| ; RUN: llc -O0 -mtriple=x86_64-apple-darwin -filetype=asm %s -o - | FileCheck %s |
| ; Ensure that we generate an indirect location for the variable length array a. |
| ; CHECK: ##DEBUG_VALUE: vla:a <- [DW_OP_deref] [{{\$r[a-z]+}}+0] |
| ; CHECK: DW_OP_breg{{[0-9]}} |
| ; rdar://problem/13658587 |
| ; |
| ; generated from: |
| ; |
| ; int vla(int n) { |
| ; int a[n]; |
| ; a[0] = 42; |
| ; return a[n-1]; |
| ; } |
| ; |
| ; int main(int argc, char** argv) { |
| ; return vla(argc); |
| ; } |
| |
| ; ModuleID = 'vla.c' |
| target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" |
| target triple = "x86_64-apple-macosx10.8.0" |
| |
| ; Function Attrs: nounwind ssp uwtable |
| define i32 @vla(i32 %n) nounwind ssp uwtable !dbg !4 { |
| entry: |
| %n.addr = alloca i32, align 4 |
| %saved_stack = alloca i8* |
| %cleanup.dest.slot = alloca i32 |
| store i32 %n, i32* %n.addr, align 4 |
| call void @llvm.dbg.declare(metadata i32* %n.addr, metadata !15, metadata !DIExpression()), !dbg !16 |
| %0 = load i32, i32* %n.addr, align 4, !dbg !17 |
| %1 = zext i32 %0 to i64, !dbg !17 |
| %2 = call i8* @llvm.stacksave(), !dbg !17 |
| store i8* %2, i8** %saved_stack, !dbg !17 |
| %vla = alloca i32, i64 %1, align 16, !dbg !17 |
| call void @llvm.dbg.declare(metadata i32* %vla, metadata !18, metadata !DIExpression(DW_OP_deref)), !dbg !17 |
| %arrayidx = getelementptr inbounds i32, i32* %vla, i64 0, !dbg !22 |
| store i32 42, i32* %arrayidx, align 4, !dbg !22 |
| %3 = load i32, i32* %n.addr, align 4, !dbg !23 |
| %sub = sub nsw i32 %3, 1, !dbg !23 |
| %idxprom = sext i32 %sub to i64, !dbg !23 |
| %arrayidx1 = getelementptr inbounds i32, i32* %vla, i64 %idxprom, !dbg !23 |
| %4 = load i32, i32* %arrayidx1, align 4, !dbg !23 |
| store i32 1, i32* %cleanup.dest.slot |
| %5 = load i8*, i8** %saved_stack, !dbg !24 |
| call void @llvm.stackrestore(i8* %5), !dbg !24 |
| ret i32 %4, !dbg !23 |
| } |
| |
| ; Function Attrs: nounwind readnone |
| declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone |
| |
| ; Function Attrs: nounwind |
| declare i8* @llvm.stacksave() nounwind |
| |
| ; Function Attrs: nounwind |
| declare void @llvm.stackrestore(i8*) nounwind |
| |
| ; Function Attrs: nounwind ssp uwtable |
| define i32 @main(i32 %argc, i8** %argv) nounwind ssp uwtable !dbg !9 { |
| entry: |
| %retval = alloca i32, align 4 |
| %argc.addr = alloca i32, align 4 |
| %argv.addr = alloca i8**, align 8 |
| store i32 0, i32* %retval |
| store i32 %argc, i32* %argc.addr, align 4 |
| call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !25, metadata !DIExpression()), !dbg !26 |
| store i8** %argv, i8*** %argv.addr, align 8 |
| call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !27, metadata !DIExpression()), !dbg !26 |
| %0 = load i32, i32* %argc.addr, align 4, !dbg !28 |
| %call = call i32 @vla(i32 %0), !dbg !28 |
| ret i32 %call, !dbg !28 |
| } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!29} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.3 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2) |
| !1 = !DIFile(filename: "vla.c", directory: "") |
| !2 = !{} |
| !4 = distinct !DISubprogram(name: "vla", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 1, file: !1, scope: !5, type: !6, retainedNodes: !2) |
| !5 = !DIFile(filename: "vla.c", directory: "") |
| !6 = !DISubroutineType(types: !7) |
| !7 = !{!8, !8} |
| !8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) |
| !9 = distinct !DISubprogram(name: "main", line: 7, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 7, file: !1, scope: !5, type: !10, retainedNodes: !2) |
| !10 = !DISubroutineType(types: !11) |
| !11 = !{!8, !8, !12} |
| !12 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !13) |
| !13 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !14) |
| !14 = !DIBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) |
| !15 = !DILocalVariable(name: "n", line: 1, arg: 1, scope: !4, file: !5, type: !8) |
| !16 = !DILocation(line: 1, scope: !4) |
| !17 = !DILocation(line: 2, scope: !4) |
| !18 = !DILocalVariable(name: "a", line: 2, scope: !4, file: !5, type: !19) |
| !19 = !DICompositeType(tag: DW_TAG_array_type, align: 32, baseType: !8, elements: !20) |
| !20 = !{!21} |
| !21 = !DISubrange(count: -1) |
| !22 = !DILocation(line: 3, scope: !4) |
| !23 = !DILocation(line: 4, scope: !4) |
| !24 = !DILocation(line: 5, scope: !4) |
| !25 = !DILocalVariable(name: "argc", line: 7, arg: 1, scope: !9, file: !5, type: !8) |
| !26 = !DILocation(line: 7, scope: !9) |
| !27 = !DILocalVariable(name: "argv", line: 7, arg: 2, scope: !9, file: !5, type: !12) |
| !28 = !DILocation(line: 8, scope: !9) |
| !29 = !{i32 1, !"Debug Info Version", i32 3} |