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1; RUN: llc -O2 %s -o %t -filetype=obj2; RUN: llvm-dwarfdump -debug-info %t | FileCheck %s3 4; Check that Machine CSE correctly handles during the transformation, the5; debug location information for variables.6 7; Generated with clang -c -g -O28 9; typedef float __attribute__((__vector_size__(16))) f4;10; f4 get();11; int main() {12; float MyVar = get()[0];13; if (MyVar)14; return 1;15; }16 17; ModuleID = 'test.cpp'18source_filename = "test.cpp"19target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"20target triple = "x86_64-pc-linux-gnu"21 22define dso_local i32 @main() !dbg !7 {23entry:24 %call = tail call <4 x float> @_Z3getv(), !dbg !1425 %vecext = extractelement <4 x float> %call, i32 0, !dbg !1426 call void @llvm.dbg.value(metadata float %vecext, metadata !12, metadata !DIExpression()), !dbg !1527 %tobool = fcmp une float %vecext, 0.000000e+00, !dbg !1628 %. = zext i1 %tobool to i32, !dbg !1829 ret i32 %., !dbg !1930}31 32declare dso_local <4 x float> @_Z3getv()33 34declare void @llvm.dbg.value(metadata, metadata, metadata) #235 36!llvm.dbg.cu = !{!0}37!llvm.module.flags = !{!3, !4, !5}38!llvm.ident = !{!6}39 40!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 8.0.0 (trunk 339665)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)41!1 = !DIFile(filename: "test.cpp", directory: ".")42!2 = !{}43!3 = !{i32 2, !"Dwarf Version", i32 4}44!4 = !{i32 2, !"Debug Info Version", i32 3}45!5 = !{i32 1, !"wchar_size", i32 4}46!6 = !{!"clang version 8.0.0 (trunk 339665)"}47!7 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 3, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)48!8 = !DISubroutineType(types: !9)49!9 = !{!10}50!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)51!11 = !{!12}52!12 = !DILocalVariable(name: "MyVar", scope: !7, file: !1, line: 4, type: !13)53!13 = !DIBasicType(name: "float", size: 32, encoding: DW_ATE_float)54!14 = !DILocation(line: 4, column: 18, scope: !7)55!15 = !DILocation(line: 4, column: 9, scope: !7)56!16 = !DILocation(line: 5, column: 7, scope: !17)57!17 = distinct !DILexicalBlock(scope: !7, file: !1, line: 5, column: 7)58!18 = !DILocation(line: 6, column: 5, scope: !17)59!19 = !DILocation(line: 7, column: 1, scope: !7)60 61; Look at the debug location information for variable 'MyVar'.62; Verify that we see a sequence of DI entries, that looks like:63; DW_TAG_variable64; DW_AT_location (0x0000000065; [0x0000000000000009, 0x0000000000000012): DW_OP_reg17 XMM0)66; DW_AT_name ("MyVar")67 68; CHECK-LABEL: DW_TAG_variable69; CHECK-NEXT: DW_AT_location{{.*}}70; CHECK-NEXT: {{.*}}DW_OP_reg17 XMM071; CHECK-NEXT: DW_AT_name{{.*}}("MyVar")72