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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
112 lines
5.1 KiB
LLVM
112 lines
5.1 KiB
LLVM
; RUN: llc -O0 -mtriple=x86_64-apple-darwin < %s -filetype=obj \
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; RUN: | llvm-dwarfdump -debug-dump=info - \
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; RUN: | FileCheck %s -check-prefix=CHECK -check-prefix=DWARF4
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; RUN: llc -O0 -mtriple=x86_64-apple-darwin < %s -filetype=obj -dwarf-version=3 \
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; RUN: | llvm-dwarfdump -debug-dump=info - \
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; RUN: | FileCheck %s -check-prefix=CHECK -check-prefix=DWARF3
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; FIXME: The location here needs to be fixed, but llvm-dwarfdump doesn't handle
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; DW_AT_location lists yet.
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; DWARF4: DW_AT_location [DW_FORM_sec_offset] (0x00000000)
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; FIXME: The location here needs to be fixed, but llvm-dwarfdump doesn't handle
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; DW_AT_location lists yet.
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; DWARF3: DW_AT_location [DW_FORM_data4] (0x00000000)
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name [DW_FORM_strp] ( .debug_str[0x00000067] = "vla")
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; Unfortunately llvm-dwarfdump can't unparse a list of DW_AT_locations
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; right now, so we check the asm output:
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; RUN: llc -O0 -mtriple=x86_64-apple-darwin %s -o - -filetype=asm | FileCheck %s -check-prefix=ASM-CHECK
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; vla should have a register-indirect address at one point.
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; ASM-CHECK: DEBUG_VALUE: vla <- RCX
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; ASM-CHECK: DW_OP_breg2
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; RUN: llvm-as %s -o - | llvm-dis - | FileCheck %s --check-prefix=PRETTY-PRINT
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; PRETTY-PRINT: [ DW_TAG_expression ] [DW_OP_deref]
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define void @testVLAwithSize(i32 %s) nounwind uwtable ssp {
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entry:
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%s.addr = alloca i32, align 4
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%saved_stack = alloca i8*
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%i = alloca i32, align 4
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store i32 %s, i32* %s.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %s.addr, metadata !10, metadata !{!"0x102"}), !dbg !11
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%0 = load i32* %s.addr, align 4, !dbg !12
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%1 = zext i32 %0 to i64, !dbg !12
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%2 = call i8* @llvm.stacksave(), !dbg !12
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store i8* %2, i8** %saved_stack, !dbg !12
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%vla = alloca i32, i64 %1, align 16, !dbg !12
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call void @llvm.dbg.declare(metadata i32* %vla, metadata !14, metadata !30), !dbg !18
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call void @llvm.dbg.declare(metadata i32* %i, metadata !19, metadata !{!"0x102"}), !dbg !20
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store i32 0, i32* %i, align 4, !dbg !21
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br label %for.cond, !dbg !21
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for.cond: ; preds = %for.inc, %entry
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%3 = load i32* %i, align 4, !dbg !21
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%4 = load i32* %s.addr, align 4, !dbg !21
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%cmp = icmp slt i32 %3, %4, !dbg !21
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br i1 %cmp, label %for.body, label %for.end, !dbg !21
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for.body: ; preds = %for.cond
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%5 = load i32* %i, align 4, !dbg !23
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%6 = load i32* %i, align 4, !dbg !23
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%mul = mul nsw i32 %5, %6, !dbg !23
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%7 = load i32* %i, align 4, !dbg !23
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%idxprom = sext i32 %7 to i64, !dbg !23
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%arrayidx = getelementptr inbounds i32* %vla, i64 %idxprom, !dbg !23
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store i32 %mul, i32* %arrayidx, align 4, !dbg !23
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br label %for.inc, !dbg !25
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for.inc: ; preds = %for.body
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%8 = load i32* %i, align 4, !dbg !26
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%inc = add nsw i32 %8, 1, !dbg !26
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store i32 %inc, i32* %i, align 4, !dbg !26
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br label %for.cond, !dbg !26
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for.end: ; preds = %for.cond
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%9 = load i8** %saved_stack, !dbg !27
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call void @llvm.stackrestore(i8* %9), !dbg !27
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ret void, !dbg !27
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}
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declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
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declare i8* @llvm.stacksave() nounwind
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declare void @llvm.stackrestore(i8*) nounwind
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!29}
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!0 = !{!"0x11\0012\00clang version 3.2 (trunk 156005) (llvm/trunk 156000)\000\00\000\00\001", !28, !1, !1, !3, !1, !1} ; [ DW_TAG_compile_unit ]
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!1 = !{}
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!3 = !{!5}
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!5 = !{!"0x2e\00testVLAwithSize\00testVLAwithSize\00\001\000\001\000\006\00256\000\002", !28, !6, !7, null, void (i32)* @testVLAwithSize, null, null, !1} ; [ DW_TAG_subprogram ]
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!6 = !{!"0x29", !28} ; [ DW_TAG_file_type ]
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!7 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !8, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!8 = !{null, !9}
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!9 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ]
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!10 = !{!"0x101\00s\0016777217\000", !5, !6, !9} ; [ DW_TAG_arg_variable ]
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!11 = !MDLocation(line: 1, column: 26, scope: !5)
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!12 = !MDLocation(line: 3, column: 13, scope: !13)
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!13 = !{!"0xb\002\001\000", !28, !5} ; [ DW_TAG_lexical_block ]
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!14 = !{!"0x100\00vla\003\000", !13, !6, !15} ; [ DW_TAG_auto_variable ]
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!15 = !{!"0x1\00\000\000\0032\000\000", null, null, !9, !16, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 0, align 32, offset 0] [from int]
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!16 = !{!17}
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!17 = !{!"0x21\000\00-1"} ; [ DW_TAG_subrange_type ]
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!18 = !MDLocation(line: 3, column: 7, scope: !13)
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!19 = !{!"0x100\00i\004\000", !13, !6, !9} ; [ DW_TAG_auto_variable ]
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!20 = !MDLocation(line: 4, column: 7, scope: !13)
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!21 = !MDLocation(line: 5, column: 8, scope: !22)
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!22 = !{!"0xb\005\003\001", !28, !13} ; [ DW_TAG_lexical_block ]
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!23 = !MDLocation(line: 6, column: 5, scope: !24)
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!24 = !{!"0xb\005\0027\002", !28, !22} ; [ DW_TAG_lexical_block ]
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!25 = !MDLocation(line: 7, column: 3, scope: !24)
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!26 = !MDLocation(line: 5, column: 22, scope: !22)
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!27 = !MDLocation(line: 8, column: 1, scope: !13)
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!28 = !{!"bar.c", !"/Users/echristo/tmp"}
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!29 = !{i32 1, !"Debug Info Version", i32 2}
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!30 = !{!"0x102\006\006"} ; [ DW_TAG_expression ] [DW_OP_deref]
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