1; RUN: llc -O2 %s -o - -mtriple=x86_64-unknown-linux-gnu | FileCheck %s --check-prefix=OPTS 2; RUN: llc -O0 %s -o - -mtriple=x86_64-unknown-linux-gnu | FileCheck %s --check-prefix=UNOPT 3 4;; Test that, even though there are no source locations attached to the foo 5;; function, we still give it the start-of-function source location of the 6;; definition line. Otherwise, this function would have no entry in the 7;; line table at all. 8 9; OPTS-LABEL: foo: 10; OPTS-NEXT: .Lfunc_begin0: 11; OPTS-NEXT: .file 0 "." "foobar.c" 12; OPTS-NEXT: .cfi_startproc 13; OPTS-NEXT: # %bb.0: 14; OPTS-NEXT: .loc 0 1 0 prologue_end 15; OPTS-LABEL: bar: 16 17define dso_local noundef i32 @foo(ptr nocapture noundef writeonly %bar) local_unnamed_addr !dbg !10 { 18entry: 19 store i32 0, ptr %bar, align 4 20 ret i32 0 21} 22 23;; In a function with no source location, but multiple blocks, there will be 24;; an opening scope-line. Test for this behaviour, and preserve the 25;; unconditional branch by compiling -O0. 26 27; UNOPT-LABEL: bar: 28; UNOPT-NEXT: .Lfunc_begin1: 29; UNOPT-NEXT: .cfi_startproc 30; UNOPT-LABEL: %bb.0: 31; UNOPT-NEXT: .loc 0 11 0 prologue_end 32; UNOPT-NEXT: movq %rdi, -8(%rsp) 33; UNOPT-NEXT: jmp .LBB1_1 34; UNOPT-LABEL: .LBB1_1: 35; UNOPT-NEXT: movq -8(%rsp), %rax 36 37define dso_local noundef i32 @bar(ptr nocapture noundef writeonly %baz) local_unnamed_addr !dbg !20 { 38entry: 39 br label %bb1 40bb1: 41 store i32 0, ptr %baz, align 4 42 ret i32 0 43} 44 45!llvm.dbg.cu = !{!0} 46!llvm.module.flags = !{!2, !3} 47!llvm.ident = !{!9} 48 49!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None) 50!1 = !DIFile(filename: "foobar.c", directory: ".") 51!2 = !{i32 7, !"Dwarf Version", i32 5} 52!3 = !{i32 2, !"Debug Info Version", i32 3} 53!9 = !{!"clang"} 54!10 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !11, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !15) 55!11 = !DISubroutineType(types: !12) 56!12 = !{!13, !14} 57!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 58!14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64) 59!15 = !{!16} 60!16 = !DILocalVariable(name: "bar", arg: 1, scope: !10, file: !1, line: 1, type: !14) 61!17 = !DILocation(line: 0, scope: !10) 62!18 = !DILocation(line: 2, column: 8, scope: !10) 63!20 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 11, type: !11, scopeLine: 11, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !25) 64!25 = !{!26} 65!26 = !DILocalVariable(name: "bar", arg: 1, scope: !20, file: !1, line: 11, type: !14) 66!27 = !DILocation(line: 0, scope: !20) 67!28 = !DILocation(line: 12, column: 8, scope: !20) 68 69