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https://github.com/RPCS3/llvm-mirror.git
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53320e0722
Summary: First up is instcombine, where in the dbg.declare -> dbg.value conversion, the llvm.dbg.value needs to be called on the actual loaded value, rather than the address (since the whole point of this transformation is to be able to get rid of the alloca). Further, now that that's cleaned up, we can remove a hack in the backend, that would add an implicit OP_deref if the argument to dbg.value was an alloca. This stems from before the existence of DIExpression and is no longer necessary since the deref can be expressed explicitly. Now, in order to make sure that the tests pass with this change, we need to correct the printing of DEBUG_VALUE comments to take into account the expression, which wasn't taken into account before. Unfortunately, for both these changes, there were a number of incorrect test cases (mostly the wrong number of DW_OP_derefs, but also a couple where the test itself was broken more badly). aprantl and I have gone through and adjusted these test case in order to make them pass with these fixes and in some cases to make sure they're actually testing what they are meant to test. Reviewers: aprantl Subscribers: dsanders Differential Revision: http://reviews.llvm.org/D14186 llvm-svn: 256077
112 lines
5.2 KiB
LLVM
112 lines
5.2 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+0]
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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: DIExpression(DW_OP_deref)
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define void @testVLAwithSize(i32 %s) nounwind uwtable ssp !dbg !5 {
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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 !DIExpression()), !dbg !11
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%0 = load i32, 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 !DIExpression()), !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, i32* %i, align 4, !dbg !21
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%4 = load i32, 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, i32* %i, align 4, !dbg !23
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%6 = load i32, 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, 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, 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, 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*, 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 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.2 (trunk 156005) (llvm/trunk 156000)", isOptimized: false, emissionKind: 1, file: !28, enums: !1, retainedTypes: !1, subprograms: !3, globals: !1, imports: !1)
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!1 = !{}
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!3 = !{!5}
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!5 = distinct !DISubprogram(name: "testVLAwithSize", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 2, file: !28, scope: !6, type: !7, variables: !1)
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!6 = !DIFile(filename: "bar.c", directory: "/Users/echristo/tmp")
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!7 = !DISubroutineType(types: !8)
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!8 = !{null, !9}
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!9 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!10 = !DILocalVariable(name: "s", line: 1, arg: 1, scope: !5, file: !6, type: !9)
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!11 = !DILocation(line: 1, column: 26, scope: !5)
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!12 = !DILocation(line: 3, column: 13, scope: !13)
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!13 = distinct !DILexicalBlock(line: 2, column: 1, file: !28, scope: !5)
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!14 = !DILocalVariable(name: "vla", line: 3, scope: !13, file: !6, type: !15)
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!15 = !DICompositeType(tag: DW_TAG_array_type, align: 32, baseType: !9, elements: !16)
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!16 = !{!17}
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!17 = !DISubrange(count: -1)
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!18 = !DILocation(line: 3, column: 7, scope: !13)
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!19 = !DILocalVariable(name: "i", line: 4, scope: !13, file: !6, type: !9)
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!20 = !DILocation(line: 4, column: 7, scope: !13)
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!21 = !DILocation(line: 5, column: 8, scope: !22)
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!22 = distinct !DILexicalBlock(line: 5, column: 3, file: !28, scope: !13)
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!23 = !DILocation(line: 6, column: 5, scope: !24)
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!24 = distinct !DILexicalBlock(line: 5, column: 27, file: !28, scope: !22)
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!25 = !DILocation(line: 7, column: 3, scope: !24)
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!26 = !DILocation(line: 5, column: 22, scope: !22)
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!27 = !DILocation(line: 8, column: 1, scope: !13)
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!28 = !DIFile(filename: "bar.c", directory: "/Users/echristo/tmp")
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!29 = !{i32 1, !"Debug Info Version", i32 3}
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!30 = !DIExpression(DW_OP_deref)
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