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llvm-project/llvm/test/DebugInfo/constant-pointers.ll

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PR19767: DebugInfo emission of pointer constants. In refactoring DwarfUnit::isUnsignedDIType I restricted it to only work on values with signedness (unsigned or signed), asserting on anything else (which did uncover some bugs). But it turns out that we do need to emit constants of signless data, such as pointer constants - only null pointer constants are known to need this so far, but it's conceivable that there might be non-null pointer constants at some point (hardcoded address offsets for device drivers?). This patch just uses 'unsigned' for signless data such as pointer constants. Arguably we could use signless representations (DW_FORM_dataN) instead, allowing a trinary result from isUnsignedDIType (signed, unsigned, signless), but this seems reasonable for now. llvm-svn: 209223
2014-05-21 02:21:51 +08:00
; REQUIRES: object-emission
; RUN: %llc_dwarf -O0 -filetype=obj %s -o - | llvm-dwarfdump -debug-dump=info - | FileCheck %s
; Ensure that pointer constants are emitted as unsigned data. Alternatively,
; these could be signless data (dataN).
; Built with Clang from:
; template <void *V, void (*F)(), int i>
; void func() {}
; template void func<nullptr, nullptr, 42>();
; CHECK: DW_TAG_subprogram
; CHECK: DW_TAG_template_value_parameter
; CHECK: DW_AT_name {{.*}} "V"
; CHECK: DW_AT_const_value [DW_FORM_udata] (0)
; CHECK: DW_TAG_template_value_parameter
; CHECK: DW_AT_name {{.*}} "F"
; CHECK: DW_AT_const_value [DW_FORM_udata] (0)
; Function Attrs: nounwind uwtable
define weak_odr void @_Z4funcILPv0ELPFvvE0ELi42EEvv() #0 {
entry:
ret void, !dbg !18
}
attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!15, !16}
!llvm.ident = !{!17}
IR: Make metadata typeless in assembly Now that `Metadata` is typeless, reflect that in the assembly. These are the matching assembly changes for the metadata/value split in r223802. - Only use the `metadata` type when referencing metadata from a call intrinsic -- i.e., only when it's used as a `Value`. - Stop pretending that `ValueAsMetadata` is wrapped in an `MDNode` when referencing it from call intrinsics. So, assembly like this: define @foo(i32 %v) { call void @llvm.foo(metadata !{i32 %v}, metadata !0) call void @llvm.foo(metadata !{i32 7}, metadata !0) call void @llvm.foo(metadata !1, metadata !0) call void @llvm.foo(metadata !3, metadata !0) call void @llvm.foo(metadata !{metadata !3}, metadata !0) ret void, !bar !2 } !0 = metadata !{metadata !2} !1 = metadata !{i32* @global} !2 = metadata !{metadata !3} !3 = metadata !{} turns into this: define @foo(i32 %v) { call void @llvm.foo(metadata i32 %v, metadata !0) call void @llvm.foo(metadata i32 7, metadata !0) call void @llvm.foo(metadata i32* @global, metadata !0) call void @llvm.foo(metadata !3, metadata !0) call void @llvm.foo(metadata !{!3}, metadata !0) ret void, !bar !2 } !0 = !{!2} !1 = !{i32* @global} !2 = !{!3} !3 = !{} I wrote an upgrade script that handled almost all of the tests in llvm and many of the tests in cfe (even handling many `CHECK` lines). I've attached it (or will attach it in a moment if you're speedy) to PR21532 to help everyone update their out-of-tree testcases. This is part of PR21532. llvm-svn: 224257
2014-12-16 03:07:53 +08:00
!0 = !{!"0x11\004\00clang version 3.5.0 \000\00\000\00\001", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/constant-pointers.cpp] [DW_LANG_C_plus_plus]
!1 = !{!"constant-pointers.cpp", !"/tmp/dbginfo"}
!2 = !{}
!3 = !{!4}
!4 = !{!"0x2e\00func<nullptr, nullptr, 42>\00func<nullptr, nullptr, 42>\00_Z4funcILPv0ELPFvvE0ELi42EEvv\002\000\001\000\006\00256\000\002", !1, !5, !6, null, void ()* @_Z4funcILPv0ELPFvvE0ELi42EEvv, !8, null, !2} ; [ DW_TAG_subprogram ] [line 2] [def] [func<nullptr, nullptr, 42>]
!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/constant-pointers.cpp]
!6 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!7 = !{null}
!8 = !{!9, !11, !13}
!9 = !{!"0x30\00V\000\000", null, !10, i8 0, null} ; [ DW_TAG_template_value_parameter ]
!10 = !{!"0xf\00\000\0064\0064\000\000", null, null, null} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from ]
!11 = !{!"0x30\00F\000\000", null, !12, i8 0, null} ; [ DW_TAG_template_value_parameter ]
!12 = !{!"0xf\00\000\0064\0064\000\000", null, null, !6} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from ]
!13 = !{!"0x30\00i\000\000", null, !14, i32 42, null} ; [ DW_TAG_template_value_parameter ]
!14 = !{!"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]
!15 = !{i32 2, !"Dwarf Version", i32 4}
!16 = !{i32 2, !"Debug Info Version", i32 2}
!17 = !{!"clang version 3.5.0 "}
IR: Move MDLocation into place This commit moves `MDLocation`, finishing off PR21433. There's an accompanying clang commit for frontend testcases. I'll attach the testcase upgrade script I used to PR21433 to help out-of-tree frontends/backends. This changes the schema for `DebugLoc` and `DILocation` from: !{i32 3, i32 7, !7, !8} to: !MDLocation(line: 3, column: 7, scope: !7, inlinedAt: !8) Note that empty fields (line/column: 0 and inlinedAt: null) don't get printed by the assembly writer. llvm-svn: 226048
2015-01-15 06:27:36 +08:00
!18 = !MDLocation(line: 3, scope: !4)