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https://github.com/c64scene-ar/llvm-6502.git
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e240cc0b4b
frontends to use a DIExpression with a DW_OP_deref instead. This is not only a much more natural place for this informationl; there is also a technical reason: The FlagIndirectVariable is used to mark a variable that is turned into a reference by virtue of the calling convention; this happens for example to aggregate return values. The inliner, for example, may actually need to undo this indirection to correctly represent the value in its new context. This is impossible to implement because the DIVariable can't be safely modified. We can however safely construct a new DIExpression on the fly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226476 91177308-0d34-0410-b5e6-96231b3b80d8
71 lines
3.0 KiB
LLVM
71 lines
3.0 KiB
LLVM
; A by-value struct is a register-indirect value (breg).
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; RUN: llc %s -filetype=asm -o - | FileCheck %s
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; CHECK: DW_AT_location
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; CHECK-NEXT: .byte 112
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; 112 = 0x70 = DW_OP_breg0
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; rdar://problem/13658587
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;
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; Generated from
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;
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; struct five
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; {
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; int a;
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; int b;
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; int c;
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; int d;
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; int e;
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; };
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;
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; int
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; return_five_int (struct five f)
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; {
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; return f.a;
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; }
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n32:64-S128"
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target triple = "arm64-apple-ios3.0.0"
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%struct.five = type { i32, i32, i32, i32, i32 }
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; Function Attrs: nounwind ssp
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define i32 @return_five_int(%struct.five* %f) #0 {
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entry:
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call void @llvm.dbg.declare(metadata %struct.five* %f, metadata !17, metadata !{!"0x102\006"}), !dbg !18
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%a = getelementptr inbounds %struct.five* %f, i32 0, i32 0, !dbg !19
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%0 = load i32* %a, align 4, !dbg !19
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ret i32 %0, !dbg !19
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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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attributes #0 = { nounwind ssp }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!16, !20}
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!0 = !{!"0x11\0012\00LLVM version 3.4 \000\00\000\00\000", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [struct_by_value.c] [DW_LANG_C99]
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!1 = !{!"struct_by_value.c", !""}
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!2 = !{}
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!3 = !{!4}
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!4 = !{!"0x2e\00return_five_int\00return_five_int\00\0013\000\001\000\006\00256\000\0014", !1, !5, !6, null, i32 (%struct.five*)* @return_five_int, null, null, !2} ; [ DW_TAG_subprogram ] [line 13] [def] [scope 14] [return_five_int]
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!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [struct_by_value.c]
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!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 ]
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!7 = !{!8, !9}
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!8 = !{!"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]
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!9 = !{!"0x13\00five\001\00160\0032\000\000\000", !1, null, null, !10, null, null, null} ; [ DW_TAG_structure_type ] [five] [line 1, size 160, align 32, offset 0] [def] [from ]
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!10 = !{!11, !12, !13, !14, !15}
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!11 = !{!"0xd\00a\003\0032\0032\000\000", !1, !9, !8} ; [ DW_TAG_member ] [a] [line 3, size 32, align 32, offset 0] [from int]
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!12 = !{!"0xd\00b\004\0032\0032\0032\000", !1, !9, !8} ; [ DW_TAG_member ] [b] [line 4, size 32, align 32, offset 32] [from int]
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!13 = !{!"0xd\00c\005\0032\0032\0064\000", !1, !9, !8} ; [ DW_TAG_member ] [c] [line 5, size 32, align 32, offset 64] [from int]
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!14 = !{!"0xd\00d\006\0032\0032\0096\000", !1, !9, !8} ; [ DW_TAG_member ] [d] [line 6, size 32, align 32, offset 96] [from int]
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!15 = !{!"0xd\00e\007\0032\0032\00128\000", !1, !9, !8} ; [ DW_TAG_member ] [e] [line 7, size 32, align 32, offset 128] [from int]
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!16 = !{i32 2, !"Dwarf Version", i32 2}
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!17 = !{!"0x101\00f\0016777229\000", !4, !5, !9} ; [ DW_TAG_arg_variable ] [f] [line 13]
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!18 = !MDLocation(line: 13, scope: !4)
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!19 = !MDLocation(line: 16, scope: !4)
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!20 = !{i32 1, !"Debug Info Version", i32 2}
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