1; RUN: llc -mtriple=x86_64-apple-darwin -filetype=obj < %s -o %t.o 2; RUN: llvm-dwarfdump %t.o | FileCheck %s -implicit-check-not=DW_TAG_subprogram 3; RUN: llvm-dwarfdump --verify %t.o 4 5; This test checks that cross-CU references within call site tags to subprogram 6; definitions are well-formed. There are 5 cases checked in this test. Each set 7; of checks is numbered and has a brief summary. 8 9; Instructions to regenerate the IR: 10; clang -O1 -g -emit-llvm -o a.bc -c a.c 11; clang -O1 -g -emit-llvm -o b.bc -c b.c 12; llvm-link -o linked.bc a.bc b.bc 13; opt -O1 linked.bc -o merged.bc 14 15; Source: 16; // a.c 17; __attribute__((optnone)) void noinline_func_in_a() {} 18; 19; __attribute__((optnone)) static void foo() {} 20; __attribute__((always_inline)) void always_inline_helper_in_a_that_calls_foo() { 21; foo(); 22; } 23; 24; extern void func_from_b(); 25; void call_func_in_b_from_a() { 26; func_from_b(); 27; } 28; 29; // b.c 30; extern void noinline_func_in_a(); 31; void call_noinline_func_in_a_from_b() { 32; noinline_func_in_a(); 33; } 34; 35; __attribute__((optnone)) void foo() {} 36; extern void always_inline_helper_in_a_that_calls_foo(); 37; void call_both_foos_from_b() { 38; foo(); 39; always_inline_helper_in_a_that_calls_foo(); 40; } 41; 42; __attribute__((optnone)) void func_from_b() {} 43; void call_func_in_b_from_b() { 44; func_from_b(); 45; } 46 47; === CU for a.c === 48 49; CHECK: DW_TAG_compile_unit 50; CHECK: DW_AT_name ("a.c") 51 52; CHECK: 0x{{0+}}[[NOINLINE_FUNC_IN_A:.*]]: DW_TAG_subprogram 53; CHECK: DW_AT_name ("noinline_func_in_a") 54 55; 1) Check that "always_inline_helper_in_a_that_calls_foo" calls the "foo" in 56; a.c, and *not* the "foo" in b.c. 57; CHECK: 0x{{0+}}[[ALWAYS_INLINE_HELPER_IN_A:.*]]: DW_TAG_subprogram 58; CHECK: DW_AT_abstract_origin ({{.*}} "always_inline_helper_in_a_that_calls_foo") 59; CHECK: DW_TAG_call_site 60; CHECK-NEXT: DW_AT_call_origin (0x{{0+}}[[FOO_IN_A:.*]]) 61 62; CHECK: 0x{{0+}}[[FOO_IN_A]]: DW_TAG_subprogram 63; CHECK: DW_AT_name ("foo") 64 65; 2) Check that "call_func_in_b_from_a" has a cross-CU ref into b.c. 66; CHECK: DW_TAG_subprogram 67; CHECK: DW_AT_name ("call_func_in_b_from_a") 68; CHECK: DW_TAG_call_site 69; CHECK-NEXT: DW_AT_call_origin (0x{{0+}}[[FUNC_FROM_B:.*]]) 70 71; CHECK: DW_TAG_subprogram 72; CHECK: DW_AT_name ("always_inline_helper_in_a_that_calls_foo") 73; CHECK: DW_AT_inline (DW_INL_inlined) 74 75; === CU for b.c === 76 77; CHECK: DW_TAG_compile_unit 78; CHECK: DW_AT_name ("b.c") 79 80; 3) Validate the cross-CU ref from "call_func_in_b_from_a" in a.c. 81; CHECK: 0x{{0+}}[[FUNC_FROM_B]]: DW_TAG_subprogram 82; CHECK: DW_AT_name ("func_from_b") 83 84; 4) Validate the cross-CU ref from "call_noinline_func_in_a_from_b" in b.c. 85; CHECK: DW_TAG_subprogram 86; CHECK: DW_AT_name ("call_noinline_func_in_a_from_b") 87; CHECK: DW_TAG_call_site 88; CHECK-NEXT: DW_AT_call_origin (0x{{0+}}[[NOINLINE_FUNC_IN_A]]) 89 90; CHECK: 0x{{0+}}[[FOO_IN_B:.