1 ; ModuleID = 'array.c' 2 ; 3 ; From (clang -g -c -O1): 4 ; 5 ; void f(int* p) { 6 ; p[0] = 42; 7 ; } 8 ; 9 ; int main(int argc, char** argv) { 10 ; int array[4] = { 0, 1, 2, 3 }; 11 ; f(array); 12 ; return array[0]; 13 ; } 14 ; 15 ; RUN: llc -filetype=asm %s -o - | FileCheck %s 16 ; Test that we only emit register-indirect locations for the array array. 17 ; rdar://problem/14874886 18 ; 19 ; FIXME: If we described this location as RSP-relative instead of RDI-relative 20 ; the live range would be larger. 21 ; CHECK: ##DEBUG_VALUE: main:array <- [%RDI+0] 22 ; CHECK-NOT: ##DEBUG_VALUE: main:array <- %R{{.*}} 23 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 24 target triple = "x86_64-apple-macosx10.9.0" 25 26 @main.array = private unnamed_addr constant [4 x i32] [i32 0, i32 1, i32 2, i32 3], align 16 27 28 ; Function Attrs: nounwind ssp uwtable 29 define void @f(i32* nocapture %p) #0 !dbg !4 { 30 tail call void @llvm.dbg.value(metadata i32* %p, i64 0, metadata !11, metadata !DIExpression()), !dbg !28 31 store i32 42, i32* %p, align 4, !dbg !29, !tbaa !30 32 ret void, !dbg !34 33 } 34 35 ; Function Attrs: nounwind ssp uwtable 36 define i32 @main(i32 %argc, i8** nocapture readnone %argv) #0 !dbg !12 { 37 %array = alloca [4 x i32], align 16 38 tail call void @llvm.dbg.value(metadata i32 %argc, i64 0, metadata !19, metadata !DIExpression()), !dbg !35 39 tail call void @llvm.dbg.value(metadata i8** %argv, i64 0, metadata !20, metadata !DIExpression()), !dbg !35 40 tail call void @llvm.dbg.value(metadata [4 x i32]* %array, i64 0, metadata !21, metadata !DIExpression(DW_OP_deref)), !dbg !36 41 %1 = bitcast [4 x i32]* %array to i8*, !dbg !36 42 call void @llvm.memcpy.p0i8.p0i8.i64(i8* %1, i8* bitcast ([4 x i32]* @main.array to i8*), i64 16, i32 16, i1 false), !dbg !36 43 tail call void @llvm.dbg.value(metadata [4 x i32]* %array, i64 0, metadata !21, metadata !DIExpression(DW_OP_deref)), !dbg !36 44 %2 = getelementptr inbounds [4 x i32], [4 x i32]* %array, i64 0, i64 0, !dbg !37 45 call void @f(i32* %2), !dbg !37 46 tail call void @llvm.dbg.value(metadata [4 x i32]* %array, i64 0, metadata !21, metadata !DIExpression(DW_OP_deref)), !dbg !36 47 %3 = load i32, i32* %2, align 16, !dbg !38, !tbaa !30 48 ret i32 %3, !dbg !38 49 } 50 51 ; Function Attrs: nounwind 52 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1) #1 53 54 ; Function Attrs: nounwind readnone 55 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2 56 57 attributes #0 = { nounwind ssp uwtable } 58 attributes #1 = { nounwind } 59 attributes #2 = { nounwind readnone } 60 61 !llvm.dbg.cu = !{!0} 62 !llvm.module.flags = !{!25, !26} 63 !llvm.ident = !{!27} 64 65 !0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5.0 ", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2) 66 !1 = !DIFile(filename: "array.c", directory: "") 67 !2 = !{} 68 !4 = distinct !DISubprogram(name: "f", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 1, file: !1, scope: !5, type: !6, variables: !10) 69 !5 = !DIFile(filename: "array.c", directory: "") 70 !6 = !DISubroutineType(types: !7) 71 !7 = !{null, !8} 72 !8 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !9) 73 !9 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 74 !10 = !{!11} 75 !11 = !DILocalVariable(name: "p", line: 1, arg: 1, scope: !4, file: !5, type: !8) 76 !12 = distinct !DISubprogram(name: "main", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 5, file: !1, scope: !5, type: !13, variables: !18) 77 !13 = !DISubroutineType(types: !14) 78 !14 = !{!9, !9, !15} 79 !15 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !16) 80 !16 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !17) 81 !17 = !DIBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) 82 !18 = !{!19, !20, !21} 83 !19 = !DILocalVariable(name: "argc", line: 5, arg: 1, scope: !12, file: !5, type: !9) 84 !20 = !DILocalVariable(name: "argv", line: 5, arg: 2, scope: !12, file: !5, type: !15) 85 !21 = !DILocalVariable(name: "array", line: 6, scope: !12, file: !5, type: !22) 86 !22 = !DICompositeType(tag: DW_TAG_array_type, size: 128, align: 32, baseType: !9, elements: !23) 87 !23 = !{!24} 88 !24 = !DISubrange(count: 4) 89 !25 = !{i32 2, !"Dwarf Version", i32 2} 90 !26 = !{i32 1, !"Debug Info Version", i32 3} 91 !27 = !{!"clang version 3.5.0 "} 92 !28 = !DILocation(line: 1, scope: !4) 93 !29 = !DILocation(line: 2, scope: !4) 94 !30 = !{!31, !31, i64 0} 95 !31 = !{!"int", !32, i64 0} 96 !32 = !{!"omnipotent char", !33, i64 0} 97 !33 = !{!"Simple C/C++ TBAA"} 98 !34 = !DILocation(line: 3, scope: !4) 99 !35 = !DILocation(line: 5, scope: !12) 100 !36 = !DILocation(line: 6, scope: !12) 101 !37 = !DILocation(line: 7, scope: !12) 102 !38 = !DILocation(line: 8, scope: !12) 103
