1; RUN: opt -instcombine-lower-dbg-declare=0 < %s -passes=instcombine -S | FileCheck %s 2; RUN: opt -instcombine-lower-dbg-declare=1 < %s -passes=instcombine -S | FileCheck %s 3 4; RUN: opt -instcombine-lower-dbg-declare=0 < %s -passes=instcombine -S --try-experimental-debuginfo-iterators | FileCheck %s 5; RUN: opt -instcombine-lower-dbg-declare=1 < %s -passes=instcombine -S --try-experimental-debuginfo-iterators | FileCheck %s 6 7define i32 @foo(i32 %j) #0 !dbg !7 { 8entry: 9 %j.addr = alloca i32, align 4 10 store i32 %j, ptr %j.addr, align 4 11 call void @llvm.dbg.declare(metadata ptr %j.addr, metadata !11, metadata !12), !dbg !13 12 call void @llvm.dbg.value(metadata i32 10, metadata !16, metadata !12), !dbg !15 13 %0 = load i32, ptr %j.addr, align 4, !dbg !14 14 ret i32 %0, !dbg !15 15} 16 17; Instcombine can remove the alloca and forward the load to store, but it 18; should convert the declare to dbg value. 19; CHECK-LABEL: define i32 @foo(i32 %j) 20; CHECK-NOT: alloca 21; CHECK: #dbg_value(i32 %j, {{.*}}) 22; CHECK: #dbg_value(i32 10, {{.*}}) 23; CHECK: ret i32 %j 24 25declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 26declare void @llvm.dbg.value(metadata, metadata, metadata) #1 27 28!llvm.dbg.cu = !{!0} 29!llvm.module.flags = !{!3, !4, !5} 30!llvm.ident = !{!6} 31 32!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang 5.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug) 33!1 = !DIFile(filename: "a.c", directory: "/tmp") 34!2 = !{} 35!3 = !{i32 2, !"Dwarf Version", i32 4} 36!4 = !{i32 2, !"Debug Info Version", i32 3} 37!5 = !{i32 1, !"PIC Level", i32 2} 38!6 = !{!"clang version 5.0.0 (trunk 302918) (llvm/trunk 302925)"} 39!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) 40!8 = !DISubroutineType(types: !9) 41!9 = !{!10, !10} 42!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 43!11 = !DILocalVariable(name: "j", arg: 1, scope: !7, file: !1, line: 2, type: !10) 44!12 = !DIExpression() 45!13 = !DILocation(line: 2, column: 13, scope: !7) 46!14 = !DILocation(line: 5, column: 10, scope: !7) 47!15 = !DILocation(line: 5, column: 3, scope: !7) 48!16 = !DILocalVariable(name: "h", scope: !7, file: !1, line: 4, type: !10) 49