1 ; RUN: opt -S -strip-debug -globals-aa -instcombine < %s | FileCheck %s 2 ; RUN: opt -S -globals-aa -instcombine < %s | FileCheck %s 3 4 ; Having debug info around shouldn't affect what globals-aa and instcombine do. 5 6 @g = global i8 0 7 8 define void @bar(i8 %p) { 9 call void @llvm.dbg.value(metadata i64 0, metadata !14, metadata !DIExpression()), !dbg !15 10 ret void 11 } 12 13 declare void @gaz(i8 %p) 14 15 define void @foo() { 16 store i8 42, i8* @g, align 1 17 call void @bar(i8 1) 18 %_tmp = load i8, i8* @g, align 1 19 call void @gaz(i8 %_tmp) 20 ret void 21 } 22 23 ; Function Attrs: nounwind readnone speculatable 24 declare void @llvm.dbg.value(metadata, metadata, metadata) #0 25 26 attributes #0 = { nounwind readnone speculatable } 27 28 !llvm.dbg.cu = !{!5} 29 !llvm.module.flags = !{!8, !9} 30 !llvm.ident = !{!10} 31 32 !0 = !DIFile(filename: "foo.c", directory: "/tmp") 33 !1 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint64_t", file: !2, line: 77, baseType: !3) 34 !2 = !DIFile(filename: "foo.h", directory: "/tmp") 35 !3 = !DIDerivedType(tag: DW_TAG_typedef, name: "__u64_t", file: !0, baseType: !4) 36 !4 = !DIBasicType(name: "unsigned long long", size: 64, encoding: DW_ATE_unsigned) 37 !5 = distinct !DICompileUnit(language: DW_LANG_C, file: !0, producer: "My Compiler", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !6, retainedTypes: !6, globals: !7) 38 !6 = !{} 39 !7 = !{} 40 !8 = !{i32 2, !"Dwarf Version", i32 4} 41 !9 = !{i32 2, !"Debug Info Version", i32 3} 42 !10 = !{!"My Compiler"} 43 !11 = distinct !DISubprogram(name: "func_5", scope: !0, file: !0, line: 117, type: !12, isLocal: true, isDefinition: true, scopeLine: 118, isOptimized: false, unit: !5, retainedNodes: !6) 44 !12 = !DISubroutineType(types: !13) 45 !13 = !{} 46 !14 = !DILocalVariable(name: "p_6", arg: 1, scope: !11, line: 117, type: !1) 47 !15 = !DILocation(line: 117, column: 34, scope: !11) 48 49 ; instcombine should realize that the load will read 42 from g and pass 42 to 50 ; gaz regardless of the dbg.value in bar. 51 52 ; CHECK: define void @foo() { 53 ; CHECK-NEXT: store i8 42, i8* @g, align 1 54 ; CHECK-NEXT: call void @bar(i8 1) 55 ; CHECK-NEXT: call void @gaz(i8 42) 56 ; CHECK-NEXT: ret void 57 58
