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Diffstat (limited to 'test/Linker/subprogram-linkonce-weak-odr.ll')
| -rw-r--r-- | test/Linker/subprogram-linkonce-weak-odr.ll | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/test/Linker/subprogram-linkonce-weak-odr.ll b/test/Linker/subprogram-linkonce-weak-odr.ll new file mode 100644 index 0000000..97058fd --- /dev/null +++ b/test/Linker/subprogram-linkonce-weak-odr.ll @@ -0,0 +1,177 @@ +; RUN: llvm-link %s %S/Inputs/subprogram-linkonce-weak-odr.ll -S -o %t1 +; RUN: FileCheck %s -check-prefix=LW -check-prefix=CHECK <%t1 +; RUN: llvm-link %S/Inputs/subprogram-linkonce-weak-odr.ll %s -S -o %t2 +; RUN: FileCheck %s -check-prefix=WL -check-prefix=CHECK <%t2 + +; This testcase tests the following flow: +; - File A defines a linkonce_odr version of @foo which has inlined into @bar. +; - File B defines a weak_odr version of @foo (identical definition). +; - Linkage rules state File B version of @foo wins. +; - Debug info for the subprograms of @foo match exactly. Without +; intervention, the same subprogram would show up in both compile units, and +; it would get associated with the compile unit where it was linkonce. +; - @bar has inlined debug info related to the linkonce_odr @foo. +; +; This checks a corner case for the fix for PR22792, where subprograms match +; exactly. It's a companion for subprogram-linkonce-weak.ll. + +; The LW prefix means linkonce (this file) first, then weak (the other file). +; The WL prefix means weak (the other file) first, then linkonce (this file). + +; We'll see @bar before @foo if this file is first. +; LW-LABEL: define i32 @bar( +; LW: %sum = add i32 %a, %b, !dbg ![[FOOINBAR:[0-9]+]] +; LW: ret i32 %sum, !dbg ![[BARRET:[0-9]+]] +; LW-LABEL: define weak_odr i32 @foo( +; LW: %sum = add i32 %a, %b, !dbg ![[FOOADD:[0-9]+]] +; LW: ret i32 %sum, !dbg ![[FOORET:[0-9]+]] + +; We'll see @foo before @bar if this file is second. +; WL-LABEL: define weak_odr i32 @foo( +; WL: %sum = add i32 %a, %b, !dbg ![[FOOADD:[0-9]+]] +; WL: ret i32 %sum, !dbg ![[FOORET:[0-9]+]] +; WL-LABEL: define i32 @bar( +; WL: %sum = add i32 %a, %b, !dbg ![[FOOINBAR:[0-9]+]] +; WL: ret i32 %sum, !dbg ![[BARRET:[0-9]+]] + +define i32 @bar(i32 %a, i32 %b) { +entry: + %sum = add i32 %a, %b, !dbg !MDLocation(line: 2, scope: !4, + inlinedAt: !MDLocation(line: 12, scope: !3)) + ret i32 %sum, !dbg !MDLocation(line: 13, scope: !3) +} + +define linkonce_odr i32 @foo(i32 %a, i32 %b) { +entry: + %sum = add i32 %a, %b, !dbg !MDLocation(line: 2, scope: !4) + ret i32 %sum, !dbg !MDLocation(line: 3, scope: !4) +} + +!llvm.module.flags = !{!0} +!0 = !