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1; RUN: opt < %s -passes=licm -pass-remarks-missed=licm -o /dev/null 2>&1 | FileCheck %s2; RUN: opt -aa-pipeline=basic-aa -passes='require<aa>,require<target-ir>,require<scalar-evolution>,require<opt-remark-emit>,loop-mssa(licm)' %s -o /dev/null -pass-remarks-missed=licm 2>&1 | FileCheck %s3target 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; Without the noalias on %p, we can't optmize this and the remark should tell6; us about it.7 8define void @test(ptr %array, ptr %p) {9Entry:10 br label %Loop11 12Loop:13 %j = phi i32 [ 0, %Entry ], [ %Next, %Loop ]14 %addr = getelementptr i32, ptr %array, i32 %j15 %a = load i32, ptr %addr16; CHECK: remark: /tmp/kk.c:2:20: failed to move load with loop-invariant address because the loop may invalidate its value17 %b = load i32, ptr %p, !dbg !818 %a2 = add i32 %a, %b19 store i32 %a2, ptr %addr20 %Next = add i32 %j, 121 %cond = icmp eq i32 %Next, 022 br i1 %cond, label %Out, label %Loop23 24Out:25 ret void26}27 28; This illustrates why we need to check loop-invariance before issuing this29; remark.30 31define i32 @invalidated_load_with_non_loop_invariant_address(ptr %array, ptr %array2) {32Entry:33 br label %Loop34 35Loop:36 %j = phi i32 [ 0, %Entry ], [ %Next, %Loop ]37 38; CHECK-NOT: /tmp/kk.c:3:20: {{.*}} loop-invariant39 %addr = getelementptr i32, ptr %array, i32 %j40 %a = load i32, ptr %addr, !dbg !941 42 %addr2 = getelementptr i32, ptr %array2, i32 %j43 store i32 %j, ptr %addr244 45 %Next = add i32 %j, 146 %cond = icmp eq i32 %Next, 047 br i1 %cond, label %Out, label %Loop48 49Out:50 %a2 = phi i32 [ %a, %Loop ]51 ret i32 %a252}53 54!llvm.dbg.cu = !{!0}55!llvm.module.flags = !{!3, !4}56!llvm.ident = !{!5}57 58!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !2)59!1 = !DIFile(filename: "/tmp/kk.c", directory: "/tmp")60!2 = !{}61!3 = !{i32 2, !"Debug Info Version", i32 3}62!4 = !{i32 1, !"PIC Level", i32 2}63!5 = !{!"clang version 3.9.0 "}64!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)65!7 = !DISubroutineType(types: !2)66!8 = !DILocation(line: 2, column: 20, scope: !6)67!9 = !DILocation(line: 3, column: 20, scope: !6)68