mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-02 07:11:49 +00:00
b265a82d58
described by integer constants. This is a bit ugly, but if the source
language allows arbitrary type casting, the debug info must follow suit.
For example:
void foo() {
float a;
*(int *)&a = 0;
}
For the curious: SROA replaces the float alloca with an i32 alloca, which
is then optimized away and described via dbg.value(i32 0, ...).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227827 91177308-0d34-0410-b5e6-96231b3b80d8
56 lines
2.6 KiB
LLVM
56 lines
2.6 KiB
LLVM
; RUN: llc < %s -filetype=obj | llvm-dwarfdump -debug-dump=info - | FileCheck %s
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; from (at -Os):
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; void foo() {
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; float a = 3.14;
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; *(int *)&a = 0;
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; }
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.10.0"
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; Function Attrs: nounwind optsize readnone uwtable
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define void @foo() #0 {
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entry:
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tail call void @llvm.dbg.declare(metadata float* undef, metadata !13, metadata !19), !dbg !20
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tail call void @llvm.dbg.value(metadata i32 1078523331, i64 0, metadata !13, metadata !19), !dbg !20
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tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !13, metadata !19), !dbg !20
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; CHECK: DW_AT_const_value [DW_FORM_sdata] (0)
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; CHECK-NEXT: DW_AT_name {{.*}}"a"
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ret void, !dbg !21
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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 readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
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attributes #0 = { nounwind optsize readnone uwtable }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!15, !16, !17}
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!llvm.ident = !{!18}
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!0 = !{!"0x11\0012\00clang version 3.7.0 (trunk 227686)\001\00\000\00\001", !1, !2, !3, !6, !2, !2} ; [ DW_TAG_compile_unit ] [foo.c] [DW_LANG_C99]
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!1 = !{!"foo.c", !""}
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!2 = !{}
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!3 = !{!4}
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!4 = !{!"0xf\00\000\0064\0064\000\000", null, null, !5} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from int]
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!5 = !{!"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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!6 = !{!7}
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!7 = !{!"0x2e\00foo\00foo\00\001\000\001\000\000\000\001\001", !8, !9, !10, null, void ()* @foo, null, null, !12} ; [ DW_TAG_subprogram ] [line 1] [def] [foo]
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!8 = !{!"foo.c", !""}
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!9 = !{!"0x29", !8} ; [ DW_TAG_file_type ]
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!10 = !{!"0x15\00\000\000\000\000\000\000", null, null, null, !11, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!11 = !{null}
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!12 = !{!13}
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!13 = !{!"0x100\00a\002\000", !7, !9, !14} ; [ DW_TAG_auto_variable ] [a] [line 2]
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!14 = !{!"0x24\00float\000\0032\0032\000\000\004", null, null} ; [ DW_TAG_base_type ] [float] [line 0, size 32, align 32, offset 0, enc DW_ATE_float]
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!15 = !{i32 2, !"Dwarf Version", i32 2}
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!16 = !{i32 2, !"Debug Info Version", i32 2}
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!17 = !{i32 1, !"PIC Level", i32 2}
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!18 = !{!"clang version 3.7.0 (trunk 227686)"}
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!19 = !{!"0x102"} ; [ DW_TAG_expression ]
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!20 = !MDLocation(line: 2, column: 9, scope: !7)
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!21 = !MDLocation(line: 4, column: 1, scope: !7)
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