1 ; RUN: llc < %s -O0 -mtriple x86_64-apple-darwin 2 ; <rdar://problem/11134152> 3 4 define i32 @foo(i32* %x) nounwind uwtable ssp !dbg !5 { 5 entry: 6 %x.addr = alloca i32*, align 8 7 %saved_stack = alloca i8* 8 %cleanup.dest.slot = alloca i32 9 store i32* %x, i32** %x.addr, align 8 10 call void @llvm.dbg.declare(metadata i32** %x.addr, metadata !14, metadata !DIExpression()), !dbg !15 11 %0 = load i32*, i32** %x.addr, align 8, !dbg !16 12 %1 = load i32, i32* %0, align 4, !dbg !16 13 %2 = zext i32 %1 to i64, !dbg !16 14 %3 = call i8* @llvm.stacksave(), !dbg !16 15 store i8* %3, i8** %saved_stack, !dbg !16 16 %vla = alloca i8, i64 %2, align 16, !dbg !16 17 call void @llvm.dbg.declare(metadata i8* %vla, metadata !18, metadata !DIExpression()), !dbg !23 18 store i32 1, i32* %cleanup.dest.slot 19 %4 = load i8*, i8** %saved_stack, !dbg !24 20 call void @llvm.stackrestore(i8* %4), !dbg !24 21 ret i32 0, !dbg !25 22 } 23 24 declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone 25 26 declare i8* @llvm.stacksave() nounwind 27 28 declare void @llvm.stackrestore(i8*) nounwind 29 30 !llvm.dbg.cu = !{!0} 31 !llvm.module.flags = !{!27} 32 33 !0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.1 (trunk 153698)", isOptimized: false, emissionKind: FullDebug, file: !26, enums: !1, retainedTypes: !1, globals: !1) 34 !1 = !{} 35 !5 = distinct !DISubprogram(name: "foo", line: 6, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, file: !26, scope: !0, type: !7) 36 !6 = !DIFile(filename: "20020104-2.c", directory: "/Volumes/Sandbox/llvm") 37 !7 = !DISubroutineType(types: !8) 38 !8 = !{!9, !10} 39 !9 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 40 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !11) 41 !11 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !9) 42 !14 = !DILocalVariable(name: "x", line: 5, arg: 1, scope: !5, file: !6, type: !10) 43 !15 = !DILocation(line: 5, column: 21, scope: !5) 44 !16 = !DILocation(line: 7, column: 13, scope: !17) 45 !17 = distinct !DILexicalBlock(line: 6, column: 1, file: !26, scope: !5) 46 !18 = !DILocalVariable(name: "a", line: 7, scope: !17, file: !6, type: !19) 47 !19 = !DICompositeType(tag: DW_TAG_array_type, align: 8, baseType: !20, elements: !21) 48 !20 = !DIBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) 49 !21 = !{!22} 50 !22 = !DISubrange(count: -1) 51 !23 = !DILocation(line: 7, column: 8, scope: !17) 52 !24 = !DILocation(line: 9, column: 1, scope: !17) 53 !25 = !DILocation(line: 8, column: 3, scope: !17) 54 !26 = !DIFile(filename: "20020104-2.c", directory: "/Volumes/Sandbox/llvm") 55 !27 = !{i32 1, !"Debug Info Version", i32 3} 56
