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37ac8d3622
This commit moves `MDLocation`, finishing off PR21433. There's an
accompanying clang commit for frontend testcases. I'll attach the
testcase upgrade script I used to PR21433 to help out-of-tree
frontends/backends.
This changes the schema for `DebugLoc` and `DILocation` from:
!{i32 3, i32 7, !7, !8}
to:
!MDLocation(line: 3, column: 7, scope: !7, inlinedAt: !8)
Note that empty fields (line/column: 0 and inlinedAt: null) don't get
printed by the assembly writer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226048 91177308-0d34-0410-b5e6-96231b3b80d8
106 lines
5.5 KiB
LLVM
106 lines
5.5 KiB
LLVM
; REQUIRES: object-emission
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; RUN: llc -mtriple=x86_64-apple-macosx10.10.0 -o %t %s
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; Testcase generated from:
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; #include <stdint.h>
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; int foo(int a) {
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; int b = (int16_t)a + 8;
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; int c = (int16_t)b + 8;
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; int d = (int16_t)c + 8;
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; int e = (int16_t)d + 8;
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; int f = (int16_t)e + 8;
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; return f;
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; }
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; by emitting the IR and then manually applying mem2reg to it.
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; This testcase would trigger the assert commited along with it if the
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; fix of r221709 isn't applied. There is no other check except the successful
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; run of llc.
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; What happened before r221709, is that SDDbgInfo (the data structure helping
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; SelectionDAG to keep track of dbg.values) kept a map keyed by SDNode pointers.
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; This map was never purged when the SDNodes were deallocated and thus if a new
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; SDNode was allocated in the same memory, it would have an entry in the SDDbgInfo
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; map upon creation (Reallocation in the same memory can happen easily as
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; SelectionDAG uses a Recycling allocator). This behavior could turn into a
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; pathological memory consumption explosion if the DAG combiner hit the 'right'
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; allocation patterns as could be seen in PR20893.
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; By nature, this test could bitrot quite easily. If it doesn't trigger an assert
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; when run with r221709 reverted, then it really doesn't test anything anymore.
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; Function Attrs: nounwind ssp uwtable
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define i32 @foo(i32 %a) #0 {
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entry:
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call void @llvm.dbg.value(metadata i32 %a, i64 0, metadata !16, metadata !17), !dbg !18
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%conv = trunc i32 %a to i16, !dbg !19
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%conv1 = sext i16 %conv to i32, !dbg !19
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%add = add nsw i32 %conv1, 8, !dbg !19
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call void @llvm.dbg.value(metadata i32 %add, i64 0, metadata !20, metadata !17), !dbg !21
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%conv2 = trunc i32 %add to i16, !dbg !22
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%conv3 = sext i16 %conv2 to i32, !dbg !22
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%add4 = add nsw i32 %conv3, 8, !dbg !22
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call void @llvm.dbg.value(metadata i32 %add4, i64 0, metadata !23, metadata !17), !dbg !24
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%conv5 = trunc i32 %add4 to i16, !dbg !25
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%conv6 = sext i16 %conv5 to i32, !dbg !25
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%add7 = add nsw i32 %conv6, 8, !dbg !25
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call void @llvm.dbg.value(metadata i32 %add7, i64 0, metadata !26, metadata !17), !dbg !27
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%conv8 = trunc i32 %add7 to i16, !dbg !28
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%conv9 = sext i16 %conv8 to i32, !dbg !28
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%add10 = add nsw i32 %conv9, 8, !dbg !28
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call void @llvm.dbg.value(metadata i32 %add10, i64 0, metadata !29, metadata !17), !dbg !30
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%conv11 = trunc i32 %add10 to i16, !dbg !31
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%conv12 = sext i16 %conv11 to i32, !dbg !31
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%add13 = add nsw i32 %conv12, 8, !dbg !31
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call void @llvm.dbg.value(metadata i32 %add13, i64 0, metadata !32, metadata !17), !dbg !33
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ret i32 %add13, !dbg !34
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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 ssp 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.dbg.cu = !{!0}
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!llvm.module.flags = !{!13, !14}
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!llvm.ident = !{!15}
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!0 = !{!"0x11\0012\00clang version 3.6.0 \000\00\000\00\001", !1, !2, !3, !7, !2, !2} ; [ DW_TAG_compile_unit ] [/tmp/ghost-sdnode-dbgvalues.c] [DW_LANG_C99]
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!1 = !{!"ghost-sdnode-dbgvalues.c", !"/tmp"}
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!2 = !{}
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!3 = !{!4}
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!4 = !{!"0x16\00int16_t\0030\000\000\000\000", !5, null, !6} ; [ DW_TAG_typedef ] [int16_t] [line 30, size 0, align 0, offset 0] [from short]
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!5 = !{!"/usr/include/sys/_types/_int16_t.h", !"/tmp"}
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!6 = !{!"0x24\00short\000\0016\0016\000\000\005", null, null} ; [ DW_TAG_base_type ] [short] [line 0, size 16, align 16, offset 0, enc DW_ATE_signed]
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!7 = !{!8}
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!8 = !{!"0x2e\00foo\00foo\00\003\000\001\000\000\00256\000\003", !1, !9, !10, null, i32 (i32)* @foo, null, null, !2} ; [ DW_TAG_subprogram ] [line 3] [def] [foo]
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!9 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/tmp/ghost-sdnode-dbgvalues.c]
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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 = !{!12, !12}
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!12 = !{!"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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!13 = !{i32 2, !"Dwarf Version", i32 2}
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!14 = !{i32 2, !"Debug Info Version", i32 2}
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!15 = !{!"clang version 3.6.0 "}
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!16 = !{!"0x101\00a\0016777219\000", !8, !9, !12} ; [ DW_TAG_arg_variable ] [a] [line 3]
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!17 = !{!"0x102"} ; [ DW_TAG_expression ]
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!18 = !MDLocation(line: 3, column: 13, scope: !8)
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!19 = !MDLocation(line: 4, column: 5, scope: !8)
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!20 = !{!"0x100\00b\004\000", !8, !9, !12} ; [ DW_TAG_auto_variable ] [b] [line 4]
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!21 = !MDLocation(line: 4, column: 9, scope: !8)
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!22 = !MDLocation(line: 5, column: 5, scope: !8)
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!23 = !{!"0x100\00c\005\000", !8, !9, !12} ; [ DW_TAG_auto_variable ] [c] [line 5]
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!24 = !MDLocation(line: 5, column: 9, scope: !8)
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!25 = !MDLocation(line: 6, column: 5, scope: !8)
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!26 = !{!"0x100\00d\006\000", !8, !9, !12} ; [ DW_TAG_auto_variable ] [d] [line 6]
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!27 = !MDLocation(line: 6, column: 9, scope: !8)
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!28 = !MDLocation(line: 7, column: 5, scope: !8)
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!29 = !{!"0x100\00e\007\000", !8, !9, !12} ; [ DW_TAG_auto_variable ] [e] [line 7]
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!30 = !MDLocation(line: 7, column: 9, scope: !8)
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!31 = !MDLocation(line: 8, column: 5, scope: !8)
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!32 = !{!"0x100\00f\008\000", !8, !9, !12} ; [ DW_TAG_auto_variable ] [f] [line 8]
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!33 = !MDLocation(line: 8, column: 9, scope: !8)
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!34 = !MDLocation(line: 9, column: 5, scope: !8)
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