1; RUN: llc < %s -march=x86-64 -mtriple=x86_64-unknown-unknown -mcpu=generic | FileCheck %s 2; Both functions should produce the same code. The presence of debug values 3; should not affect the scheduling strategy. 4; Generated from: 5; char argc; 6; class C { 7; public: 8; int test(char ,char ,char ,...); 9; }; 10; void foo() { 11; C c; 12; char lc = argc; 13; c.test(0,argc,0,lc); 14; c.test(0,argc,0,lc); 15; } 16; 17; with 18; clang -O2 -c test.cpp -emit-llvm -S 19; clang -O2 -c test.cpp -emit-llvm -S -g 20; 21 22 23%class.C = type { i8 } 24 25@argc = global i8 0, align 1 26 27declare i32 @test_function(%class.C*, i8 signext, i8 signext, i8 signext, ...) 28 29; CHECK-LABEL: test_without_debug 30; CHECK: movl [[A:%[a-z]+]], [[B:%[a-z]+]] 31; CHECK-NEXT: movl [[A]], [[C:%[a-z]+]] 32define void @test_without_debug() { 33entry: 34 %c = alloca %class.C, align 1 35 %0 = load i8, i8* @argc, align 1 36 %conv = sext i8 %0 to i32 37 %call = call i32 (%class.C*, i8, i8, i8, ...) @test_function(%class.C* %c, i8 signext 0, i8 signext %0, i8 signext 0, i32 %conv) 38 %1 = load i8, i8* @argc, align 1 39 %call2 = call i32 (%class.C*, i8, i8, i8, ...) @test_function(%class.C* %c, i8 signext 0, i8 signext %1, i8 signext 0, i32 %conv) 40 ret void 41} 42 43; CHECK-LABEL: test_with_debug 44; CHECK: movl [[A]], [[B]] 45; CHECK-NEXT: movl [[A]], [[C]] 46define void @test_with_debug() !dbg !13 { 47entry: 48 %c = alloca %class.C, align 1 49 %0 = load i8, i8* @argc, align 1 50 tail call void @llvm.dbg.value(metadata i8 %0, i64 0, metadata !19, metadata !29), !dbg !DILocation(scope: !13) 51 %conv = sext i8 %0 to i32 52 tail call void @llvm.dbg.value(metadata %class.C* %c, i64 0, metadata !18, metadata !29), !dbg !DILocation(scope: !13) 53 %call = call i32 (%class.C*, i8, i8, i8, ...) @test_function(%class.C* %c, i8 signext 0, i8 signext %0, i8 signext 0, i32 %conv) 54 %1 = load i8, i8* @argc, align 1 55 call void @llvm.dbg.value(metadata %class.C* %c, i64 0, metadata !18, metadata !29), !dbg !DILocation(scope: !13) 56 %call2 = call i32 (%class.C*, i8, i8, i8, ...) @test_function(%class.C* %c, i8 signext 0, i8 signext %1, i8 signext 0, i32 %conv) 57 ret void 58} 59 60declare void @llvm.dbg.value(metadata, i64, metadata, metadata) 61 62!llvm.dbg.cu = !{!0} 63!llvm.module.flags = !{!22, !23} 64 65!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, enums: !2, retainedTypes: !3, subprograms: !12, globals: !20, imports: !2) 66!1 = !DIFile(filename: "test.cpp", directory: "") 67!2 = !{} 68!3 = !{!4} 69!4 = !DICompositeType(tag: DW_TAG_class_type, name: "C", line: 2, size: 8, align: 8, file: !1, elements: !5, identifier: "_ZTS1C") 70!5 = !{!6} 71!6 = !DISubprogram(name: "test", file: !1, scope: !"_ZTS1C", type: !7, isDefinition: false) 72!7 = !DISubroutineType(types: !8) 73!8 = !{!9, !10, !11, !11, !11, null} 74!9 = !DIBasicType(encoding: DW_ATE_signed, size: 32, align: 32, name: "int") 75!10 = !DIDerivedType(baseType: !"_ZTS1C", tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial) 76!11 = !DIBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) 77!12 = !{!13} 78!13 = distinct !DISubprogram(name: "test_with_debug", linkageName: "test_with_debug", line: 6, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 6, file: !1, scope: !14, type: !15, variables: !17) 79!14 = !DIFile(filename: "test.cpp", directory: "") 80!15 = !DISubroutineType(types: !16) 81!16 = !{null} 82!17 = !{!18, !19} 83!18 = !DILocalVariable(name: "c", line: 7, scope: !13, file: !14, type: !"_ZTS1C") 84!19 = !DILocalVariable(name: "lc", line: 8, scope: !13, file: !14, type: !11) 85!20 = !{!21} 86!21 = !DIGlobalVariable(name: "argc", line: 1, isLocal: false, isDefinition: true, scope: null, file: !14, type: !11, variable: i8* @argc) 87!22 = !{i32 2, !"Dwarf Version", i32 4} 88!23 = !{i32 2, !"Debug Info Version", i32 3} 89!25 = !DILocation(line: 8, column: 3, scope: !13) 90!29 = !DIExpression() 91