mirror of
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
154 lines
6.6 KiB
LLVM
154 lines
6.6 KiB
LLVM
; RUN: llc %s -filetype=obj -O0 -mtriple=i386-unknown-linux-gnu -dwarf-version=4 -o %t
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; RUN: llvm-dwarfdump %t | FileCheck %s
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; From the code:
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; debug-loc-offset1.cc
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; int bar (int b) {
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; return b+4;
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; }
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; debug-loc-offset2.cc
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; struct A {
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; int var;
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; virtual char foo();
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; };
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; void baz(struct A a) {
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; int z = 2;
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; if (a.var > 2)
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; z++;
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; if (a.foo() == 'a')
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; z++;
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; }
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; Compiled separately for i386-pc-linux-gnu and linked together.
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; This ensures that we have multiple compile units so that we can verify that
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; debug_loc entries are relative to the low_pc of the CU. The loc entry for
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; the byval argument in foo.cpp is in the second CU and so should have
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; an offset relative to that CU rather than from the beginning of the text
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; section.
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; Checking that we have two compile units with two sets of high/lo_pc.
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; CHECK: .debug_info contents
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; CHECK: DW_TAG_compile_unit
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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_compile_unit
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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-NOT: DW_TAG
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; CHECK: DW_AT_MIPS_linkage_name [DW_FORM_strp]{{.*}}"_Z3baz1A"
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; CHECK-NOT: {{DW_TAG|NULL}}
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_location [DW_FORM_sec_offset] (0x00000000)
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name [DW_FORM_strp]{{.*}}"a"
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; CHECK: DW_TAG_variable
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; CHECK: DW_AT_location [DW_FORM_exprloc]
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; CHECK-NOT: DW_AT_location
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; CHECK: .debug_loc contents:
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; CHECK: 0x00000000: Beginning address offset: 0x0000000000000000
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; CHECK: Ending address offset: 0x000000000000001a
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%struct.A = type { i32 (...)**, i32 }
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; Function Attrs: nounwind
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define i32 @_Z3bari(i32 %b) #0 {
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entry:
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%b.addr = alloca i32, align 4
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store i32 %b, i32* %b.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %b.addr, metadata !21, metadata !{!"0x102"}), !dbg !22
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%0 = load i32* %b.addr, align 4, !dbg !23
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%add = add nsw i32 %0, 4, !dbg !23
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ret i32 %add, !dbg !23
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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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define void @_Z3baz1A(%struct.A* %a) #2 {
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entry:
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%z = alloca i32, align 4
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call void @llvm.dbg.declare(metadata %struct.A* %a, metadata !24, metadata !{!"0x102\006"}), !dbg !25
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call void @llvm.dbg.declare(metadata i32* %z, metadata !26, metadata !{!"0x102"}), !dbg !27
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store i32 2, i32* %z, align 4, !dbg !27
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%var = getelementptr inbounds %struct.A* %a, i32 0, i32 1, !dbg !28
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%0 = load i32* %var, align 4, !dbg !28
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%cmp = icmp sgt i32 %0, 2, !dbg !28
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br i1 %cmp, label %if.then, label %if.end, !dbg !28
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if.then: ; preds = %entry
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%1 = load i32* %z, align 4, !dbg !30
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%inc = add nsw i32 %1, 1, !dbg !30
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store i32 %inc, i32* %z, align 4, !dbg !30
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br label %if.end, !dbg !30