*]]: DW_TAG_subprogram 91; CHECK: DW_AT_name ("foo") 92 93; 5) Validate that we correctly emit a cross-CU ref when the call is inlined 94; from another CU. 95; CHECK: DW_TAG_subprogram 96; CHECK: DW_AT_name ("call_both_foos_from_b") 97; CHECK: DW_TAG_call_site 98; CHECK-NEXT: DW_AT_call_origin (0x{{0+}}[[FOO_IN_B]]) 99; CHECK: DW_TAG_call_site 100; CHECK-NEXT: DW_AT_call_origin (0x{{0+}}[[FOO_IN_A]]) 101 102; CHECK: DW_TAG_subprogram 103; CHECK: DW_AT_name ("call_func_in_b_from_b") 104; CHECK: DW_TAG_call_site 105; CHECK-NEXT: DW_AT_call_origin (0x{{0+}}[[FUNC_FROM_B]]) 106 107target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 108target triple = "x86_64-apple-macosx10.14.0" 109 110define void @noinline_func_in_a() local_unnamed_addr #0 !dbg !17 { 111entry: 112 ret void, !dbg !20 113} 114 115define void @always_inline_helper_in_a_that_calls_foo() local_unnamed_addr #1 !dbg !21 { 116entry: 117 tail call fastcc void @foo.2(), !dbg !22 118 ret void, !dbg !23 119} 120 121define internal fastcc void @foo.2() unnamed_addr #0 !dbg !24 { 122entry: 123 ret void, !dbg !25 124} 125 126define void @call_func_in_b_from_a() local_unnamed_addr !dbg !26 { 127entry: 128 tail call void @func_from_b() #3, !dbg !27 129 ret void, !dbg !28 130} 131 132define void @call_noinline_func_in_a_from_b() local_unnamed_addr !dbg !29 { 133entry: 134 tail call void @noinline_func_in_a() #3, !dbg !30 135 ret void, !dbg !31 136} 137 138define void @foo() local_unnamed_addr #0 !dbg !32 { 139entry: 140 ret void, !dbg !33 141} 142 143define void @call_both_foos_from_b() local_unnamed_addr !dbg !34 { 144entry: 145 tail call void @foo(), !dbg !35 146 tail call fastcc void @foo.2() #3, !dbg !36 147 ret void, !dbg !38 148} 149 150define void @func_from_b() local_unnamed_addr #0 !dbg !39 { 151entry: 152 ret void, !dbg !40 153} 154 155define void @call_func_in_b_from_b() local_unnamed_addr !dbg !41 { 156entry: 157 tail call void @func_from_b(), !dbg !42 158 ret void, !dbg !43 159} 160 161attributes #0 = { noinline } 162attributes #1 = { alwaysinline } 163 164!llvm.dbg.cu = !{!0, !7} 165!llvm.ident = !{!12, !12} 166!llvm.module.flags = !{!13, !14, !15, !16} 167 168!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (git@github.com:llvm/llvm-project.git 310e85309f870ee7347ef979d7d8da9bf28e92ea)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None) 169!1 = !DIFile(filename: "a.c", directory: "/Users/vsk/tmp/lto-entry-vals") 170!2 = !{} 171!3 = !{!4} 172!4 = !DISubprogram(name: "func_from_b", scope: !1, file: !1, line: 8, type: !5, spFlags: DISPFlagOptimized, retainedNodes: !2) 173!5 = !DISubroutineType(types: !6) 174!6 = !{null, null} 175!7 = distinct !DICompileUnit(language: DW_LANG_C99, file: !8, producer: "clang version 10.0.0 (git@github.com:llvm/llvm-project.git 310e85309f870ee7347ef979d7d8da9bf28e92ea)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !9, nameTableKind: None) 176!8 = !DIFile(filename: "b.c", directory: "/Users/vsk/tmp/lto-entry-vals") 177!9 = !