c395a84600
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
75 lines
3.3 KiB
LLVM
75 lines
3.3 KiB
LLVM
; RUN: llc -O0 -mtriple=msp430 -filetype=obj %s -o %t
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; RUN: llvm-dwarfdump -v %t | FileCheck %s
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; Ported from generic test to cover 2-byte address size case
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; Check that 16-bit addresses of MSP430 are properly stored
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; in 32-bit DWARF fields
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; Check that we emit ranges for this which has a non-traditional section and a normal section.
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; CHECK: DW_TAG_compile_unit
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; CHECK: DW_AT_ranges
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; CHECK: DW_TAG_subprogram
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; CHECK: DW_AT_low_pc
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; CHECK: DW_AT_high_pc
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; CHECK: DW_TAG_subprogram
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; CHECK: DW_AT_low_pc
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; CHECK: DW_AT_high_pc
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; CHECK: .debug_ranges contents:
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; CHECK-NEXT: 00000000 00000000 00000030
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; CHECK-NEXT: 00000000 00000000 00000030
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; CHECK-NEXT: 00000000 <End of list>
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; Function Attrs: nounwind uwtable
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define i32 @foo(i32 %a) #0 section "__TEXT,__foo" !dbg !4 {
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entry:
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%a.addr = alloca i32, align 4
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store i32 %a, ptr %a.addr, align 4
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call void @llvm.dbg.declare(metadata ptr %a.addr, metadata !13, metadata !DIExpression()), !dbg !14
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%0 = load i32, ptr %a.addr, align 4, !dbg !15
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%add = add nsw i32 %0, 5, !dbg !15
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ret i32 %add, !dbg !15
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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; Function Attrs: nounwind uwtable
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define i32 @bar(i32 %a) #0 !dbg !9 {
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entry:
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%a.addr = alloca i32, align 4
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store i32 %a, ptr %a.addr, align 4
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call void @llvm.dbg.declare(metadata ptr %a.addr, metadata !16, metadata !DIExpression()), !dbg !17
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%0 = load i32, ptr %a.addr, align 4, !dbg !18
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%add = add nsw i32 %0, 5, !dbg !18
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ret i32 %add, !dbg !18
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}
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attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!10, !11}
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!llvm.ident = !{!12}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5.0 (trunk 204164) (llvm/trunk 204183)", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
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!1 = !DIFile(filename: "foo.c", directory: "/usr/local/google/home/echristo")
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!2 = !{}
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!4 = distinct !DISubprogram(name: "foo", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 1, file: !1, scope: !5, type: !6, retainedNodes: !2)
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!5 = !DIFile(filename: "foo.c", directory: "/usr/local/google/home/echristo")
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!6 = !DISubroutineType(types: !7)
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!7 = !{!8, !8}
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!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!9 = distinct !DISubprogram(name: "bar", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 5, file: !1, scope: !5, type: !6, retainedNodes: !2)
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!10 = !{i32 2, !"Dwarf Version", i32 4}
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!11 = !{i32 1, !"Debug Info Version", i32 3}
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!12 = !{!"clang version 3.5.0 (trunk 204164) (llvm/trunk 204183)"}
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!13 = !DILocalVariable(name: "a", line: 1, arg: 1, scope: !4, file: !5, type: !8)
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!14 = !DILocation(line: 1, scope: !4)
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!15 = !DILocation(line: 2, scope: !4)
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!16 = !DILocalVariable(name: "a", line: 5, arg: 1, scope: !9, file: !5, type: !8)
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!17 = !DILocation(line: 5, scope: !9)
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!18 = !DILocation(line: 6, scope: !9)
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