| ; REQUIRES: object-emission |
| |
| ; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s |
| |
| ; Built from the following source with clang -O1 |
| ; struct S { int i; }; |
| ; int function(struct S s, int i) { return s.i + i; } |
| |
| ; Due to the X86_64 ABI, 's' is passed in registers and once optimized, the |
| ; entirety of 's' is never reconstituted, since only the int is required, and |
| ; thus the variable's location is unknown/dead to debug info. |
| |
| ; Future/current work should enable us to describe partial variables, which, in |
| ; this case, happens to be the entire variable. |
| |
| ; CHECK: DW_TAG_subprogram |
| ; CHECK-NOT: DW_TAG |
| ; CHECK: DW_AT_name {{.*}} "function" |
| ; CHECK-NOT: {{DW_TAG|NULL}} |
| ; CHECK: DW_TAG_formal_parameter |
| ; CHECK-NOT: DW_TAG |
| ; CHECK: DW_AT_name {{.*}} "s" |
| ; CHECK-NOT: DW_TAG |
| ; FIXME: Even though 's' is never reconstituted into a struct, the one member |
| ; variable is still live and used, and so we should be able to describe 's's |
| ; location as the location of that int. |
| ; CHECK-NOT: DW_AT_location |
| ; CHECK-NOT: {{DW_TAG|NULL}} |
| ; CHECK: DW_TAG_formal_parameter |
| ; CHECK-NOT: DW_TAG |
| ; CHECK: DW_AT_location |
| ; CHECK-NOT: DW_TAG |
| ; CHECK: DW_AT_name {{.*}} "i" |
| |
| |
| %struct.S = type { i32 } |
| |
| ; Function Attrs: nounwind readnone uwtable |
| define i32 @_Z8function1Si(i32 %s.coerce, i32 %i) #0 { |
| entry: |
| tail call void @llvm.dbg.declare(metadata %struct.S* undef, metadata !14, metadata !{!"0x102"}), !dbg !20 |
| tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !15, metadata !{!"0x102"}), !dbg !20 |
| %add = add nsw i32 %i, %s.coerce, !dbg !20 |
| ret i32 %add, !dbg !20 |
| } |
| |
| ; Function Attrs: nounwind readnone |
| declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 |
| |
| ; Function Attrs: nounwind readnone |
| declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1 |
| |
| attributes #0 = { nounwind readnone uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #1 = { nounwind readnone } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!16, !17} |
| !llvm.ident = !{!18} |
| |
| !0 = !{!"0x11\004\00clang version 3.5.0 \001\00\000\00\001", !1, !2, !3, !8, !2, !2} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/dead-argument-order.cpp] [DW_LANG_C_plus_plus] |
| !1 = !{!"dead-argument-order.cpp", !"/tmp/dbginfo"} |
| !2 = !{} |
| !3 = !{!4} |
| !4 = !{!"0x13\00S\001\0032\0032\000\000\000", !1, null, null, !5, null, null, !"_ZTS1S"} ; [ DW_TAG_structure_type ] [S] [line 1, size 32, align 32, offset 0] [def] [from ] |
| !5 = !{!6} |
| !6 = !{!"0xd\00i\001\0032\0032\000\000", !1, !"_ZTS1S", !7} ; [ DW_TAG_member ] [i] [line 1, size 32, align 32, offset 0] [from int] |
| !7 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed] |
| !8 = !{!9} |
| !9 = !{!"0x2e\00function\00function\00_Z8function1Si\002\000\001\000\006\00256\001\002", !1, !10, !11, null, i32 (i32, i32)* @_Z8function1Si, null, null, !13} ; [ DW_TAG_subprogram ] [line 2] [def] [function] |
| !10 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/dead-argument-order.cpp] |
| !11 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !12, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] |
| !12 = !{!7, !4, !7} |
| !13 = !{!14, !15} |
| !14 = !{!"0x101\00s\0016777218\000", !9, !10, !"_ZTS1S"} ; [ DW_TAG_arg_variable ] [s] [line 2] |
| !15 = !{!"0x101\00i\0033554434\000", !9, !10, !7} ; [ DW_TAG_arg_variable ] [i] [line 2] |
| !16 = !{i32 2, !"Dwarf Version", i32 4} |
| !17 = !{i32 2, !"Debug Info Version", i32 2} |
| !18 = !{!"clang version 3.5.0 "} |
| !19 = !{%struct.S* undef} |
| !20 = !MDLocation(line: 2, scope: !9) |
| |