1; RUN: llvm-link %s %S/Inputs/subprogram-linkonce-weak.ll -S -o %t1 2; RUN: FileCheck %s -check-prefix=LW -check-prefix=CHECK <%t1 3; RUN: llvm-link %S/Inputs/subprogram-linkonce-weak.ll %s -S -o %t2 4; RUN: FileCheck %s -check-prefix=WL -check-prefix=CHECK <%t2 5; REQUIRES: default_triple 6 7; This testcase tests the following flow: 8; - File A defines a linkonce version of @foo which has inlined into @bar. 9; - File B defines a weak version of @foo (different definition). 10; - Linkage rules state File B version of @foo wins. 11; - @bar still has inlined debug info related to the linkonce @foo. 12; 13; This should fix PR22792, although the testcase was hand-written. There's a 14; RUN line with a crasher for llc at the end with checks for the DWARF output. 15 16; The LW prefix means linkonce (this file) first, then weak (the other file). 17; The WL prefix means weak (the other file) first, then linkonce (this file). 18 19; We'll see @bar before @foo if this file is first. 20; LW: define i32 @bar({{.*}} !dbg ![[BARSP:[0-9]+]] 21; LW: %sum = add i32 %a, %b, !dbg ![[FOOINBAR:[0-9]+]] 22; LW: ret i32 %sum, !dbg ![[BARRET:[0-9]+]] 23; LW: define weak i32 @foo({{.*}} !dbg ![[WEAKFOOSP:[0-9]+]] 24; LW: %sum = call i32 @fastadd(i32 %a, i32 %b), !dbg ![[FOOCALL:[0-9]+]] 25; LW: ret i32 %sum, !dbg ![[FOORET:[0-9]+]] 26 27; We'll see @foo before @bar if this file is second. 28; WL: define weak i32 @foo({{.*}} !dbg ![[WEAKFOOSP:[0-9]+]] 29; WL: %sum = call i32 @fastadd(i32 %a, i32 %b), !dbg ![[FOOCALL:[0-9]+]] 30; WL: ret i32 %sum, !dbg ![[FOORET:[0-9]+]] 31; WL: define i32 @bar({{.*}} !dbg ![[BARSP:[0-9]+]] 32; WL: %sum = add i32 %a, %b, !dbg ![[FOOINBAR:[0-9]+]] 33; WL: ret i32 %sum, !dbg ![[BARRET:[0-9]+]] 34 35define i32 @bar(i32 %a, i32 %b) !dbg !3 { 36entry: 37 %sum = add i32 %a, %b, !dbg !DILocation(line: 2, scope: !4, 38 inlinedAt: !DILocation(line: 12, scope: !3)) 39 ret i32 %sum, !dbg !DILocation(line: 13, scope: !3) 40} 41 42define linkonce i32 @foo(i32 %a, i32 %b) !dbg !4 { 43entry: 44 %sum = add i32 %a, %b, !dbg !DILocation(line: 2, scope: !4) 45 ret i32 %sum, !dbg !DILocation(line: 3, scope: !4) 46} 47 48!llvm.module.flags = !{!0} 49!0 = !{i32 2, !"Debug Info Version", i32 3} 50 51; CHECK-LABEL: !llvm.dbg.cu = 52; LW-SAME: !{![[LCU:[0-9]+]], ![[WCU:[0-9]+]]} 53; WL-SAME: !{![[WCU:[0-9]+]], ![[LCU:[0-9]+]]} 54!llvm.dbg.cu = !{!1} 55 56; LW: ![[LCU]] = distinct !DICompileUnit( 57; LW: ![[WCU]] = distinct !DICompileUnit( 58; LW: ![[BARSP]] = distinct !DISubprogram(name: "bar",{{.*}} unit: ![[LCU]] 59; LW: ![[FOOINBAR]] = !DILocation(line: 2, scope: ![[FOOSP:.*]], inlinedAt: ![[BARIA:[0-9]+]]) 60; LW: ![[FOOSP]] = distinct !DISubprogram(name: "foo",{{.*}} unit: ![[LCU]] 61; LW: ![[BARIA]] = !DILocation(line: 12, scope: ![[BARSP]]) 62; LW: ![[BARRET]] = !DILocation(line: 13, scope: ![[BARSP]]) 63; LW: ![[WEAKFOOSP]] = distinct !DISubprogram(name: "foo",{{.*}} unit: ![[WCU]] 64; LW: ![[FOOCALL]] = !DILocation(line: 52, scope: ![[WEAKFOOSP]]) 65; LW: ![[FOORET]] = !DILocation(line: 53, scope: ![[WEAKFOOSP]]) 66 67; Same as above, but reordered. 68; WL: ![[WCU]] = distinct !DICompileUnit( 69; WL: ![[LCU]] = distinct !DICompileUnit( 70; WL: ![[WEAKFOOSP]] = distinct !DISubprogram(name: "foo",{{.*}} unit: ![[WCU]] 71; WL: ![[FOOCALL]] = !DILocation(line: 52, scope: ![[WEAKFOOSP]]) 72; WL: ![[FOORET]] = !DILocation(line: 53, scope: ![[WEAKFOOSP]]) 73; WL: ![[BARSP]] = distinct !DISubprogram(name: "bar",{{.*}} unit: ![[LCU]] 74; WL: ![[FOOINBAR]] = !DILocation(line: 2, scope: ![[FOOSP:.