{i32 2, !"Debug Info Version", i32 3} + +; CHECK-LABEL: !llvm.dbg.cu = +; LW-SAME: !{![[LCU:[0-9]+]], ![[WCU:[0-9]+]]} +; WL-SAME: !{![[WCU:[0-9]+]], ![[LCU:[0-9]+]]} +!llvm.dbg.cu = !{!1} + +; LW: ![[LCU]] = !MDCompileUnit({{.*}} subprograms: ![[LSPs:[0-9]+]] +; LW: ![[LSPs]] = !{![[BARSP:[0-9]+]], ![[FOOSP:[0-9]+]]} +; LW: ![[BARSP]] = !MDSubprogram(name: "bar", +; LW-SAME: function: i32 (i32, i32)* @bar +; LW: ![[FOOSP]] = {{.*}}!MDSubprogram(name: "foo", +; LW-NOT: function: +; LW-SAME: ){{$}} +; LW: ![[WCU]] = !MDCompileUnit({{.*}} subprograms: ![[WSPs:[0-9]+]] +; LW: ![[WSPs]] = !{![[WEAKFOOSP:[0-9]+]]} +; LW: ![[WEAKFOOSP]] = !MDSubprogram(name: "foo", +; LW-SAME: function: i32 (i32, i32)* @foo +; LW: ![[FOOINBAR]] = !MDLocation(line: 2, scope: ![[FOOSP]], inlinedAt: ![[BARIA:[0-9]+]]) +; LW: ![[BARIA]] = !MDLocation(line: 12, scope: ![[BARSP]]) +; LW: ![[BARRET]] = !MDLocation(line: 13, scope: ![[BARSP]]) +; LW: ![[FOOADD]] = !MDLocation(line: 2, scope: ![[WEAKFOOSP]]) +; LW: ![[FOORET]] = !MDLocation(line: 3, scope: ![[WEAKFOOSP]]) + +; Same as above, but reordered. +; WL: ![[WCU]] = !MDCompileUnit({{.*}} subprograms: ![[WSPs:[0-9]+]] +; WL: ![[WSPs]] = !{![[WEAKFOOSP:[0-9]+]]} +; WL: ![[WEAKFOOSP]] = !MDSubprogram(name: "foo", +; WL-SAME: function: i32 (i32, i32)* @foo +; WL: ![[LCU]] = !MDCompileUnit({{.*}} subprograms: ![[LSPs:[0-9]+]] +; Note: for symmetry, LSPs would have a different copy of the subprogram. +; WL: ![[LSPs]] = !{![[BARSP:[0-9]+]], ![[WEAKFOOSP:[0-9]+]]} +; WL: ![[BARSP]] = !MDSubprogram(name: "bar", +; WL-SAME: function: i32 (i32, i32)* @bar +; WL: ![[FOOADD]] = !MDLocation(line: 2, scope: ![[WEAKFOOSP]]) +; WL: ![[FOORET]] = !MDLocation(line: 3, scope: ![[WEAKFOOSP]]) +; WL: ![[FOOINBAR]] = !MDLocation(line: 2, scope: ![[WEAKFOOSP]], inlinedAt: ![[BARIA:[0-9]+]]) +; WL: ![[BARIA]] = !MDLocation(line: 12, scope: ![[BARSP]]) +; WL: ![[BARRET]] = !MDLocation(line: 13, scope: ![[BARSP]]) + +!1 = !MDCompileUnit(language: DW_LANG_C99, file: !2, subprograms: !{!3, !4}, emissionKind: 1) +!2 = !MDFile(filename: "bar.c", directory: "/path/to/dir") +!3 = !MDSubprogram(file: !2, scope: !2, line: 11, name: "bar", function: i32 (i32, i32)* @bar, type: !6) +!4 = !MDSubprogram(file: !5, scope: !5, line: 1, name: "foo", function: i32 (i32, i32)* @foo, type: !6) +!5 = !MDFile(filename: "foo.h", directory: "/path/to/dir") +!6 = !MDSubroutineType(types: !{}) + +; Crasher for llc. +; REQUIRES: object-emission +; RUN: %llc_dwarf -filetype=obj -O0 %t1 -o %t1.o +; RUN: llvm-dwarfdump %t1.o -debug-dump=all | FileCheck %s -check-prefix=DWLW -check-prefix=DW +; RUN: %llc_dwarf -filetype=obj -O0 %t2 -o %t2.o +; RUN: llvm-dwarfdump %t2.o -debug-dump=all | FileCheck %s -check-prefix=DWWL -check-prefix=DW +; Check that the debug info puts the subprogram (with PCs) in the correct +; compile unit. + +; DW-LABEL: .debug_info contents: +; DWLW: DW_TAG_compile_unit +; DWLW: DW_AT_name {{.