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1; RUN: opt -instcombine-lower-dbg-declare=0 < %s -passes=instcombine -S | FileCheck %s2; RUN: opt -instcombine-lower-dbg-declare=1 < %s -passes=instcombine -S | FileCheck %s3 4 5define i32 @foo(i32 %j) #0 !dbg !7 {6entry:7 %j.addr = alloca i32, align 48 store i32 %j, ptr %j.addr, align 49 call void @llvm.dbg.declare(metadata ptr %j.addr, metadata !11, metadata !12), !dbg !1310 call void @llvm.dbg.value(metadata i32 10, metadata !16, metadata !12), !dbg !1511 %0 = load i32, ptr %j.addr, align 4, !dbg !1412 ret i32 %0, !dbg !1513}14 15; Instcombine can remove the alloca and forward the load to store, but it16; should convert the declare to dbg value.17; CHECK-LABEL: define i32 @foo(i32 %j)18; CHECK-NOT: alloca19; CHECK: #dbg_value(i32 %j, {{.*}})20; CHECK: #dbg_value(i32 10, {{.*}})21; CHECK: ret i32 %j22 23declare void @llvm.dbg.declare(metadata, metadata, metadata) #124declare void @llvm.dbg.value(metadata, metadata, metadata) #125 26!llvm.dbg.cu = !{!0}27!llvm.module.flags = !{!3, !4, !5}28!llvm.ident = !{!6}29 30!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang 5.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)31!1 = !DIFile(filename: "a.c", directory: "/tmp")32!2 = !{}33!3 = !{i32 2, !"Dwarf Version", i32 4}34!4 = !{i32 2, !"Debug Info Version", i32 3}35!5 = !{i32 1, !"PIC Level", i32 2}36!6 = !{!"clang version 5.0.0 (trunk 302918) (llvm/trunk 302925)"}37!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)38!8 = !DISubroutineType(types: !9)39!9 = !{!10, !10}40!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)41!11 = !DILocalVariable(name: "j", arg: 1, scope: !7, file: !1, line: 2, type: !10)42!12 = !DIExpression()43!13 = !DILocation(line: 2, column: 13, scope: !7)44!14 = !DILocation(line: 5, column: 10, scope: !7)45!15 = !DILocation(line: 5, column: 3, scope: !7)46!16 = !DILocalVariable(name: "h", scope: !7, file: !1, line: 4, type: !10)47