1 ; RUN: opt < %s -licm -pass-remarks=licm -o /dev/null 2>&1 | FileCheck %s 2 ; RUN: opt -aa-pipeline=basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,require<opt-remark-emit>,loop(licm)' %s -o /dev/null -pass-remarks=licm 2>&1 | FileCheck %s 3 target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128" 4 5 define void @hoist(i32* %array, i32* noalias %p) { 6 Entry: 7 br label %Loop 8 9 Loop: 10 %j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] 11 %addr = getelementptr i32, i32* %array, i32 %j 12 %a = load i32, i32* %addr 13 ; CHECK: remark: /tmp/kk.c:2:20: hoisting load 14 %b = load i32, i32* %p, !dbg !8 15 %a2 = add i32 %a, %b 16 store i32 %a2, i32* %addr 17 %Next = add i32 %j, 1 18 %cond = icmp eq i32 %Next, 0 19 br i1 %cond, label %Out, label %Loop 20 21 Out: 22 ret void 23 } 24 25 define i32 @sink(i32* %array, i32* noalias %p, i32 %b) { 26 Entry: 27 br label %Loop 28 29 Loop: 30 %j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] 31 %addr = getelementptr i32, i32* %array, i32 %j 32 %a = load i32, i32* %addr 33 %a2 = add i32 %a, %b 34 store i32 %a2, i32* %addr 35 ; CHECK: remark: /tmp/kk.c:2:21: sinking add 36 %a3 = add i32 %a, 1, !dbg !9 37 %Next = add i32 %j, 1 38 %cond = icmp eq i32 %Next, 0 39 br i1 %cond, label %Out, label %Loop 40 41 Out: 42 %a4 = phi i32 [ %a3, %Loop ] 43 ret i32 %a4 44 } 45 46 define void @promote(i32* %array, i32* noalias %p) { 47 Entry: 48 br label %Loop 49 50 Loop: 51 %j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] 52 %addr = getelementptr i32, i32* %array, i32 %j 53 %a = load i32, i32* %addr 54 %b = load i32, i32* %p 55 %a2 = add i32 %a, %b 56 store i32 %a2, i32* %addr 57 ; CHECK: remark: /tmp/kk.c:2:22: Moving accesses to memory location out of the loop 58 store i32 %b, i32* %p, !dbg !10 59 %Next = add i32 %j, 1 60 %cond = icmp eq i32 %Next, 0 61 br i1 %cond, label %Out, label %Loop 62 63 Out: 64 ret void 65 } 66 67 !llvm.dbg.cu = !{!0} 68 !llvm.module.flags = !{!3, !4} 69 !llvm.ident = !{!5} 70 71 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !2) 72 !1 = !DIFile(filename: "/tmp/kk.c", directory: "/tmp") 73 !2 = !{} 74 !3 = !{i32 2, !"Debug Info Version", i32 3} 75 !4 = !{i32 1, !"PIC Level", i32 2} 76 !5 = !{!"clang version 3.9.0 "} 77 !6 = distinct !DISubprogram(name: "success", scope: !1, file: !1, line: 1, type: !7, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2) 78 !7 = !DISubroutineType(types: !2) 79 !8 = !DILocation(line: 2, column: 20, scope: !6) 80 !9 = !DILocation(line: 2, column: 21, scope: !6) 81 !10 = !DILocation(line: 2, column: 22, scope: !6) 82