*}}"bar.c" +; Note: If we stop emitting foo here, the comment below for DWWL (and the +; check) should be copied up here. +; DWLW: DW_TAG_subprogram +; DWLW-NOT: DW_AT_low_pc +; DWLW-NOT: DW_AT_high_pc +; DWLW: DW_AT_name {{.*}}foo +; DWLW: DW_AT_decl_file {{.*}}"/path/to/dir/foo.h" +; DWLW: DW_AT_decl_line {{.*}}(1) +; DWLW: DW_TAG_subprogram +; DWLW: DW_AT_low_pc +; DWLW: DW_AT_high_pc +; DWLW: DW_AT_name {{.*}}bar +; DWLW: DW_AT_decl_file {{.*}}"/path/to/dir/bar.c" +; DWLW: DW_AT_decl_line {{.*}}(11) +; DWLW: DW_TAG_inlined_subroutine +; DWLW: DW_AT_abstract_origin +; DWLW: DW_TAG_compile_unit +; DWLW: DW_AT_name {{.*}}"foo.c" +; DWLW: DW_TAG_subprogram +; DWLW: DW_AT_low_pc +; DWLW: DW_AT_high_pc +; DWLW: DW_AT_name {{.*}}foo +; DWLW: DW_AT_decl_file {{.*}}"/path/to/dir/foo.h" +; DWLW: DW_AT_decl_line {{.*}}(1) + +; The DWARF output is already symmetric (just reordered). +; DWWL: DW_TAG_compile_unit +; DWWL: DW_AT_name {{.*}}"foo.c" +; DWWL: DW_TAG_subprogram +; DWWL: DW_AT_low_pc +; DWWL: DW_AT_high_pc +; DWWL: DW_AT_name {{.*}}foo +; DWWL: DW_AT_decl_file {{.*}}"/path/to/dir/foo.h" +; DWWL: DW_AT_decl_line {{.*}}(1) +; DWWL: DW_TAG_compile_unit +; DWWL: DW_AT_name {{.*}}"bar.c" +; Note: for symmetry, foo would also show up in this compile unit +; (alternatively, it wouldn't show up in the DWLW case). If we start emitting +; foo here, this should be updated by checking that we don't emit low_pc and +; high_pc for it. +; DWWL-NOT: DW_AT_name {{.*}}foo +; DWWL: DW_TAG_subprogram +; DWWL-NOT: DW_AT_name {{.*}}foo +; DWWL: DW_AT_low_pc +; DWWL: DW_AT_high_pc +; DWWL-NOT: DW_AT_name {{.*}}foo +; DWWL: DW_AT_name {{.*}}bar +; DWWL: DW_AT_decl_file {{.*}}"/path/to/dir/bar.c" +; DWWL: DW_AT_decl_line {{.*}}(11) +; DWWL: DW_TAG_inlined_subroutine +; DWWL: DW_AT_abstract_origin + +; DW-LABEL: .debug_line contents: +; Check that we have the right things in the line table as well. + +; DWLW-LABEL: file_names[{{ *}}1]{{.*}} bar.c +; DWLW-LABEL: file_names[{{ *}}2]{{.*}} foo.h +; DWLW: 2 0 2 0 0 is_stmt prologue_end +; DWLW-LABEL: file_names[{{ *}}1]{{.*}} foo.h +; DWLW: 2 0 1 0 0 is_stmt prologue_end +; DWLW-NOT: prologue_end + +; DWWL-LABEL: file_names[{{ *}}1]{{.*}} foo.h +; DWWL: 2 0 1 0 0 is_stmt prologue_end +; DWWL-LABEL: file_names[{{ *}}1]{{.*}} bar.c +; DWWL-LABEL: file_names[{{ *}}2]{{.*}} foo.h +; DWWL: 2 0 2 0 0 is_stmt prologue_end +; DWWL-NOT: prologue_end |