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llvm-project/llvm/test/DebugInfo/MSP430/ranges_always.ll
Ilya Kuklin c395a84600 [MSP430] Get the DWARF pointer size from MCAsmInfo instead of DataLayout. 
This change will allow to put code pointers in DWARF info fields that are larger than actual pointer size, e.g. 16-bit pointers into 32-bit fields.

The need for this came up while creating support for MSP430 in LLDB. MSP430-GCC already generates DWARF info with 32-bit fields, so this change is necessary for LLDB to maintain compatibility with both GCC and LLVM binaries. Moreover, right now in LLDB there is no support for having DWARF pointer size different from ELF header type, e.g. 16-bit DWARF info within ELF32, and it seems there is no such thing as ELF16.

Since other mainline targets are made to have the same pointer size in both MCAsmInfo and DataLayout, there is no need to change anything there.

Reviewed By: dblaikie

Differential Revision: https://reviews.llvm.org/D148042
2023-05-04 12:37:30 -07:00

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; RUN: llc -O0 %s -mtriple=msp430 -filetype=obj -o - -minimize-addr-in-v5=Ranges \
; RUN: | llvm-dwarfdump -debug-info -debug-addr -debug-rnglists -v - \
; RUN: | FileCheck --check-prefix=CHECK --check-prefix=RNG \
; RUN: --implicit-check-not=DW_TAG --implicit-check-not=NULL --implicit-check-not=_pc %s
; RUN: llc -O0 %s -mtriple=msp430 -filetype=obj -o - -minimize-addr-in-v5=Expressions \
; RUN: | llvm-dwarfdump -debug-info -debug-addr -debug-rnglists -v - \
; RUN: | FileCheck --check-prefix=CHECK --check-prefix=EXPRORFORM --check-prefix=EXPR\
; RUN: --implicit-check-not=DW_TAG --implicit-check-not=NULL --implicit-check-not=_pc %s
; RUN: llc -O0 %s -mtriple=msp430 -filetype=obj -o - -minimize-addr-in-v5=Form \
; RUN: | llvm-dwarfdump -debug-info -debug-addr -debug-rnglists -v - \
; RUN: | FileCheck --check-prefix=CHECK --check-prefix=EXPRORFORM --check-prefix=FORM \
; RUN: --implicit-check-not=DW_TAG --implicit-check-not=NULL --implicit-check-not=_pc %s
; Ported from X86 test to cover 2-byte address size case
; Check that 16-bit addresses of MSP430 are properly stored
; in 32-bit DWARF fields
; Generated from the following source. f4 is used to put a hole in the CU
; ranges while keeping f2 and f4 in the same section (as opposed to
; -ffunction-sections, which would produce CU ranges, but each function would
; be in a different section, so unable to share addresses). The call to f1 at
; the start of f3 ensures the range for the inlined subroutine doesn't share
; the starting address with f3 (so it can be improved by using a rnglist to
; allow it to share an address it wouldn't already be sharing).
; Without f6 being in another section, technically we could use a non-zero CU
; low_pc that could act as a base address for all the addresses in the CU & avoid
; the need for these forced rnglists - we don't do that currently, but f6 ensures
; that this test will remain meaningful even if that improvement is made in the
; future. (implementing that would require detecting that all the addresses in
; the CU ranges are in the same section, then picking the lowest such address as
; the base address to make all other addresses relative to)
; IR from the following, compiled with:
; $ clang -g -c -gdwarf-5 -O1
; __attribute__((optnone)) void f1() { }
; __attribute__((always_inline)) inline void f2() {
; f1();
; }
; void f3() {
; f1();
; f2();
; }
; __attribute__((nodebug)) void f4() {
; }
; void f5() {
; }
; __attribute__((section(".other"))) void f6() {
; }
; CHECK-LABEL: .debug_info contents:
; CHECK: DW_TAG_compile_unit
; CHECK: DW_AT_low_pc
; CHECK-SAME: (0x00000000)
; RNG: DW_AT_ranges
; RNG-SAME: (indexed (0x3) rangelist = [[CU_RANGE:.*]]
; EXPRORFORM: DW_AT_ranges