{!10, !11} 178!10 = !DISubprogram(name: "noinline_func_in_a", scope: !8, file: !8, line: 1, type: !5, spFlags: DISPFlagOptimized, retainedNodes: !2) 179!11 = !DISubprogram(name: "always_inline_helper_in_a_that_calls_foo", scope: !8, file: !8, line: 7, type: !5, spFlags: DISPFlagOptimized, retainedNodes: !2) 180!12 = !{!"clang version 10.0.0 (git@github.com:llvm/llvm-project.git 310e85309f870ee7347ef979d7d8da9bf28e92ea)"} 181!13 = !{i32 7, !"Dwarf Version", i32 4} 182!14 = !{i32 2, !"Debug Info Version", i32 3} 183!15 = !{i32 1, !"wchar_size", i32 4} 184!16 = !{i32 7, !"PIC Level", i32 2} 185!17 = distinct !DISubprogram(name: "noinline_func_in_a", scope: !1, file: !1, line: 1, type: !18, scopeLine: 1, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2) 186!18 = !DISubroutineType(types: !19) 187!19 = !{null} 188!20 = !DILocation(line: 1, column: 53, scope: !17) 189!21 = distinct !DISubprogram(name: "always_inline_helper_in_a_that_calls_foo", scope: !1, file: !1, line: 4, type: !18, scopeLine: 4, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2) 190!22 = !DILocation(line: 5, column: 3, scope: !21) 191!23 = !DILocation(line: 6, column: 1, scope: !21) 192!24 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !18, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2) 193!25 = !DILocation(line: 3, column: 45, scope: !24) 194!26 = distinct !DISubprogram(name: "call_func_in_b_from_a", scope: !1, file: !1, line: 9, type: !18, scopeLine: 9, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2) 195!27 = !DILocation(line: 10, column: 3, scope: !26) 196!28 = !DILocation(line: 11, column: 1, scope: !26) 197!29 = distinct !DISubprogram(name: "call_noinline_func_in_a_from_b", scope: !8, file: !8, line: 2, type: !18, scopeLine: 2, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !7, retainedNodes: !2) 198!30 = !DILocation(line: 3, column: 3, scope: !29) 199!31 = !DILocation(line: 4, column: 1, scope: !29) 200!32 = distinct !DISubprogram(name: "foo", scope: !8, file: !8, line: 6, type: !18, scopeLine: 6, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !7, retainedNodes: !2) 201!33 = !DILocation(line: 6, column: 38, scope: !32) 202!34 = distinct !DISubprogram(name: "call_both_foos_from_b", scope: !8, file: !8, line: 8, type: !18, scopeLine: 8, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !7, retainedNodes: !2) 203!35 = !DILocation(line: 9, column: 3, scope: !34) 204!36 = !DILocation(line: 5, column: 3, scope: !21, inlinedAt: !37) 205!37 = distinct !DILocation(line: 10, column: 3, scope: !34) 206!38 = !DILocation(line: 11, column: 1, scope: !34) 207!39 = distinct !DISubprogram(name: "func_from_b", scope: !8, file: !8, line: 13, type: !18, scopeLine: 13, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !7, retainedNodes: !2) 208!40 = !DILocation(line: 13, column: 46, scope: !39) 209!41 = distinct !DISubprogram(name: "call_func_in_b_from_b", scope: !8, file: !8, line: 14, type: !18, scopeLine: 14, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !7, retainedNodes: !2) 210!42 = !DILocation(line: 15, column: 3, scope: !41) 211!43 = !DILocation(line: 16, column: 1, scope: !41) 212