1 ; RUN: llc -O0 -mtriple=x86_64-apple-darwin < %s -filetype=obj \ 2 ; RUN: | llvm-dwarfdump -v -debug-info - \ 3 ; RUN: | FileCheck %s -check-prefix=CHECK -check-prefix=DWARF4 4 ; RUN: llc -O0 -mtriple=x86_64-apple-darwin < %s -filetype=obj -dwarf-version=3 \ 5 ; RUN: | llvm-dwarfdump -v -debug-info - \ 6 ; RUN: | FileCheck %s -check-prefix=CHECK -check-prefix=DWARF3 7 8 ; DWARF4: DW_AT_location [DW_FORM_sec_offset] (0x00000000 9 ; DWARF4-NEXT: {{.*}}: DW_OP_breg2 RCX+0, DW_OP_deref 10 11 ; DWARF3: DW_AT_location [DW_FORM_data4] (0x00000000 12 ; DWARF3-NEXT: {{.*}}: DW_OP_breg2 RCX+0, DW_OP_deref 13 14 ; CHECK-NOT: DW_TAG 15 ; CHECK: DW_AT_name [DW_FORM_strp] ( .debug_str[0x00000067] = "vla") 16 17 ; Check the DEBUG_VALUE comments for good measure. 18 ; RUN: llc -O0 -mtriple=x86_64-apple-darwin %s -o - -filetype=asm | FileCheck %s -check-prefix=ASM-CHECK 19 ; vla should have a register-indirect address at one point. 20 ; ASM-CHECK: DEBUG_VALUE: vla <- [DW_OP_deref] [$rcx+0] 21 ; ASM-CHECK: DW_OP_breg2 22 23 ; RUN: llvm-as %s -o - | llvm-dis - | FileCheck %s --check-prefix=PRETTY-PRINT 24 ; PRETTY-PRINT: DIExpression(DW_OP_deref) 25 26 define void @testVLAwithSize(i32 %s) nounwind uwtable ssp !dbg !5 { 27 entry: 28 %s.addr = alloca i32, align 4 29 %saved_stack = alloca i8* 30 %i = alloca i32, align 4 31 store i32 %s, i32* %s.addr, align 4 32 call void @llvm.dbg.declare(metadata i32* %s.addr, metadata !10, metadata !DIExpression()), !dbg !11 33 %0 = load i32, i32* %s.addr, align 4, !dbg !12 34 %1 = zext i32 %0 to i64, !dbg !12 35 %2 = call i8* @llvm.stacksave(), !dbg !12 36 store i8* %2, i8** %saved_stack, !dbg !12 37 %vla = alloca i32, i64 %1, align 16, !dbg !12 38 call void @llvm.dbg.declare(metadata i32* %vla, metadata !14, metadata !30), !dbg !18 39 call void @llvm.dbg.declare(metadata i32* %i, metadata !19, metadata !DIExpression()), !dbg !20 40 store i32 0, i32* %i, align 4, !dbg !21 41 br label %for.cond, !dbg !21 42 43 for.cond: ; preds = %for.inc, %entry 44 %3 = load i32, i32* %i, align 4, !dbg !21 45 %4 = load i32, i32* %s.addr, align 4, !dbg !21 46 %cmp = icmp slt i32 %3, %4, !dbg !21 47 br i1 %cmp, label %for.body, label %for.end, !dbg !21 48 49 for.body: ; preds = %for.cond 50 %5 = load i32, i32* %i, align 4, !dbg !23 51 %6 = load i32, i32* %i, align 4, !dbg !23 52 %mul = mul nsw i32 %5, %6, !dbg !23 53 %7 = load i32, i32* %i, align 4, !dbg !23 54 %idxprom = sext i32 %7 to i64, !dbg !23 55 %arrayidx = getelementptr inbounds i32, i32* %vla, i64 %idxprom, !dbg !23 56 store i32 %mul, i32* %arrayidx, align 4, !dbg !23 57 br label %for.inc, !dbg !25 58 59 for.inc: ; preds = %for.body 60 %8 = load i32, i32* %i, align 4, !dbg !26 61 %inc = add nsw i32 %8, 1, !dbg !26 62 store i32 %inc, i32* %i, align 4, !dbg !26 63 br label %for.cond, !dbg !26 64 65 for.end: ; preds = %for.cond 66 %9 = load i8*, i8** %saved_stack, !dbg !27 67 call void @llvm.stackrestore(i8* %9), !dbg !27 68 ret void, !dbg !27 69 } 70 71 declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone 72 73 declare i8* @llvm.stacksave() nounwind 74 75 declare void @llvm.stackrestore(i8*) nounwind 76 77 !llvm.dbg.cu = !{!0} 78 !llvm.module.flags = !{!29} 79 80 !0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.2 (trunk 156005) (llvm/trunk 156000)", isOptimized: false, emissionKind: FullDebug, file: !28, enums: !1, retainedTypes: !1, globals: !1, imports: !1) 81 !1 = !{} 82 !5 = distinct !DISubprogram(name: "testVLAwithSize", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 2, file: !28, scope: !6, type: !7, retainedNodes: !1) 83 !6 = !DIFile(filename: "bar.c", directory: "/Users/echristo/tmp") 84 !7 = !DISubroutineType(types: !8) 85 !8 = !{null, !9} 86 !9 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 87 !10 = !DILocalVariable(name: "s", line: 1, arg: 1, scope: !5, file: !6, type: !9) 88 !11 = !DILocation(line: 1, column: 26, scope: !5) 89 !12 = !DILocation(line: 3, column: 13, scope: !13) 90 !13 = distinct !DILexicalBlock(line: 2, column: 1, file: !28, scope: !5) 91 !14 = !DILocalVariable(name: "vla", line: 3, scope: !13, file: !6, type: !15) 92 !15 = !DICompositeType(tag: DW_TAG_array_type, align: 32, baseType: !9, elements: !16) 93 !16 = !{!17} 94 !17 = !DISubrange(count: -1) 95 !18 = !DILocation(line: 3, column: 7, scope: !13) 96 !19 = !DILocalVariable(name: "i", line: 4, scope: !13, file: !6, type: !9) 97 !20 = !DILocation(line: 4, column: 7, scope: !13) 98 !21 = !DILocation(line: 5, column: 8, scope: !22) 99 !22 = distinct !DILexicalBlock(line: 5, column: 3, file: !28, scope: !13) 100 !23 = !DILocation(line: 6, column: 5, scope: !24) 101 !24 = distinct !DILexicalBlock(line: 5, column: 27, file: !28, scope: !22) 102 !25 = !DILocation(line: 7, column: 3, scope: !24) 103 !26 = !DILocation(line: 5, column: 22, scope: !22) 104 !27 = !DILocation(line: 8, column: 1, scope: !13) 105 !28 = !DIFile(filename: "bar.c", directory: "/Users/echristo/tmp") 106 !29 = !{i32 1, !"Debug Info Version", i32 3} 107 !30 = !DIExpression(DW_OP_deref) 108
