, scope: !4)151!16 = !DILocation(line: 28, column: 1, scope: !4)152