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https://github.com/RPCS3/llvm-mirror.git
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17584b9ad3
Use the range machinery for DW_AT_ranges and DW_AT_high/lo_pc.
This commit moves us from a single range per subprogram to extending
ranges if we are:
a) In the same section, and
b) In the same enclosing CU.
This means we have more fine grained ranges for compile units, and fewer
ranges overall when we have multiple functions in the same CU
adjacent to each other in the object file.
Also remove all of the earlier hacks around this functionality for
function sections etc. Also update all of the testcases to take into
account the merging functionality.
with a fix for location entries in the debug_loc section:
Make sure that debug loc entries are relative to the low_pc
of the compile unit. This means that when we only have a single
range that the offset should be just relative to the low_pc
of the unit, for multiple ranges for a CU this means that we'll be
relative to 0 which we emit along with DW_AT_ranges.
This mostly shows up with linked binaries, so add a testcase with
multiple CUs so that our location is going to be offset of a CU
with a non-zero low_pc.
llvm-svn: 204377
75 lines
3.9 KiB
LLVM
75 lines
3.9 KiB
LLVM
; REQUIRES: object-emission
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; RUN: %llc_dwarf -O0 -filetype=obj %s -o %t
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; RUN: llvm-dwarfdump %t | FileCheck %s
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; Check that we emit ranges for this CU since we have a function with and
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; without debug info.
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; Note: This depends upon the order of output in the .o file. Currently it's
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; in order of the output to make sure that the CU has multiple ranges since
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; there's a function in the middle. If they were together then it would have
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; a single range and no DW_AT_ranges.
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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_TAG_subprogram
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; Function Attrs: nounwind uwtable
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define i32 @b(i32 %c) #0 {
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entry:
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%c.addr = alloca i32, align 4
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store i32 %c, i32* %c.addr, align 4
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call void @llvm.dbg.declare(metadata !{i32* %c.addr}, metadata !13), !dbg !14
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%0 = load i32* %c.addr, align 4, !dbg !14
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%add = add nsw i32 %0, 1, !dbg !14
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ret i32 %add, !dbg !14
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}
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; Function Attrs: nounwind uwtable
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define i32 @a(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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%0 = load i32* %b.addr, align 4
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%add = add nsw i32 %0, 1
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ret i32 %add
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata) #1
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; Function Attrs: nounwind uwtable
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define i32 @d(i32 %e) #0 {
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entry:
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%e.addr = alloca i32, align 4
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store i32 %e, i32* %e.addr, align 4
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call void @llvm.dbg.declare(metadata !{i32* %e.addr}, metadata !15), !dbg !16
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%0 = load i32* %e.addr, align 4, !dbg !16
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%add = add nsw i32 %0, 1, !dbg !16
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ret i32 %add, !dbg !16
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}
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attributes #0 = { nounwind uwtable "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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!llvm.ident = !{!0, !0}
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!llvm.dbg.cu = !{!1}
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!llvm.module.flags = !{!11, !12}
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!0 = metadata !{metadata !"clang version 3.5.0 (trunk 204164) (llvm/trunk 204183)"}
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!1 = metadata !{i32 786449, metadata !2, i32 12, metadata !"clang version 3.5.0 (trunk 204164) (llvm/trunk 204183)", i1 false, metadata !"", i32 0, metadata !3, metadata !3, metadata !4, metadata !3, metadata !3, metadata !"", i32 1}
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!2 = metadata !{metadata !"b.c", metadata !"/usr/local/google/home/echristo"}
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!3 = metadata !{}
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!4 = metadata !{metadata !5, metadata !10}
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!5 = metadata !{i32 786478, metadata !2, metadata !6, metadata !"b", metadata !"b", metadata !"", i32 1, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @b, null, null, metadata !3, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [b]
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!6 = metadata !{i32 786473, metadata !2} ; [ DW_TAG_file_type ] [/usr/local/google/home/echristo/b.c]
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!7 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!8 = metadata !{metadata !9, metadata !9}
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!9 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
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!10 = metadata !{i32 786478, metadata !2, metadata !6, metadata !"d", metadata !"d", metadata !"", i32 3, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @d, null, null, metadata !3, i32 3} ; [ DW_TAG_subprogram ] [line 3] [def] [d]
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!11 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
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!12 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
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!13 = metadata !{i32 786689, metadata !5, metadata !"c", metadata !6, i32 16777217, metadata !9, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [c] [line 1]
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!14 = metadata !{i32 1, i32 0, metadata !5, null}
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!15 = metadata !{i32 786689, metadata !10, metadata !"e", metadata !6, i32 16777219, metadata !9, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [e] [line 3]
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!16 = metadata !{i32 3, i32 0, metadata !10, null}
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