| ; RUN: opt < %s -passes=licm -pass-remarks-missed=licm -o /dev/null 2>&1 | FileCheck %s |
| ; RUN: opt -aa-pipeline=basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,require<opt-remark-emit>,loop-mssa(licm)' %s -o /dev/null -pass-remarks-missed=licm 2>&1 | FileCheck %s |
| 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" |
| |
| ; With the load from %p conditional, we can't optmize this and the remark |
| ; should tell us about it. |
| |
| define void @test(ptr %array, ptr noalias %p) { |
| Entry: |
| br label %Loop |
| |
| Loop: |
| %j = phi i32 [ 0, %Entry ], [ %Next, %else] |
| %addr = getelementptr i32, ptr %array, i32 %j |
| %a = load i32, ptr %addr |
| %c = icmp eq i32 %a, 0 |
| br i1 %c, label %then, label %else |
| |
| then: |
| ; CHECK: remark: /tmp/kk.c:2:20: failed to hoist load with loop-invariant address because load is conditionally executed |
| %b = load i32, ptr %p, !dbg !8 |
| %a2 = add i32 %a, %b |
| store i32 %a2, ptr %addr |
| br label %else |
| |
| else: |
| %Next = add i32 %j, 1 |
| %cond = icmp eq i32 %Next, 0 |
| br i1 %cond, label %Out, label %Loop |
| |
| Out: |
| ret void |
| } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4} |
| !llvm.ident = !{!5} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !2) |
| !1 = !DIFile(filename: "/tmp/kk.c", directory: "/tmp") |
| !2 = !{} |
| !3 = !{i32 2, !"Debug Info Version", i32 3} |
| !4 = !{i32 1, !"PIC Level", i32 2} |
| !5 = !{!"clang version 3.9.0 "} |
| !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) |
| !7 = !DISubroutineType(types: !2) |
| !8 = !DILocation(line: 2, column: 20, scope: !6) |