; EXPRORFORM-SAME: (indexed (0x0) rangelist = [[CU_RANGE:.*]]
; CHECK: DW_TAG_subprogram
; CHECK: DW_AT_low_pc
; CHECK-SAME: (indexed (00000000) address = 0x00000000 ".text")
; CHECK: DW_AT_high_pc
; CHECK-SAME: (0x00000002)
; CHECK: DW_AT_name
; CHECK-SAME: "f1"
; CHECK: DW_TAG_subprogram
; CHECK: DW_AT_name
; CHECK-SAME: "f2"
; CHECK: DW_TAG_subprogram
; EXPR: DW_AT_low_pc
; EXPR-SAME: (DW_OP_addrx 0x0, DW_OP_const4u 0x2, DW_OP_plus)
; FORM: DW_AT_low_pc
; FORM-SAME: [DW_FORM_LLVM_addrx_offset] (indexed (00000000) + 0x2 address = 0x00000002 ".text")
; EXPRORFORM: DW_AT_high_pc
; EXPRORFORM-SAME: (0x0000000a)
; RNG: DW_AT_ranges
; RNG-SAME: (indexed (0x0) rangelist = [[F3_RANGE:.*]]
; CHECK: DW_AT_name
; CHECK-SAME: "f3"
; CHECK: DW_TAG_inlined_subroutine
; EXPR: DW_AT_low_pc
; EXPR-SAME: [DW_FORM_exprloc] (DW_OP_addrx 0x0, DW_OP_const4u 0x6, DW_OP_plus)
; FORM: DW_AT_low_pc
; FORM-SAME: [DW_FORM_LLVM_addrx_offset] (indexed (00000000) + 0x6 address = 0x00000006 ".text")
; EXPRORFORM: DW_AT_high_pc
; EXPRORFORM-SAME: (0x00000004)
; RNG: DW_AT_ranges
; RNG-SAME: (indexed (0x1) rangelist = [[INL_RANGE:.*]]
; CHECK: DW_TAG_call_site
; RNG: DW_AT_call_return_pc
; RNG-SAME: (indexed (00000001) address = 0x00000006 ".text")
; EXPR: DW_AT_call_return_pc
; EXPR-SAME: [DW_FORM_exprloc] (DW_OP_addrx 0x0, DW_OP_const4u 0x6, DW_OP_plus)
; FORM: DW_AT_call_return_pc
; FORM-SAME: [DW_FORM_LLVM_addrx_offset] (indexed (00000000) + 0x6 address = 0x00000006 ".text")
; CHECK: DW_TAG_call_site
; RNG: DW_AT_call_return_pc
; RNG-SAME: (indexed (00000002) address = 0x0000000a ".text")
; EXPR: DW_AT_call_return_pc
; EXPR-SAME: [DW_FORM_exprloc] (DW_OP_addrx 0x0, DW_OP_const4u 0xa, DW_OP_plus)
; FORM: DW_AT_call_return_pc
; FORM-SAME: [DW_FORM_LLVM_addrx_offset] (indexed (00000000) + 0xa address = 0x0000000a ".text")
; CHECK: NULL
; CHECK: DW_TAG_subprogram
; EXPR: DW_AT_low_pc
; EXPR-SAME: [DW_FORM_exprloc] (DW_OP_addrx 0x0, DW_OP_const4u 0xe, DW_OP_plus)
; FORM: DW_AT_low_pc
; FORM-SAME: [DW_FORM_LLVM_addrx_offset] (indexed (00000000) + 0xe address = 0x0000000e ".text")
; EXPRORFORM: DW_AT_high_pc
; EXPRORFORM-SAME: (0x00000002)
; RNG: DW_AT_ranges
; RNG-SAME: (indexed (0x2) rangelist = [[F5_RANGE:.*]]
; CHECK: DW_AT_name
; CHECK-SAME: "f5"
; CHECK: DW_TAG_subprogram
; CHECK: DW_AT_low_pc [DW_FORM_addrx] (indexed (
; RNG-SAME: 00000003
; EXPRORFORM-SAME: 00000001
; CHECK: ) address = 0x00000000 ".other")
; CHECK: DW_AT_high_pc
; CHECK-SAME: (0x00000006)
; CHECK: DW_AT_name
; CHECK-SAME: "f6"
; CHECK: DW_TAG_inlined_subroutine
; RNG: DW_AT_low_pc
; RNG-SAME: (indexed (00000003) address = 0x00000000 ".other")
; EXPRORFORM: DW_AT_low_pc
; EXPRORFORM-SAME: (indexed (00000001) address = 0x00000000 ".other")
; CHECK: DW_AT_high_pc
; CHECK-SAME: (0x00000004)
; CHECK: DW_TAG_call_site
; CHECK: DW_AT_call_return_pc
; CHECK: NULL
; CHECK: NULL
; CHECK-LABEL: .debug_addr contents:
; CHECK: 0x00000000: Address table
; CHECK-NEXT: Addrs: [
; CHECK-NEXT: 0x00000000
; RNG-NEXT: 0x00000006
; RNG-NEXT: 0x0000000a
; CHECK-NEXT: 0x00000000
; RNG-NEXT: 0x00000004
; CHECK-NEXT: ]
; CHECK-LABEL: .debug_rnglists contents:
; RNG: 0x00000000: range list header: {{.*}}, offset_entry_count = 0x00000004
; EXPRORFORM: 0x00000000: range list header: {{.*}}, offset_entry_count = 0x00000001
; CHECK: ranges:
; RNG-NEXT: [[F3_RANGE]]: [DW_RLE_base_addressx]:
; RNG-SAME: 0x00000000
; RNG-NEXT: [DW_RLE_offset_pair ]
; RNG-NEXT: [DW_RLE_end_of_list ]
; RNG-NEXT: [[INL_RANGE]]: [DW_RLE_base_addressx]:
; RNG-SAME: 0x00000000
; RNG-NEXT: [DW_RLE_offset_pair ]
; RNG-NEXT: [DW_RLE_end_of_list ]
; RNG-NEXT: [[F5_RANGE]]: [DW_RLE_base_addressx]:
; RNG-SAME: 0x00000000
; RNG-NEXT: [DW_RLE_offset_pair ]
; RNG-NEXT: [DW_RLE_end_of_list ]
; CHECK-NEXT: [[CU_RANGE]]: [DW_RLE_base_addressx]:
; CHECK-SAME: 0x00000000
; CHECK-NEXT: [DW_RLE_offset_pair ]
; CHECK-NEXT: [DW_RLE_offset_pair ]
; RNG-NEXT: [DW_RLE_startx_length]:
; RNG-SAME: 0x00000003
; EXPRORFORM-NEXT: [DW_RLE_startx_length]:
; EXPRORFORM-SAME: 0x00000001
; CHECK-NEXT: [DW_RLE_end_of_list ]
; Function Attrs: mustprogress noinline nounwind optnone uwtable
define dso_local void @_Z2f1v() local_unnamed_addr #0 !dbg !7 {
entry:
ret void, !dbg !12
}
; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z2f3v() local_unnamed_addr #1 !dbg !13 {
entry:
call void @_Z2f1v(), !dbg !14
call void @_Z2f1v() #3, !dbg !15
ret void, !dbg !18
}
; Function Attrs: mustprogress nofree norecurse nosync nounwind readnone uwtable willreturn
define dso_local void @_Z2f4v() local_unnamed_addr #2 {
entry:
ret void
}
; Function Attrs: mustprogress nofree norecurse nosync nounwind readnone uwtable willreturn
define dso_local void @_Z2f5v() local_unnamed_addr #2 !dbg !19 {
entry:
ret void, !dbg !20
}
; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z2f6v() local_unnamed_addr #1 section ".other" !dbg !21 {
entry:
call void @_Z2f1v() #3, !dbg !22
ret void, !dbg !24
}
attributes #0 = { mustprogress noinline nounwind optnone uwtable "frame-pointer"="none" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { mustprogress nounwind uwtable "frame-pointer"="none" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { mustprogress nofree norecurse nosync nounwind readnone uwtable willreturn "frame-pointer"="none" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!2, !3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 14.0.0 (git@github.com:llvm/llvm-project.git e2c3dc6fc76e767f08249f6d2c36e41660a4e331)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "/usr/local/google/home/blaikie/dev/scratch/test.cpp", directory: "/usr/local/google/home/blaikie/dev/llvm/src", checksumkind: CSK_MD5, checksum: "e70db21a276125757057e729999c09c7")
!2 = !{i32 7, !"Dwarf Version", i32 5}
!3 = !{i32 2, !"Debug Info Version", i32 3}
!4 = !{i32 1, !"wchar_size", i32 4}
!5 = !{i32 7, !"uwtable", i32 1}
!6 = !{!"clang version 14.0.0 (git@github.com:llvm/llvm-project.git e2c3dc6fc76e767f08249f6d2c36e41660a4e331)"}
!7 = distinct !DISubprogram(name: "f1", linkageName: "_Z2f1v", scope: !8, file: !8, line: 1, type: !9, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
!8 = !DIFile(filename: "scratch/test.cpp", directory: "/usr/local/google/home/blaikie/dev", checksumkind: CSK_MD5, checksum: "e70db21a276125757057e729999c09c7")
!9 = !DISubroutineType(types: !10)
!10 = !{null}
!11 = !{}
!12 = !DILocation(line: 1, column: 38, scope: !7)
!13 = distinct !DISubprogram(name: "f3", linkageName: "_Z2f3v", scope: !8, file: !8, line: 5, type: !9, scopeLine: 5, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
!14 = !DILocation(line: 6, column: 3, scope: !13)
!15 = !DILocation(line: 3, column: 3, scope: !16, inlinedAt: !17)
!16 = distinct !DISubprogram(name: "f2", linkageName: "_Z2f2v", scope: !8, file: !8, line: 2, type: !9, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
!17 = distinct !DILocation(line: 7, column: 3, scope: !13)
!18 = !DILocation(line: 8, column: 1, scope: !13)
!19 = distinct !DISubprogram(name: "f5", linkageName: "_Z2f5v", scope: !8, file: !8, line: 11, type: !9, scopeLine: 11, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
!20 = !DILocation(line: 12, column: 1, scope: !19)
!21 = distinct !DISubprogram(name: "f6", linkageName: "_Z2f6v", scope: !8, file: !8, line: 13, type: !9, scopeLine: 13, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
!22 = !DILocation(line: 3, column: 3, scope: !16, inlinedAt: !23)
!23 = distinct !DILocation(line: 14, column: 3, scope: !21)
!24 = !DILocation(line: 15, column: 1, scope: !21)
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