| ; RUN: llc -O3 -verify-machineinstrs -mtriple=aarch64-none-linux-gnu -print-after virtregrewriter < %s >%t 2>&1 && FileCheck <%t %s |
| |
| ; This test checks that DBG_VALUE instruction placed correctly. |
| ; Specifically: if Register Allocator inserts additional instructions |
| ; in the beginning of basic block then it should not break placement |
| ; of DBG_VALUE for loop index variable. That DBG_VALUE instruction |
| ; for "i" variable should be placed before any real loop instruction. |
| ; https://reviews.llvm.org/D62650 |
| |
| ; Created from the following C source: |
| |
| ; cat test_debug_val.cpp |
| ; |
| ; void func(int, ...); |
| ; |
| ; int array[0x100]; |
| ; |
| ; int main( int argc, char **argv ) |
| ; { |
| ; int var = 56; |
| ; |
| ; int a1 = array[1]; int a2 = array[2]; int a3 = array[3]; int a4 = array[4]; |
| ; int a5 = array[5]; int a6 = array[6]; int a7 = array[7]; int a8 = array[8]; |
| ; int a9 = array[9]; int a10 = array[10]; |
| ; |
| ; for( int i = 0; i < 0x100; i++ ) { |
| ; |
| ; array[i] = var; |
| ; |
| ; func(0, i, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10 ); |
| ; } |
| ; |
| ; return 0; |
| ; } |
| ; |
| ; |
| ; clang -O3 -g -c --target=aarch64-unknown-linux -std=gnu++14 test_debug_val.cpp -emit-llvm -S -o - |
| |
| |
| ; CHECK: bb.2.for.body |
| ; CHECK-NEXT: predecessors |
| ; CHECK-NEXT: successors |
| ; CHECK-NEXT: liveins |
| ; CHECK-NOT: MOV |
| ; CHECK: DBG_VALUE $[[REG:[xw][0-9]+]], $noreg, !"i" |
| ; CHECK: MOV |
| |
| ; ModuleID = 'test_debug_val.cpp' |
| source_filename = "test_debug_val.cpp" |
| target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128" |
| target triple = "aarch64-unknown-linux" |
| |
| @array = dso_local local_unnamed_addr global [256 x i32] zeroinitializer, align 4, !dbg !0 |
| |
| ; Function Attrs: norecurse |
| define dso_local i32 @main(i32 %argc, i8** nocapture readnone %argv) local_unnamed_addr #0 !dbg !14 { |
| entry: |
| call void @llvm.dbg.value(metadata i32 %argc, metadata !21, metadata !DIExpression()), !dbg !36 |
| call void @llvm.dbg.value(metadata i8** %argv, metadata !22, metadata !DIExpression()), !dbg !36 |
| call void @llvm.dbg.value(metadata i32 56, metadata !23, metadata !DIExpression()), !dbg !36 |
| %0 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 1), align 4, !dbg !37 |
| call void @llvm.dbg.value(metadata i32 %0, metadata !24, metadata !DIExpression()), !dbg !36 |
| %1 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 2), align 4, !dbg !42 |
| call void @llvm.dbg.value(metadata i32 %1, metadata !25, metadata !DIExpression()), !dbg !36 |
| %2 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 3), align 4, !dbg !43 |
| call void @llvm.dbg.value(metadata i32 %2, metadata !26, metadata !DIExpression()), !dbg !36 |
| %3 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 4), align 4, !dbg !44 |
| call void @llvm.dbg.value(metadata i32 %3, metadata !27, metadata !DIExpression()), !dbg !36 |
| %4 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 5), align 4, !dbg !45 |
| call void @llvm.dbg.value(metadata i32 %4, metadata !28, metadata !DIExpression()), !dbg !36 |
| %5 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 6), align 4, !dbg !46 |
| call void @llvm.dbg.value(metadata i32 %5, metadata !29, metadata !DIExpression()), !dbg !36 |
| %6 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 7), align 4, !dbg !47 |
| call void @llvm.dbg.value(metadata i32 %6, metadata !30, metadata !DIExpression()), !dbg !36 |
| %7 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 8), align 4, !dbg !48 |
| call void @llvm.dbg.value(metadata i32 %7, metadata !31, metadata !DIExpression()), !dbg !36 |
| %8 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 9), align 4, !dbg !49 |
| call void @llvm.dbg.value(metadata i32 %8, metadata !32, metadata !DIExpression()), !dbg !36 |
| %9 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 10), align 4, !dbg !50 |
| call void @llvm.dbg.value(metadata i32 %9, metadata !33, metadata !DIExpression()), !dbg !36 |
| call void @llvm.dbg.value(metadata i32 0, metadata !34, metadata !DIExpression()), !dbg !51 |
| br label %for.body, !dbg !52 |
| |
| for.cond.cleanup: ; preds = %for.body |
| ret i32 0, !dbg !53 |
| |
| for.body: ; preds = %for.body, %entry |
| %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] |
| call void @llvm.dbg.value(metadata i64 %indvars.iv, metadata !34, metadata !DIExpression()), !dbg !51 |
| %arrayidx = getelementptr inbounds [256 x i32], [256 x i32]* @array, i64 0, i64 %indvars.iv, !dbg !54 |
| store i32 56, i32* %arrayidx, align 4, !dbg !57 |
| %10 = trunc i64 %indvars.iv to i32, !dbg !58 |
