ce40fa13ce
loops. We do this by reconstructing the newly added loops after the unroll completes to avoid threading pass manager details through all the mess of the unrolling infrastructure. I've enabled some extra assertions in the LPM to try and catch issues here and enabled a bunch of unroller tests to try and make sure this is sane. Currently, I'm manually running loop-simplify when needed. That should go away once it is folded into the LPM infrastructure. Differential Revision: https://reviews.llvm.org/D28848 llvm-svn: 293011
76 lines
4.0 KiB
LLVM
76 lines
4.0 KiB
LLVM
; RUN: opt < %s -S -loop-unroll -unroll-runtime -unroll-count=2 -unroll-runtime-epilog=true | FileCheck %s -check-prefix=EPILOG
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; RUN: opt < %s -S -loop-unroll -unroll-runtime -unroll-count=2 -unroll-runtime-epilog=false | FileCheck %s -check-prefix=PROLOG
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; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop(unroll)' -unroll-runtime -unroll-count=2 -unroll-runtime-epilog=true | FileCheck %s -check-prefix=EPILOG
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; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop(unroll)' -unroll-runtime -unroll-count=2 -unroll-runtime-epilog=false | FileCheck %s -check-prefix=PROLOG
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; This tests that setting the unroll count works
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; EPILOG: for.body.preheader:
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; EPILOG: br i1 %1, label %for.end.loopexit.unr-lcssa, label %for.body.preheader.new, !dbg [[PH_LOC:![0-9]+]]
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; EPILOG: for.body:
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; EPILOG: br i1 %niter.ncmp.1, label %for.end.loopexit.unr-lcssa.loopexit, label %for.body, !dbg [[BODY_LOC:![0-9]+]]
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; EPILOG-NOT: br i1 %niter.ncmp.2, label %for.end.loopexit{{.*}}, label %for.body
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; EPILOG: for.body.epil.preheader:
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; EPILOG: br label %for.body.epil, !dbg [[EXIT_LOC:![0-9]+]]
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; EPILOG: for.body.epil:
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; EPILOG: br label %for.end.loopexit.epilog-lcssa, !dbg [[BODY_LOC:![0-9]+]]
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; EPILOG-DAG: [[PH_LOC]] = !DILocation(line: 101, column: 1, scope: !{{.*}})
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; EPILOG-DAG: [[BODY_LOC]] = !DILocation(line: 102, column: 1, scope: !{{.*}})
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; EPILOG-DAG: [[EXIT_LOC]] = !DILocation(line: 103, column: 1, scope: !{{.*}})
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; PROLOG: for.body.preheader:
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; PROLOG: br {{.*}} label %for.body.prol.preheader, label %for.body.prol.loopexit, !dbg [[PH_LOC:![0-9]+]]
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; PROLOG: for.body.prol:
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; PROLOG: br label %for.body.prol.loopexit, !dbg [[BODY_LOC:![0-9]+]]
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; PROLOG: for.body.prol.loopexit:
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; PROLOG: br {{.*}} label %for.end.loopexit, label %for.body.preheader.new, !dbg [[PH_LOC]]
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; PROLOG: for.body:
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; PROLOG: br i1 %exitcond.1, label %for.end.loopexit.unr-lcssa, label %for.body, !dbg [[BODY_LOC]]
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; PROLOG-NOT: br i1 %exitcond.4, label %for.end.loopexit{{.*}}, label %for.body
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; PROLOG-DAG: [[PH_LOC]] = !DILocation(line: 101, column: 1, scope: !{{.*}})
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; PROLOG-DAG: [[BODY_LOC]] = !DILocation(line: 102, column: 1, scope: !{{.*}})
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define i32 @test(i32* nocapture %a, i32 %n) nounwind uwtable readonly !dbg !6 {
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entry:
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%cmp1 = icmp eq i32 %n, 0, !dbg !7
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br i1 %cmp1, label %for.end, label %for.body, !dbg !7
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
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%sum.02 = phi i32 [ %add, %for.body ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv, !dbg !8
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%0 = load i32, i32* %arrayidx, align 4, !dbg !8
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%add = add nsw i32 %0, %sum.02, !dbg !8
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%indvars.iv.next = add i64 %indvars.iv, 1, !dbg !9
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !9
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%exitcond = icmp eq i32 %lftr.wideiv, %n, !dbg !9
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br i1 %exitcond, label %for.end, label %for.body, !dbg !9
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for.end: ; preds = %for.body, %entry
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%sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ]
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ret i32 %sum.0.lcssa, !dbg !10
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}
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!llvm.module.flags = !{!0, !1, !2}
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!llvm.dbg.cu = !{!11}
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!0 = !{i32 2, !"Dwarf Version", i32 4}
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!1 = !{i32 2, !"Debug Info Version", i32 3}
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!2 = !{i32 1, !"PIC Level", i32 2}
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!3 = !{}
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!4 = !DISubroutineType(types: !3)
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!5 = !DIFile(filename: "test.cpp", directory: "/tmp")
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!6 = distinct !DISubprogram(name: "test", scope: !5, file: !5, line: 99, type: !4, isLocal: false, isDefinition: true, scopeLine: 100, flags: DIFlagPrototyped, isOptimized: false, unit: !11, variables: !3)
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!7 = !DILocation(line: 100, column: 1, scope: !6)
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!8 = !DILocation(line: 101, column: 1, scope: !6)
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!9 = !DILocation(line: 102, column: 1, scope: !6)
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!10 = !DILocation(line: 103, column: 1, scope: !6)
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!11 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang",
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file: !5,
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isOptimized: true, flags: "-O2",
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splitDebugFilename: "abc.debug", emissionKind: 2)
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