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if.end: ; preds = %if.then, %entry
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%call = call signext i8 @_ZN1A3fooEv(%struct.A* %a), !dbg !31
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%conv = sext i8 %call to i32, !dbg !31
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%cmp1 = icmp eq i32 %conv, 97, !dbg !31
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br i1 %cmp1, label %if.then2, label %if.end4, !dbg !31
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if.then2: ; preds = %if.end
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%2 = load i32* %z, align 4, !dbg !33
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%inc3 = add nsw i32 %2, 1, !dbg !33
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store i32 %inc3, i32* %z, align 4, !dbg !33
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br label %if.end4, !dbg !33
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if.end4: ; preds = %if.then2, %if.end
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ret void, !dbg !34
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}
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declare signext i8 @_ZN1A3fooEv(%struct.A*) #2
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attributes #0 = { nounwind "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" }
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attributes #1 = { nounwind readnone }
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attributes #2 = { "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" }
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!llvm.dbg.cu = !{!0, !9}
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!llvm.module.flags = !{!18, !19}
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!llvm.ident = !{!20, !20}
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!0 = !{!"0x11\004\00clang version 3.5.0 (210479)\000\00\000\00\001", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [/llvm_cmake_gcc/debug-loc-offset1.cc] [DW_LANG_C_plus_plus]
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!1 = !{!"debug-loc-offset1.cc", !"/llvm_cmake_gcc"}
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!2 = !{}
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!3 = !{!4}
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!4 = !{!"0x2e\00bar\00bar\00_Z3bari\001\000\001\000\006\00256\000\001", !1, !5, !6, null, i32 (i32)* @_Z3bari, null, null, !2} ; [ DW_TAG_subprogram ] [line 1] [def] [bar]
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!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/llvm_cmake_gcc/debug-loc-offset1.cc]
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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, !8}
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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 = !{!"0x11\004\00clang version 3.5.0 (210479)\000\00\000\00\001", !10, !2, !11, !13, !2, !2} ; [ DW_TAG_compile_unit ] [/llvm_cmake_gcc/debug-loc-offset2.cc] [DW_LANG_C_plus_plus]
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!10 = !{!"debug-loc-offset2.cc", !"/llvm_cmake_gcc"}
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!11 = !{!12}
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!12 = !{!"0x13\00A\001\000\000\000\004\000", !10, null, null, null, null, null, !"_ZTS1A"} ; [ DW_TAG_structure_type ] [A] [line 1, size 0, align 0, offset 0] [decl] [from ]
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!13 = !{!14}
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!14 = !{!"0x2e\00baz\00baz\00_Z3baz1A\006\000\001\000\006\00256\000\006", !10, !15, !16, null, void (%struct.A*)* @_Z3baz1A, null, null, !2} ; [ DW_TAG_subprogram ] [line 6] [def] [baz]
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!15 = !{!"0x29", !10} ; [ DW_TAG_file_type ] [/llvm_cmake_gcc/debug-loc-offset2.cc]
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!16 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !17, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!17 = !{null, !12}
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!18 = !{i32 2, !"Dwarf Version", i32 4}
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!19 = !{i32 2, !"Debug Info Version", i32 2}
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!20 = !{!"clang version 3.5.0 (210479)"}
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!21 = !{!"0x101\00b\0016777217\000", !4, !5, !8} ; [ DW_TAG_arg_variable ] [b] [line 1]
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!22 = !MDLocation(line: 1, scope: !4)
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!23 = !MDLocation(line: 2, scope: !4)
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!24 = !{!"0x101\00a\0016777222\000", !14, !15, !"_ZTS1A"} ; [ DW_TAG_arg_variable ] [a] [line 6]
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!25 = !MDLocation(line: 6, scope: !14)
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!26 = !{!"0x100\00z\007\000", !14, !15, !8} ; [ DW_TAG_auto_variable ] [z] [line 7]
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!27 = !MDLocation(line: 7, scope: !14)
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!28 = !MDLocation(line: 8, scope: !29)
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!29 = !{!"0xb\008\000\000", !10, !14} ; [ DW_TAG_lexical_block ] [/llvm_cmake_gcc/debug-loc-offset2.cc]
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!30 = !MDLocation(line: 9, scope: !29)
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!31 = !MDLocation(line: 10, scope: !32)
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!32 = !{!"0xb\0010\000\000", !10, !14} ; [ DW_TAG_lexical_block ] [/llvm_cmake_gcc/debug-loc-offset2.cc]
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!33 = !MDLocation(line: 11, scope: !32)
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!34 = !MDLocation(line: 12, scope: !14)
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