| tail call void (i32, ...) @_Z4funciz(i32 0, i32 %10, i32 %0, i32 %1, i32 %2, i32 %3, i32 %4, i32 %5, i32 %6, i32 %7, i32 %8, i32 %9), !dbg !58 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !59 |
| call void @llvm.dbg.value(metadata i32 undef, metadata !34, metadata !DIExpression(DW_OP_plus_uconst, 1, DW_OP_stack_value)), !dbg !51 |
| %exitcond = icmp eq i64 %indvars.iv.next, 256, !dbg !60 |
| br i1 %exitcond, label %for.cond.cleanup, label %for.body, !dbg !52, !llvm.loop !61 |
| } |
| |
| declare dso_local void @_Z4funciz(i32, ...) local_unnamed_addr #1 |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #2 |
| |
| attributes #0 = { nounwind uwtable } |
| attributes #1 = { nounwind uwtable } |
| attributes #2 = { nounwind readnone speculatable } |
| |
| !llvm.dbg.cu = !{!2} |
| !llvm.module.flags = !{!10, !11, !12} |
| !llvm.ident = !{!13} |
| |
| !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) |
| !1 = distinct !DIGlobalVariable(name: "array", scope: !2, file: !3, line: 4, type: !6, isLocal: false, isDefinition: true) |
| !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 9.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None) |
| !3 = !DIFile(filename: "test_debug_val.cpp", directory: "") |
| !4 = !{} |
| !5 = !{!0} |
| !6 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, size: 8192, elements: !8) |
| !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !8 = !{!9} |
| !9 = !DISubrange(count: 256) |
| !10 = !{i32 2, !"Dwarf Version", i32 4} |
| !11 = !{i32 2, !"Debug Info Version", i32 3} |
| !12 = !{i32 1, !"wchar_size", i32 4} |
| !13 = !{!"clang version 9.0.0 "} |
| !14 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 6, type: !15, scopeLine: 7, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !20) |
| !15 = !DISubroutineType(types: !16) |
| !16 = !{!7, !7, !17} |
| !17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64) |
| !18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64) |
| !19 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_unsigned_char) |
| !20 = !{!21, !22, !23, !24, !25, !26, !27, !28, !29, !30, !31, !32, !33, !34} |
| !21 = !DILocalVariable(name: "argc", arg: 1, scope: !14, file: !3, line: 6, type: !7) |
| !22 = !DILocalVariable(name: "argv", arg: 2, scope: !14, file: !3, line: 6, type: !17) |
| !23 = !DILocalVariable(name: "var", scope: !14, file: !3, line: 8, type: !7) |
| !24 = !DILocalVariable(name: "a1", scope: !14, file: !3, line: 10, type: !7) |
| !25 = !DILocalVariable(name: "a2", scope: !14, file: !3, line: 10, type: !7) |
| !26 = !DILocalVariable(name: "a3", scope: !14, file: !3, line: 10, type: !7) |
| !27 = !DILocalVariable(name: "a4", scope: !14, file: !3, line: 10, type: !7) |
| !28 = !DILocalVariable(name: "a5", scope: !14, file: !3, line: 11, type: !7) |
| !29 = !DILocalVariable(name: "a6", scope: !14, file: !3, line: 11, type: !7) |
| !30 = !DILocalVariable(name: "a7", scope: !14, file: !3, line: 11, type: !7) |
| !31 = !DILocalVariable(name: "a8", scope: !14, file: !3, line: 11, type: !7) |
| !32 = !DILocalVariable(name: "a9", scope: !14, file: !3, line: 12, type: !7) |
| !33 = !DILocalVariable(name: "a10", scope: !14, file: !3, line: 12, type: !7) |
| !34 = !DILocalVariable(name: "i", scope: !35, file: !3, line: 14, type: !7) |
| !35 = distinct !DILexicalBlock(scope: !14, file: !3, line: 14, column: 4) |
| !36 = !DILocation(line: 0, scope: !14) |
| !37 = !DILocation(line: 10, column: 13, scope: !14) |
| !42 = !DILocation(line: 10, column: 32, scope: !14) |
| !43 = !DILocation(line: 10, column: 51, scope: !14) |
| !44 = !DILocation(line: 10, column: 70, scope: !14) |
| !45 = !DILocation(line: 11, column: 13, scope: !14) |
| !46 = !DILocation(line: 11, column: 32, scope: !14) |
| !47 = !DILocation(line: 11, column: 51, scope: !14) |
| !48 = !DILocation(line: 11, column: 70, scope: !14) |
| !49 = !DILocation(line: 12, column: 13, scope: !14) |
| !50 = !DILocation(line: 12, column: 33, scope: !14) |
| !51 = !DILocation(line: 0, scope: !35) |
| !52 = !DILocation(line: 14, column: 4, scope: !35) |
| !53 = !DILocation(line: 21, column: 4, scope: !14) |
| !54 = !DILocation(line: 16, column: 8, scope: !55) |
| !55 = distinct !DILexicalBlock(scope: !56, file: !3, line: 14, column: 37) |
| !56 = distinct !DILexicalBlock(scope: !35, file: !3, line: 14, column: 4) |
| !57 = !DILocation(line: 16, column: 17, scope: !55) |
| !58 = !DILocation(line: 18, column: 8, scope: !55) |
| !59 = !DILocation(line: 14, column: 32, scope: !56) |
| !60 = !DILocation(line: 14, column: 22, scope: !56) |
| !61 = distinct !{!61, !52, !62} |
| !62 = !DILocation(line: 19, column: 4, scope: !35) |