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1; RUN: llc -O0 < %s | FileCheck %s2target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"3target triple = "x86_64-apple-macosx10.6.7"4 5;CHECK-LABEL: foo:6;CHECK: .loc 1 2 11 prologue_end7define i32 @foo(i32 %i) nounwind ssp !dbg !1 {8entry:9 %i.addr = alloca i32, align 410 %j = alloca i32, align 411 store i32 %i, ptr %i.addr, align 412 call void @llvm.dbg.declare(metadata ptr %i.addr, metadata !7, metadata !DIExpression()), !dbg !813 call void @llvm.dbg.declare(metadata ptr %j, metadata !9, metadata !DIExpression()), !dbg !1114 store i32 2, ptr %j, align 4, !dbg !1215 %tmp = load i32, ptr %j, align 4, !dbg !1316 %inc = add nsw i32 %tmp, 1, !dbg !1317 store i32 %inc, ptr %j, align 4, !dbg !1318 %tmp1 = load i32, ptr %j, align 4, !dbg !1419 %tmp2 = load i32, ptr %i.addr, align 4, !dbg !1420 %add = add nsw i32 %tmp1, %tmp2, !dbg !1421 store i32 %add, ptr %j, align 4, !dbg !1422 %tmp3 = load i32, ptr %j, align 4, !dbg !1523 ret i32 %tmp3, !dbg !1524}25 26declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone27 28;CHECK-LABEL: main:29;CHECK: .loc 1 8 2 prologue_end30 31define i32 @main() nounwind ssp !dbg !6 {32entry:33 %retval = alloca i32, align 434 store i32 0, ptr %retval, !dbg !2235 %call = call i32 @foo(i32 21), !dbg !1636 ret i32 %call, !dbg !1637}38 39;; int foo(int arg) {40;; while (arg)41;; arg--;42;; return 0;43;; }44;;45;; In this function, the entry block will fall through to while.cond, with no46;; instructions having source-locations. The expectations at -O0 is that we'll47;; put prologue_end on the first instruction of the loop, after %arg.addr is48;; initialized.49 50; CHECK: _bar:51; CHECK-NEXT: Lfunc_begin2:52; CHECK-NEXT: .loc 1 11 0 is_stmt 153; CHECK-NEXT: .cfi_startproc54; CHECK-NEXT: ## %bb.0:55; CHECK-NEXT: movl %edi, -4(%rsp)56; CHECK-NEXT: LBB2_1:57; CHECK-NEXT: ## =>This Inner Loop Header: Depth=158; CHECK-NEXT: Ltmp4:59; CHECK-NEXT: .loc 1 12 3 prologue_end60; CHECK-NEXT: cmpl $0, -4(%rsp)61 62define dso_local i32 @bar(i32 noundef %arg) !dbg !30 {63entry:64 %arg.addr = alloca i32, align 465 store i32 %arg, ptr %arg.addr, align 466 br label %while.cond, !dbg !3767 68while.cond: ; preds = %while.body, %entry69 %0 = load i32, ptr %arg.addr, align 4, !dbg !3870 %tobool = icmp ne i32 %0, 0, !dbg !3771 br i1 %tobool, label %while.body, label %while.end, !dbg !3772 73while.body: ; preds = %while.cond74 %1 = load i32, ptr %arg.addr, align 4, !dbg !3975 %dec = add nsw i32 %1, -1, !dbg !3976 store i32 %dec, ptr %arg.addr, align 4, !dbg !3977 br label %while.cond, !dbg !3778 79while.end: ; preds = %while.cond80 ret i32 0, !dbg !4281}82 83!llvm.dbg.cu = !{!0}84!llvm.module.flags = !{!21}85!18 = !{!1, !6}86 87!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.0 (trunk 131100)", isOptimized: false, emissionKind: FullDebug, file: !19, enums: !20, retainedTypes: !20, imports: null)88!1 = distinct !DISubprogram(name: "foo", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 1, file: !19, scope: !2, type: !3)89!2 = !DIFile(filename: "/tmp/a.c", directory: "/private/tmp")90!3 = !DISubroutineType(types: !4)91!4 = !{!5}92!5 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)93!6 = distinct !DISubprogram(name: "main", line: 7, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !0, scopeLine: 7, file: !19, scope: !2, type: !3)94!7 = !DILocalVariable(name: "i", line: 1, arg: 1, scope: !1, file: !2, type: !5)95!8 = !DILocation(line: 1, column: 13, scope: !1)96!9 = !DILocalVariable(name: "j", line: 2, scope: !10, file: !2, type: !5)97!10 = distinct !DILexicalBlock(line: 1, column: 16, file: !19, scope: !1)98!11 = !DILocation(line: 2, column: 6, scope: !10)99!12 = !DILocation(line: 2, column: 11, scope: !10)100!13 = !DILocation(line: 3, column: 2, scope: !10)101!14 = !DILocation(line: 4, column: 2, scope: !10)102!15 = !DILocation(line: 5, column: 2, scope: !10)103!16 = !DILocation(line: 8, column: 2, scope: !17)104!17 = distinct !DILexicalBlock(line: 7, column: 12, file: !19, scope: !6)105!19 = !DIFile(filename: "/tmp/a.c", directory: "/private/tmp")106!20 = !{}107!21 = !{i32 1, !"Debug Info Version", i32 3}108!22 = !DILocation(line: 0, column: 0, scope: !17)109!30 = distinct !DISubprogram(name: "bar", scope: !2, file: !2, line: 10, type: !3, scopeLine: 11, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !34)110!34 = !{}111!36 = !DILocation(line: 11, column: 13, scope: !30)112!37 = !DILocation(line: 12, column: 3, scope: !30)113!38 = !DILocation(line: 12, column: 10, scope: !30)114!39 = !DILocation(line: 13, column: 8, scope: !30)115!42 = !DILocation(line: 14, column: 3, scope: !30)116