*]], inlinedAt: ![[BARIA:[0-9]+]]) 75; WL: ![[FOOSP]] = distinct !DISubprogram(name: "foo",{{.*}} unit: ![[LCU]] 76; WL: ![[BARIA]] = !DILocation(line: 12, scope: ![[BARSP]]) 77; WL: ![[BARRET]] = !DILocation(line: 13, scope: ![[BARSP]]) 78 79!1 = distinct !DICompileUnit(language: DW_LANG_C99, file: !2, emissionKind: FullDebug) 80!2 = !DIFile(filename: "bar.c", directory: "/path/to/dir") 81!3 = distinct !DISubprogram(file: !2, scope: !2, line: 11, name: "bar", type: !5, unit: !1) 82!4 = distinct !DISubprogram(file: !2, scope: !2, line: 1, name: "foo", type: !5, unit: !1) 83!5 = !DISubroutineType(types: !{}) 84 85; Crasher for llc. 86; REQUIRES: object-emission 87; RUN: %llc_dwarf -filetype=obj -O0 %t1 -o %t1.o 88; RUN: llvm-dwarfdump %t1.o --all | FileCheck %s -check-prefix=DWLW -check-prefix=DW 89; RUN: %llc_dwarf -filetype=obj -O0 %t2 -o %t2.o 90; RUN: llvm-dwarfdump %t2.o --all | FileCheck %s -check-prefix=DWWL -check-prefix=DW 91; Check that the debug info for the discarded linkonce version of @foo doesn't 92; reference any code, and that the other subprograms look correct. 93 94; DW-LABEL: .debug_info contents: 95; DWLW: DW_TAG_compile_unit 96; DWLW: DW_AT_name {{.*}}"bar.c" 97; DWLW: DW_TAG_subprogram 98; DWLW-NOT: DW_AT_low_pc 99; DWLW-NOT: DW_AT_high_pc 100; DWLW: DW_AT_name {{.*}}foo 101; DWLW: DW_AT_decl_file {{.*}}"/path/to/dir{{/|\\}}bar.c" 102; DWLW: DW_AT_decl_line {{.*}}(1) 103; DWLW: DW_TAG_subprogram 104; DWLW: DW_AT_low_pc 105; DWLW: DW_AT_high_pc 106; DWLW: DW_AT_name {{.*}}bar 107; DWLW: DW_AT_decl_file {{.*}}"/path/to/dir{{/|\\}}bar.c" 108; DWLW: DW_AT_decl_line {{.*}}(11) 109 110; DWLW: DW_TAG_inlined_subroutine 111; DWLW: DW_AT_abstract_origin 112; DWLW: DW_TAG_compile_unit 113; DWLW: DW_AT_name {{.*}}"foo.c" 114; DWLW: DW_TAG_subprogram 115; DWLW: DW_AT_low_pc 116; DWLW: DW_AT_high_pc 117; DWLW: DW_AT_name {{.*}}foo 118; DWLW: DW_AT_decl_file {{.*}}"/path/to/dir{{/|\\}}foo.c" 119; DWLW: DW_AT_decl_line {{.*}}(51) 120 121; The DWARF output is already symmetric (just reordered). 122; DWWL: DW_TAG_compile_unit 123; DWWL: DW_AT_name {{.*}}"foo.c" 124; DWWL: DW_TAG_subprogram 125; DWWL: DW_AT_low_pc 126; DWWL: DW_AT_high_pc 127; DWWL: DW_AT_name {{.*}}foo 128; DWWL: DW_AT_decl_file {{.*}}"/path/to/dir{{/|\\}}foo.c" 129; DWWL: DW_AT_decl_line {{.*}}(51) 130; DWWL: DW_TAG_compile_unit 131; DWWL: DW_AT_name {{.*}}"bar.c" 132; DWWL: DW_TAG_subprogram 133; DWWL-NOT: DW_AT_low_pc 134; DWWL-NOT: DW_AT_high_pc 135; DWWL: DW_AT_name {{.*}}foo 136; DWWL: DW_AT_decl_file {{.*}}"/path/to/dir{{/|\\}}bar.c" 137; DWWL: DW_AT_decl_line {{.*}}(1) 138; DWWL: DW_TAG_subprogram 139; DWWL: DW_AT_low_pc 140; DWWL: DW_AT_high_pc 141; DWWL: DW_AT_name {{.*}}bar 142; DWWL: DW_AT_decl_file {{.*}}"/path/to/dir{{/|\\}}bar.c" 143; DWWL: DW_AT_decl_line {{.*}}(11) 144; DWWL: DW_TAG_inlined_subroutine 145; DWWL: DW_AT_abstract_origin 146 147; DW-LABEL: .debug_line contents: 148; Check that we have the right things in the line table as well. 149 150; DWLW-LABEL: file_names[ 1]: 151; DWLW-NEXT: name: "bar.c" 152; DWLW: 2 0 1 0 0 is_stmt prologue_end 153; DWLW-LABEL: file_names[ 1]: 154; DWLW-NEXT: name: "foo.c" 155; DWLW: 52 0 1 0 0 is_stmt prologue_end 156; DWLW-NOT: prologue_end 157 158; DWWL-LABEL: file_names[ 1]: 159; DWWL-NEXT: name: "foo.c" 160; DWWL: 52 0 1 0 0 is_stmt prologue_end 161; DWWL-LABEL: file_names[ 1]: 162; DWWL-NEXT: name: "bar.c" 163; DWWL: 2 0 1 0 0 is_stmt prologue_end 164; DWWL-NOT: prologue_end 165